Pub Date : 2024-08-01DOI: 10.1088/0256-307x/41/8/088201
Zihan Xu, Hanwen An, Jiajun Wang
The rapid advancement in electric vehicles and electrochemical energy storage technology has raised the demands placed on rechargeable batteries. It is essential to comprehend the operational principles and degradation mechanisms of batteries across multiple scales to propel the research on rechargeable batteries for the next generation forward. Microstructure, phase information, and lattice of energy materials in both two dimensions and three dimensions can be intuitively obtained through the utilization of x-ray imaging techniques. Additionally, x-ray imaging technology is increasingly gaining attention due to its non-destructive nature and high penetrative capability, enabling in situ experiments and multi-scale spatial resolution. In this review, we initially overview the basic principles and characteristics of several key x-ray imaging technologies. Each x-ray imaging technology is tailored to specific application scenarios. Furthermore, examples of multi-scale implementations of x-ray imaging technologies in the field of rechargeable batteries are discussed. This review is anticipated to augment the comprehension of readers for x-ray imaging techniques as well as to stimulate the development of novel concepts and approaches in rechargeable battery research.
电动汽车和电化学储能技术的快速发展提高了对充电电池的要求。了解电池在多个尺度上的工作原理和降解机制对于推动下一代充电电池的研究至关重要。通过利用 X 射线成像技术，可以直观地获得能源材料在二维和三维空间的微观结构、相信息和晶格。此外，X 射线成像技术由于其非破坏性和高穿透能力，可实现原位实验和多尺度空间分辨率，正日益受到人们的关注。在本综述中，我们首先概述了几种关键 X 射线成像技术的基本原理和特点。每种 X 射线成像技术都是针对特定应用场景量身定制的。此外，还讨论了 X 射线成像技术在充电电池领域的多尺度应用实例。预计本综述将增强读者对 X 射线成像技术的理解，并促进充电电池研究领域新概念和新方法的发展。
{"title":"Multi-Scale X-Ray Imaging Technologies for Rechargeable Batteries","authors":"Zihan Xu, Hanwen An, Jiajun Wang","doi":"10.1088/0256-307x/41/8/088201","DOIUrl":"https://doi.org/10.1088/0256-307x/41/8/088201","url":null,"abstract":"The rapid advancement in electric vehicles and electrochemical energy storage technology has raised the demands placed on rechargeable batteries. It is essential to comprehend the operational principles and degradation mechanisms of batteries across multiple scales to propel the research on rechargeable batteries for the next generation forward. Microstructure, phase information, and lattice of energy materials in both two dimensions and three dimensions can be intuitively obtained through the utilization of x-ray imaging techniques. Additionally, x-ray imaging technology is increasingly gaining attention due to its non-destructive nature and high penetrative capability, enabling <italic toggle=\"yes\">in situ</italic> experiments and multi-scale spatial resolution. In this review, we initially overview the basic principles and characteristics of several key x-ray imaging technologies. Each x-ray imaging technology is tailored to specific application scenarios. Furthermore, examples of multi-scale implementations of x-ray imaging technologies in the field of rechargeable batteries are discussed. This review is anticipated to augment the comprehension of readers for x-ray imaging techniques as well as to stimulate the development of novel concepts and approaches in rechargeable battery research.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"18 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142206939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-01DOI: 10.1088/0256-307x/41/8/087401
Zhiming Pan, Chen Lu, Fan Yang, Congjun Wu
Recently, high temperature (Tc ≈ 80 K) superconductivity (SC) has been discovered in La3Ni2O7 (LNO) under pressure. This raises the question of whether the superconducting transition temperature Tc could be further enhanced under suitable conditions. One possible route for achieving higher Tc is element substitution. Similar SC could appear in the Fmmm phase of rare-earth (RE) R3Ni2O7 (RNO, R = RE element) material series under suitable pressure. The electronic properties in the RNO materials are dominated by the Ni 3d orbitals in the bilayer NiO2 plane. In the strong coupling limit, the SC could be fully characterized by a bilayer single 3dx2–y2-orbital t–J∥–J⊥ model. With RE element substitution from La to other RE element, the lattice constant of the Fmmm RNO material decreases, and the resultant electronic hopping integral increases, leading to stronger superexchanges between the 3dx2–y2 orbitals. Based on the slave-boson mean-field theory, we explore the pairing nature and the evolution of Tc in RNO materials under pressure. Consequently, it is found that the element substitution does not alter the pairing nature, i.e., the inter-layer s-wave pairing is always favored in the superconducting RNO under pressure. However, the Tc increases from La to Sm, and a nearly doubled Tc could be realized in SmNO under pressure. This work provides evidence for possible higher Tc R3Ni2O7 materials, which may be realized in further experiments.
