Pub Date : 2021-04-14DOI: 10.1088/2633-4356/ac3d14
J. Neuwirth, F. Basso Basset, M. Rota, E. Roccia, C. Schimpf, K. Jöns, A. Rastelli, R. Trotta
The realization of a functional quantum repeater is one of the major research goals in long-distance quantum communication. Among the different approaches that are being followed, the one relying on quantum memories interfaced with deterministic quantum emitters is considered as one of the most promising solutions. In this work, we focus on the hardware to implement memory-based quantum-repeater schemes that rely on semiconductor quantum dots for the generation of polarization entangled photons. Going through the most relevant figures of merit related to efficiency of the photon source, we select significant developments in fabrication, processing and tuning techniques aimed at combining high degree of entanglement with on-demand pair generation, with a special focus on the progress achieved in the representative case of the GaAs system. We proceed to offer a perspective on integration with quantum memories, both highlighting preliminary works on natural-artificial atomic interfaces and commenting a wide choice of currently available and potentially viable memory solutions in terms of wavelength, bandwidth and noise-requirements. To complete the overview, we also present recent implementations of entanglement-based quantum communication protocols with quantum dots and highlight the next challenges ahead for the implementation of practical quantum networks.
{"title":"Quantum dot technology for quantum repeaters: from entangled photon generation towards the integration with quantum memories","authors":"J. Neuwirth, F. Basso Basset, M. Rota, E. Roccia, C. Schimpf, K. Jöns, A. Rastelli, R. Trotta","doi":"10.1088/2633-4356/ac3d14","DOIUrl":"https://doi.org/10.1088/2633-4356/ac3d14","url":null,"abstract":"\u0000 The realization of a functional quantum repeater is one of the major research goals in long-distance quantum communication. Among the different approaches that are being followed, the one relying on quantum memories interfaced with deterministic quantum emitters is considered as one of the most promising solutions. In this work, we focus on the hardware to implement memory-based quantum-repeater schemes that rely on semiconductor quantum dots for the generation of polarization entangled photons. Going through the most relevant figures of merit related to efficiency of the photon source, we select significant developments in fabrication, processing and tuning techniques aimed at combining high degree of entanglement with on-demand pair generation, with a special focus on the progress achieved in the representative case of the GaAs system. We proceed to offer a perspective on integration with quantum memories, both highlighting preliminary works on natural-artificial atomic interfaces and commenting a wide choice of currently available and potentially viable memory solutions in terms of wavelength, bandwidth and noise-requirements. To complete the overview, we also present recent implementations of entanglement-based quantum communication protocols with quantum dots and highlight the next challenges ahead for the implementation of practical quantum networks.","PeriodicalId":345750,"journal":{"name":"Materials for Quantum Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130715519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-17DOI: 10.1088/2633-4356/ac2e14
M. Müller, Raphael Hoepfl, L. Liensberger, S. Gepraegs, H. Huebl, M. Weiler, R. Gross, M. Althammer
M. Müller, 2, a) R. Hoepfl, 2 L. Liensberger, 2 S. Geprägs, H. Huebl, 2, 3 M. Weiler, 1, 2 R. Gross, 2, 3 and M. Althammer 2, b) Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany Physik-Department, Technische Universität München, 85748 Garching, Germany Munich Center for Quantum Science and Technology (MCQST), Schellingstraße 4, 80799 München, Germany Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
m·穆勒(2 l r (a) Hoepfl Liensberger 1,2 s Geprägs Huebl,二、三,格罗斯r m的小,1,2,2,3 m and Althammer二b) Walther-Meißner-Institut穿着巴伐利亚科学院,85748 Garching,德国Physik-Department技术慕尼黑大学85748 Garching,德国慕尼黑份额的科学与技术中心(MCQST) Schellingstraße 4 80799慕尼黑,德国物理学系与Landesforschungszentrum OPTIMAS技术Kaiserslautern大学德国
{"title":"Growth optimization of TaN for superconducting spintronics","authors":"M. Müller, Raphael Hoepfl, L. Liensberger, S. Gepraegs, H. Huebl, M. Weiler, R. Gross, M. Althammer","doi":"10.1088/2633-4356/ac2e14","DOIUrl":"https://doi.org/10.1088/2633-4356/ac2e14","url":null,"abstract":"M. Müller, 2, a) R. Hoepfl, 2 L. Liensberger, 2 S. Geprägs, H. Huebl, 2, 3 M. Weiler, 1, 2 R. Gross, 2, 3 and M. Althammer 2, b) Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany Physik-Department, Technische Universität München, 85748 Garching, Germany Munich Center for Quantum Science and Technology (MCQST), Schellingstraße 4, 80799 München, Germany Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany","PeriodicalId":345750,"journal":{"name":"Materials for Quantum Technology","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124753183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-15DOI: 10.1088/2633-4356/abd3b1
Jason M. Smith
{"title":"Introducing Materials for Quantum Technology","authors":"Jason M. Smith","doi":"10.1088/2633-4356/abd3b1","DOIUrl":"https://doi.org/10.1088/2633-4356/abd3b1","url":null,"abstract":"","PeriodicalId":345750,"journal":{"name":"Materials for Quantum Technology","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121362902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-02DOI: 10.1088/2633-4356/abd016
Tsz Chai Fung, A. Karenowska, J. Gregg
We propose and experimentally demonstrate a means of broadband phonon-magnon interconversion that relies on combining magnetoelastic coupling with translational symmetry breaking in the important experimental material yttrium iron garnet (YIG). As well as being of interest for its basic physics, this quasiparticle coupling mechanism adds to the range of effects that potentially find useful application in hybrid solid-state quantum computing devices as well as low-power wave-based classical computing architectures. The magnon is a relative newcomer to the catwalk of hybrid solid-state quantum science but it has already begun to turn heads. The rich physics and ready tunability of microwave magnonic systems combined with their demonstrable compatibility with the existing tools of experimental solid-state quantum engineering suggest significant and wide-reaching opportunities, not only in device design, but also in fundamental research [1–14]. Moreover, in the context of classical computing, there has been steadily growing interest in the use of magnonic systems as a platform for wave-based information technologies that overcome the ever more pressing ‘heat death’ issues associated with conventional computing hardware [15–28]. Indeed, phase-modulated spin-waves have significant appeal as data carriers in both classical and quantum computing devices: they offer Joule-heat-free spin information transfer and their short wavelengths relative to electromagnetic waves of the same frequency (microwave-frequency spin waves have wavelengths in the millimetre to nanometre range) are highly conducive to progressive device miniaturization [24–28]. Moreover, the ability to interconvert between spin-wave or magnon signals and those in other physical domains—notably microwave photonics, spin currents, heat currents, and optics—is widely recognised as a further important dividend [27–30]. However, until now, a notable gap has existed in the catalogue of magnonic conversion effects. Though the coupling between the magnon and phonon systems of magnetic materials was, in fact, the inspiration for the original theoretical framework upon which all of spin-wave and magnon physics came to be based [31], the interconversion between magnon and phonon signals—as opposed to incoherent excitations—had yet to be practically demonstrated [32, 33]. In this paper, we propose and demonstrate the first experimental proof of principle of a novel phonon-based approach to magnon signal generation. The effect is predicated on a new quasiparticle coupling mechanism with two essential ingredients: magnetoelastic coupling of sufficient strength and appropriate symmetry in the magnonic host material; and energy-momentum matching between the phonons and the magnons. The latter is generally difficult to realise since the phonon and magnon dispersion relations overlap and hybridise only over a very narrow range of wavenumbers that would be impractical for broadband signal transfer. As explaine