最近，在 La3Ni2O7（LNO）中发现了压力下的高温（Tc ≈ 80 K）超导电性（SC）。这就提出了一个问题：在合适的条件下，超导转变温度 Tc 是否可以进一步提高。实现更高的 Tc 的一个可能途径是元素替代。在适当的压力下，稀土（RE）R3Ni2O7（RNO，R = RE 元素）材料系列的 Fmmm 相也会出现类似的超导转变。RNO 材料的电子特性由双层 NiO2 平面上的 Ni 3d 轨道主导。在强耦合极限下，双层单 3dx2-y2 轨道 t-J∥-J⊥ 模型可完全表征 SC 的特性。随着RE元素从La到其他RE元素的替换，Fmmm RNO材料的晶格常数减小，电子跳跃积分随之增大，从而导致3dx2-y2轨道之间更强的超交换。基于从玻色子均场理论，我们探讨了 RNO 材料在压力作用下的配对性质和 Tc 演变。结果发现，元素替代并不改变配对性质，即在压力作用下，超导 RNO 材料总是倾向于层间 s 波配对。然而，从 La 到 Sm 的 Tc 会增加，SmNO 在压力下的 Tc 几乎增加了一倍。这项研究为可能的更高 Tc R3Ni2O7 材料提供了证据，这些材料可能会在进一步的实验中实现。
{"title":"Effect of Rare-Earth Element Substitution in Superconducting R3Ni2O7 under Pressure","authors":"Zhiming Pan, Chen Lu, Fan Yang, Congjun Wu","doi":"10.1088/0256-307x/41/8/087401","DOIUrl":"https://doi.org/10.1088/0256-307x/41/8/087401","url":null,"abstract":"Recently, high temperature (<italic toggle=\"yes\">T</italic><sub>c</sub> ≈ 80 K) superconductivity (SC) has been discovered in La<sub>3</sub>Ni<sub>2</sub>O<sub>7</sub> (LNO) under pressure. This raises the question of whether the superconducting transition temperature <italic toggle=\"yes\">T</italic><sub>c</sub> could be further enhanced under suitable conditions. One possible route for achieving higher <italic toggle=\"yes\">T</italic><sub>c</sub> is element substitution. Similar SC could appear in the <italic toggle=\"yes\">Fmmm</italic> phase of rare-earth (RE) R<sub>3</sub>Ni<sub>2</sub>O<sub>7</sub> (RNO, R = RE element) material series under suitable pressure. The electronic properties in the RNO materials are dominated by the Ni 3<italic toggle=\"yes\">d</italic> orbitals in the bilayer NiO<sub>2</sub> plane. In the strong coupling limit, the SC could be fully characterized by a bilayer single 3<italic toggle=\"yes\">d</italic><sub><italic toggle=\"yes\">x</italic><sup>2</sup>–<italic toggle=\"yes\">y</italic><sup>2</sup></sub>-orbital <italic toggle=\"yes\">t</italic>–<italic toggle=\"yes\">J</italic><sub>∥</sub>–<italic toggle=\"yes\">J</italic><sub>⊥</sub> model. With RE element substitution from La to other RE element, the lattice constant of the <italic toggle=\"yes\">Fmmm</italic> RNO material decreases, and the resultant electronic hopping integral increases, leading to stronger superexchanges between the 3<italic toggle=\"yes\">d</italic><sub><italic toggle=\"yes\">x</italic><sup>2</sup>–<italic toggle=\"yes\">y</italic><sup>2</sup></sub> orbitals. Based on the slave-boson mean-field theory, we explore the pairing nature and the evolution of <italic toggle=\"yes\">T</italic><sub>c</sub> in RNO materials under pressure. Consequently, it is found that the element substitution does not alter the pairing nature, i.e., the inter-layer s-wave pairing is always favored in the superconducting RNO under pressure. However, the <italic toggle=\"yes\">T</italic><sub>c</sub> increases from La to Sm, and a nearly doubled <italic toggle=\"yes\">T</italic><sub>c</sub> could be realized in SmNO under pressure. This work provides evidence for possible higher <italic toggle=\"yes\">T</italic><sub>c</sub> R<sub>3</sub>Ni<sub>2</sub>O<sub>7</sub> materials, which may be realized in further experiments.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"57 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-01DOI: 10.1088/0256-307x/41/8/081402
Ju-Jun Xie, Li-Sheng Geng
Recently, a new excited baryon state, Ω(2012), was observed in the invariant mass spectra of K−Ξ0 and KS0Ξ− by the Belle collaboration. This state has a narrow width (∼ 6 MeV) compared to other baryon states with a similar mass. Here, we provide a mini-review on the Ω(2012) state from the molecular perspective, where it appears to be a dynamically generated state with spin-parity 3/2− from the coupled-channels interactions of the K¯Ξ(1530) and ηΩ in s-wave and K¯Ξ in d-wave. Additionally, alternative explanations for the Ω(2012) resonance are also discussed.
{"title":"The Ω(2012) as a Hadronic Molecule","authors":"Ju-Jun Xie, Li-Sheng Geng","doi":"10.1088/0256-307x/41/8/081402","DOIUrl":"https://doi.org/10.1088/0256-307x/41/8/081402","url":null,"abstract":"Recently, a new excited baryon state, <italic toggle=\"yes\">Ω</italic>(2012), was observed in the invariant mass spectra of <inline-formula><tex-math>\u0000<?CDATA ${K}^{-}{varXi }^{0}$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>Ξ</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:mrow></mml:math>\u0000<inline-graphic xlink:href=\"cpl_41_8_081402_ieqn1.gif\"></inline-graphic></inline-formula> and <inline-formula><tex-math>\u0000<?CDATA ${K}_{S}^{0}{varXi }^{-}$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mrow><mml:msubsup><mml:mi>K</mml:mi><mml:mi>S</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:msup><mml:mi>Ξ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:math>\u0000<inline-graphic xlink:href=\"cpl_41_8_081402_ieqn2.gif\"></inline-graphic></inline-formula> by the Belle collaboration. This state has a narrow width (∼ 6 MeV) compared to other baryon states with a similar mass. Here, we provide a mini-review on the <italic toggle=\"yes\">Ω</italic>(2012) state from the molecular perspective, where it appears to be a dynamically generated state with spin-parity 3/2<sup>−</sup> from the coupled-channels interactions of the <inline-formula><tex-math>\u0000<?CDATA $bar{K}varXi (1530)$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mrow><mml:mover accent=\"true\"><mml:mi>K</mml:mi><mml:mo stretchy=\"false\">¯</mml:mo></mml:mover><mml:mi>Ξ</mml:mi><mml:mo stretchy=\"false\">(</mml:mo><mml:mn>1530</mml:mn><mml:mo stretchy=\"false\">)</mml:mo></mml:mrow></mml:math>\u0000<inline-graphic xlink:href=\"cpl_41_8_081402_ieqn3.gif\"></inline-graphic></inline-formula> and <italic toggle=\"yes\">ηΩ</italic> in <italic toggle=\"yes\">s</italic>-wave and <inline-formula><tex-math>\u0000<?CDATA $bar{K}varXi $?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mrow><mml:mover accent=\"true\"><mml:mi>K</mml:mi><mml:mo stretchy=\"false\">¯</mml:mo></mml:mover><mml:mi>Ξ</mml:mi></mml:mrow></mml:math>\u0000<inline-graphic xlink:href=\"cpl_41_8_081402_ieqn4.gif\"></inline-graphic></inline-formula> in <italic toggle=\"yes\">d</italic>-wave. Additionally, alternative explanations for the <italic toggle=\"yes\">Ω</italic>(2012) resonance are also discussed.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"25 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-01DOI: 10.1088/0256-307x/41/8/084205
Han Yao, Jin-Yan Lin, Li-Bang Chen, Yi-Kun Liu, Jian-Ying Zhou
The outstanding issue to overcoming atmospheric turbulence on distant imaging is a fundamental interest and technological challenge. We propose a novel scenario and technique to restore the optical image in turbulent environmental by referring to Cyclopean image with binocular vision. With human visual intelligence, image distortion resulting from the turbulence is shown to be substantially suppressed. Numerical simulation results taking into account of the atmospheric turbulence, optical image system, image sensors, display and binocular vision perception are presented to demonstrate the robustness of the image restoration, which is compared with a single channel planar optical imaging and sensing. Experiment involving binocular telescope, image recording and the stereo-image display is conducted and good agreement is obtained between the simulation with perceptive experience. A natural extension of the scenario is to enhance the capability of anti-vibration or anti-shaking for general optical imaging with Cyclopean image.