{"title":"Broadband phonon to magnon conversion in yttrium iron garnet","authors":"Tsz Chai Fung, A. Karenowska, J. Gregg","doi":"10.1088/2633-4356/abd016","DOIUrl":"https://doi.org/10.1088/2633-4356/abd016","url":null,"abstract":"We propose and experimentally demonstrate a means of broadband phonon-magnon interconversion that relies on combining magnetoelastic coupling with translational symmetry breaking in the important experimental material yttrium iron garnet (YIG). As well as being of interest for its basic physics, this quasiparticle coupling mechanism adds to the range of effects that potentially find useful application in hybrid solid-state quantum computing devices as well as low-power wave-based classical computing architectures. The magnon is a relative newcomer to the catwalk of hybrid solid-state quantum science but it has already begun to turn heads. The rich physics and ready tunability of microwave magnonic systems combined with their demonstrable compatibility with the existing tools of experimental solid-state quantum engineering suggest significant and wide-reaching opportunities, not only in device design, but also in fundamental research [1–14]. Moreover, in the context of classical computing, there has been steadily growing interest in the use of magnonic systems as a platform for wave-based information technologies that overcome the ever more pressing ‘heat death’ issues associated with conventional computing hardware [15–28]. Indeed, phase-modulated spin-waves have significant appeal as data carriers in both classical and quantum computing devices: they offer Joule-heat-free spin information transfer and their short wavelengths relative to electromagnetic waves of the same frequency (microwave-frequency spin waves have wavelengths in the millimetre to nanometre range) are highly conducive to progressive device miniaturization [24–28]. Moreover, the ability to interconvert between spin-wave or magnon signals and those in other physical domains—notably microwave photonics, spin currents, heat currents, and optics—is widely recognised as a further important dividend [27–30]. However, until now, a notable gap has existed in the catalogue of magnonic conversion effects. Though the coupling between the magnon and phonon systems of magnetic materials was, in fact, the inspiration for the original theoretical framework upon which all of spin-wave and magnon physics came to be based [31], the interconversion between magnon and phonon signals—as opposed to incoherent excitations—had yet to be practically demonstrated [32, 33]. In this paper, we propose and demonstrate the first experimental proof of principle of a novel phonon-based approach to magnon signal generation. The effect is predicated on a new quasiparticle coupling mechanism with two essential ingredients: magnetoelastic coupling of sufficient strength and appropriate symmetry in the magnonic host material; and energy-momentum matching between the phonons and the magnons. The latter is generally difficult to realise since the phonon and magnon dispersion relations overlap and hybridise only over a very narrow range of wavenumbers that would be impractical for broadband signal transfer. As explaine","PeriodicalId":345750,"journal":{"name":"Materials for Quantum Technology","volume":"151 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113989918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-18DOI: 10.1088/2633-4356/abcbeb
Daniel Groll, Thilo Hahn, P. Machnikowski, D. Wigger, T. Kuhn
Color centers in hexagonal boron nitride (hBN) show stable single photon emission even at room temperature, making these systems a promising candidate for quantum information applications. Besides this remarkable property, also their interaction with longitudinal optical (LO) phonons is quite unique because they lead to dominant phonon sidebands (PSBs), well separated from the zero phonon line (ZPL). In this work we utilize this clear spectral separation to theoretically investigate the influence of phonon decay dynamics on time-dependent photoluminescence (PL) signals. Our simulations show, that by using tailored optical excitation schemes it is possible to create a superposition between the two LO modes, leading to a phonon quantum beat that manifests in the time-dependent PL signal.