{"title":"Turbulent Image Restoration in Atmosphere with Cyclopean Processing via Binocular Fusion","authors":"Han Yao, Jin-Yan Lin, Li-Bang Chen, Yi-Kun Liu, Jian-Ying Zhou","doi":"10.1088/0256-307x/41/8/084205","DOIUrl":"https://doi.org/10.1088/0256-307x/41/8/084205","url":null,"abstract":"The outstanding issue to overcoming atmospheric turbulence on distant imaging is a fundamental interest and technological challenge. We propose a novel scenario and technique to restore the optical image in turbulent environmental by referring to Cyclopean image with binocular vision. With human visual intelligence, image distortion resulting from the turbulence is shown to be substantially suppressed. Numerical simulation results taking into account of the atmospheric turbulence, optical image system, image sensors, display and binocular vision perception are presented to demonstrate the robustness of the image restoration, which is compared with a single channel planar optical imaging and sensing. Experiment involving binocular telescope, image recording and the stereo-image display is conducted and good agreement is obtained between the simulation with perceptive experience. A natural extension of the scenario is to enhance the capability of anti-vibration or anti-shaking for general optical imaging with Cyclopean image.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"59 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We systematically investigate in-plane transport properties of ternary chalcogenide Bi2Rh3Se2. Upon rotating the magnetic field within the plane of the sample, one can distinctly detect the presence of both planar Hall resistance and anisotropic longitudinal resistance, and the phenomena appeared are precisely described by the theoretical formulation of the planar Hall effect (PHE). In addition, anisotropic orbital magnetoresistance rather than topologically nontrivial chiral anomalies dominates the PHE in Bi2Rh3Se2. The finding not only provides another platform for understanding the mechanism of PHE, but could also be beneficial for future planar Hall sensors based on two-dimensional materials.
{"title":"Planar Hall Effect in the Charge-Density-Wave Bi2Rh3Se2","authors":"Mingju Cai, Zheng Chen, Yang Yang, Xiangde Zhu, Haoxiang Sun, Ankang Zhu, Xue Liu, Yuyan Han, Wenshuai Gao, Mingliang Tian","doi":"10.1088/0256-307x/41/7/077303","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077303","url":null,"abstract":"We systematically investigate in-plane transport properties of ternary chalcogenide Bi<sub>2</sub>Rh<sub>3</sub>Se<sub>2</sub>. Upon rotating the magnetic field within the plane of the sample, one can distinctly detect the presence of both planar Hall resistance and anisotropic longitudinal resistance, and the phenomena appeared are precisely described by the theoretical formulation of the planar Hall effect (PHE). In addition, anisotropic orbital magnetoresistance rather than topologically nontrivial chiral anomalies dominates the PHE in Bi<sub>2</sub>Rh<sub>3</sub>Se<sub>2</sub>. The finding not only provides another platform for understanding the mechanism of PHE, but could also be beneficial for future planar Hall sensors based on two-dimensional materials.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"45 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/0256-307x/41/7/077302
Bei Cao, Chongze Han, Xiang Hao, Chen Wang, Jincheng Lu
We present a study on inelastic thermoelectric devices, wherein charge currents and electronic and phononic heat currents are intricately interconnected. The employment of double quantum dots in conjunction with a phonon reservoir positions them as promising candidates for quantum thermoelectric diodes and transistors. We illustrate that quantum coherence yields significant charge and Seebeck rectification effects. It is worth noting that, while the thermal transistor effect is observable in the linear response regime, especially when phonon-assisted inelastic processes dominate the transport, quantum coherence does not enhance thermal amplification. Our work may provide valuable insights for the optimization of inelastic thermoelectric devices.
{"title":"Impact of Quantum Coherence on Inelastic Thermoelectric Devices: From Diode to Transistor","authors":"Bei Cao, Chongze Han, Xiang Hao, Chen Wang, Jincheng Lu","doi":"10.1088/0256-307x/41/7/077302","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077302","url":null,"abstract":"We present a study on inelastic thermoelectric devices, wherein charge currents and electronic and phononic heat currents are intricately interconnected. The employment of double quantum dots in conjunction with a phonon reservoir positions them as promising candidates for quantum thermoelectric diodes and transistors. We illustrate that quantum coherence yields significant charge and Seebeck rectification effects. It is worth noting that, while the thermal transistor effect is observable in the linear response regime, especially when phonon-assisted inelastic processes dominate the transport, quantum coherence does not enhance thermal amplification. Our work may provide valuable insights for the optimization of inelastic thermoelectric devices.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"9 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/0256-307x/41/7/077102
Xiege Huang, Jialiang Li, Haoqin Ma, Changlong Li, Tianle Liu, Bo Duan, Pengcheng Zhai, Guodong Li
Band convergence is considered to be a strategy with clear benefits for thermoelectric performance, generally favoring the co-optimization of conductivity and Seebeck coefficients, and the conventional means include elemental filling to regulate the band. However, the influence of the most electronegative fluorine on the CoSb3 band remains unclear. We carry out density-functional-theory calculations and show that the valence band maximum gradually shifts downward with the increase of fluorine filling, lastly the valence band maximum converges to the highly degenerated secondary valence bands in fluorine-filled skutterudites. The effective degeneracy near the secondary valence band promotes more valleys to participate in electric transport, leading to a carrier mobility of more than the threefold and nearly twofold effective mass for F0.1Co4Sb12 compared to Co4Sb12. This work provides a new and promising route to boost the thermoelectric properties of p-type skutterudites.
{"title":"Valence Bands Convergence in p-Type CoSb3 through Electronegative Fluorine Filling","authors":"Xiege Huang, Jialiang Li, Haoqin Ma, Changlong Li, Tianle Liu, Bo Duan, Pengcheng Zhai, Guodong Li","doi":"10.1088/0256-307x/41/7/077102","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077102","url":null,"abstract":"Band convergence is considered to be a strategy with clear benefits for thermoelectric performance, generally favoring the co-optimization of conductivity and Seebeck coefficients, and the conventional means include elemental filling to regulate the band. However, the influence of the most electronegative fluorine on the CoSb<sub>3</sub> band remains unclear. We carry out density-functional-theory calculations and show that the valence band maximum gradually shifts downward with the increase of fluorine filling, lastly the valence band maximum converges to the highly degenerated secondary valence bands in fluorine-filled skutterudites. The effective degeneracy near the secondary valence band promotes more valleys to participate in electric transport, leading to a carrier mobility of more than the threefold and nearly twofold effective mass for F<sub>0.1</sub>Co<sub>4</sub>Sb<sub>12</sub> compared to Co<sub>4</sub>Sb<sub>12</sub>. This work provides a new and promising route to boost the thermoelectric properties of p-type skutterudites.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"14 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-30DOI: 10.1088/0256-307x/41/7/070302
Yu Zhang, 钰 张, Chuiping Yang, 垂平 杨, Qiping Su, 奇平 苏, Yihao Kang, 逸豪 康, Wen Zheng, 文 郑, Shaoxiong Li, 邵雄 李, Yang Yu and 扬 于
We propose a simple quantum voting machine using microwave photon qubit encoding, based on a setup comprising multiple microwave cavities and a coupled superconducting flux qutrit. This approach primarily relies on a multi-control single-target quantum phase gate. The scheme offers operational simplicity, requiring only a single step, while ensuring verifiability through the measurement of a single qubit phase information to obtain the voting results. It provides voter anonymity, as the voting outcome is solely tied to the total number of affirmative votes. Our quantum voting machine also has scalability in terms of the number of voters. Additionally, the physical realization of the quantum voting machine is general and not limited to circuit quantum electrodynamics. Quantum voting machine can be implemented as long as the multi-control single-phase quantum phase gate is realized in other physical systems. Numerical simulations indicate the feasibility of this quantum voting machine within the current quantum technology.
{"title":"Quantum Voting Machine Encoded with Microwave Photons","authors":"Yu Zhang, 钰 张, Chuiping Yang, 垂平 杨, Qiping Su, 奇平 苏, Yihao Kang, 逸豪 康, Wen Zheng, 文 郑, Shaoxiong Li, 邵雄 李, Yang Yu and 扬 于","doi":"10.1088/0256-307x/41/7/070302","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/070302","url":null,"abstract":"We propose a simple quantum voting machine using microwave photon qubit encoding, based on a setup comprising multiple microwave cavities and a coupled superconducting flux qutrit. This approach primarily relies on a multi-control single-target quantum phase gate. The scheme offers operational simplicity, requiring only a single step, while ensuring verifiability through the measurement of a single qubit phase information to obtain the voting results. It provides voter anonymity, as the voting outcome is solely tied to the total number of affirmative votes. Our quantum voting machine also has scalability in terms of the number of voters. Additionally, the physical realization of the quantum voting machine is general and not limited to circuit quantum electrodynamics. Quantum voting machine can be implemented as long as the multi-control single-phase quantum phase gate is realized in other physical systems. Numerical simulations indicate the feasibility of this quantum voting machine within the current quantum technology.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"11 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141547978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
High-order quantum coherence reveals the statistical correlation of quantum particles. Manipulation of quantum coherence of light in the temporal domain enables the production of the single-photon source, which has become one of the most important quantum resources. High-order quantum coherence in the spatial domain plays a crucial role in a variety of applications, such as quantum imaging, holography, and microscopy. However, the active control of second-order spatial quantum coherence remains a challenging task. Here we predict theoretically and demonstrate experimentally the first active manipulation of second-order spatial quantum coherence, which exhibits the capability of switching between bunching and anti-bunching, by mapping the entanglement of spatially structured photons. We also show that signal processing based on quantum coherence exhibits robust resistance to intensity disturbance. Our findings not only enhance existing applications but also pave the way for broader utilization of higher-order spatial quantum coherence.
{"title":"Manipulating the Spatial Structure of Second-Order Quantum Coherence Using Entangled Photons","authors":"Shuang-Yin Huang, 双印 黄, Jing Gao, 菁 高, Zhi-Cheng Ren, 志成 任, Zi-Mo Cheng, 子默 程, Wen-Zheng Zhu, 文正 朱, Shu-Tian Xue, 舒天 薛, Yan-Chao Lou, 严超 娄, Zhi-Feng Liu, 志峰 刘, Chao Chen, 超 陈, Fei Zhu, 飞 朱, Li-Ping Yang, 立平 杨, Xi-Lin Wang, 喜林 汪, Hui-Tian Wang and 慧田 王","doi":"10.1088/0256-307x/41/7/074205","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/074205","url":null,"abstract":"High-order quantum coherence reveals the statistical correlation of quantum particles. Manipulation of quantum coherence of light in the temporal domain enables the production of the single-photon source, which has become one of the most important quantum resources. High-order quantum coherence in the spatial domain plays a crucial role in a variety of applications, such as quantum imaging, holography, and microscopy. However, the active control of second-order spatial quantum coherence remains a challenging task. Here we predict theoretically and demonstrate experimentally the first active manipulation of second-order spatial quantum coherence, which exhibits the capability of switching between bunching and anti-bunching, by mapping the entanglement of spatially structured photons. We also show that signal processing based on quantum coherence exhibits robust resistance to intensity disturbance. Our findings not only enhance existing applications but also pave the way for broader utilization of higher-order spatial quantum coherence.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"25 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-30DOI: 10.1088/0256-307x/41/7/077301
Sanyi You, Jiaqi An and Zhenhua Qiao
The reliance on spin-orbit coupling or strong magnetic fields has always posed significant challenges for the mass production and even laboratory realization of most topological materials. Valley-based topological zero-line modes have attracted widespread attention due to their substantial advantage of being initially realizable with just an external electric field. However, the uncontrollable nature of electrode alignment and precise fabrication has greatly hindered the advancement in this field. By utilizing minimally twisted bilayer graphene and introducing exchange fields from magnetic substrates, we successfully realize a spin-resolved, electrode-free topological zero-line mode. Further integration of electrodes that do not require alignment considerations significantly enhances the tunability of the system’s band structure. Our approach offers a promising new support for the dazzling potential of topological zero-line mode in the realm of low-energy-consumption electronics.
{"title":"Spin Resolved Zero-Line Modes in Minimally Twisted Bilayer Graphene from Exchange Field and Gate Voltage","authors":"Sanyi You, Jiaqi An and Zhenhua Qiao","doi":"10.1088/0256-307x/41/7/077301","DOIUrl":"https://doi.org/10.1088/0256-307x/41/7/077301","url":null,"abstract":"The reliance on spin-orbit coupling or strong magnetic fields has always posed significant challenges for the mass production and even laboratory realization of most topological materials. Valley-based topological zero-line modes have attracted widespread attention due to their substantial advantage of being initially realizable with just an external electric field. However, the uncontrollable nature of electrode alignment and precise fabrication has greatly hindered the advancement in this field. By utilizing minimally twisted bilayer graphene and introducing exchange fields from magnetic substrates, we successfully realize a spin-resolved, electrode-free topological zero-line mode. Further integration of electrodes that do not require alignment considerations significantly enhances the tunability of the system’s band structure. Our approach offers a promising new support for the dazzling potential of topological zero-line mode in the realm of low-energy-consumption electronics.","PeriodicalId":10344,"journal":{"name":"Chinese Physics Letters","volume":"23 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141588281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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