{"title":"Controlling photoluminescence spectra of hBN color centers by selective phonon-assisted excitation: a theoretical proposal","authors":"Daniel Groll, Thilo Hahn, P. Machnikowski, D. Wigger, T. Kuhn","doi":"10.1088/2633-4356/abcbeb","DOIUrl":"https://doi.org/10.1088/2633-4356/abcbeb","url":null,"abstract":"Color centers in hexagonal boron nitride (hBN) show stable single photon emission even at room temperature, making these systems a promising candidate for quantum information applications. Besides this remarkable property, also their interaction with longitudinal optical (LO) phonons is quite unique because they lead to dominant phonon sidebands (PSBs), well separated from the zero phonon line (ZPL). In this work we utilize this clear spectral separation to theoretically investigate the influence of phonon decay dynamics on time-dependent photoluminescence (PL) signals. Our simulations show, that by using tailored optical excitation schemes it is possible to create a superposition between the two LO modes, leading to a phonon quantum beat that manifests in the time-dependent PL signal.","PeriodicalId":345750,"journal":{"name":"Materials for Quantum Technology","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114192103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-18DOI: 10.1088/2633-4356/abb07e
M. Holmes, Y. Arakawa
{"title":"The heat is on: towards the realization of non-cryogenic photonic quantum technologies","authors":"M. Holmes, Y. Arakawa","doi":"10.1088/2633-4356/abb07e","DOIUrl":"https://doi.org/10.1088/2633-4356/abb07e","url":null,"abstract":"","PeriodicalId":345750,"journal":{"name":"Materials for Quantum Technology","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122430793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-13DOI: 10.1088/2633-4356/10.4121/uuid:70cf99ac-5914-4381-abfa-8f9eed7004fd
M. Lodari, N. Hendrickx, W. Lawrie, T. Hsiao, L. Vandersypen, A. Sammak, M. Veldhorst, G. Scappucci
We engineer planar Ge/SiGe heterostructures for low disorder and quiet hole quantum dot operation by positioning the strained Ge channel 55~nm below the semiconductor/dielectric interface. In heterostructure field effect transistors, we measure a percolation density for two-dimensional hole transport of $2.1times10^{10}~text{cm}^{-2}$, indicative of a very low disorder potential landscape experienced by holes in the buried Ge channel. These Ge heterostructures support quiet operation of hole quantum dots and we measure charge noise levels that are below the detection limit $sqrt{S_text{E}}=0.2~mu text{eV}/sqrt{text{Hz}}$ at 1 Hz. These results establish planar Ge as a promising platform for scaled two-dimensional spin qubit arrays.
{"title":"Low percolation density and charge noise with holes in germanium","authors":"M. Lodari, N. Hendrickx, W. Lawrie, T. Hsiao, L. Vandersypen, A. Sammak, M. Veldhorst, G. Scappucci","doi":"10.1088/2633-4356/10.4121/uuid:70cf99ac-5914-4381-abfa-8f9eed7004fd","DOIUrl":"https://doi.org/10.1088/2633-4356/10.4121/uuid:70cf99ac-5914-4381-abfa-8f9eed7004fd","url":null,"abstract":"We engineer planar Ge/SiGe heterostructures for low disorder and quiet hole quantum dot operation by positioning the strained Ge channel 55~nm below the semiconductor/dielectric interface. In heterostructure field effect transistors, we measure a percolation density for two-dimensional hole transport of $2.1times10^{10}~text{cm}^{-2}$, indicative of a very low disorder potential landscape experienced by holes in the buried Ge channel. These Ge heterostructures support quiet operation of hole quantum dots and we measure charge noise levels that are below the detection limit $sqrt{S_text{E}}=0.2~mu text{eV}/sqrt{text{Hz}}$ at 1 Hz. These results establish planar Ge as a promising platform for scaled two-dimensional spin qubit arrays.","PeriodicalId":345750,"journal":{"name":"Materials for Quantum Technology","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131597639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-31DOI: 10.1088/2633-4356/abaa2f
N. Israelsen, I. Radko, N. Raatz, J. Meijer, U. Andersen, A. Huck
Optical emitters of quantum radiation in the solid state are important building blocks for emerging technologies making use of the laws of quantum mechanics. The efficiency of photon extraction from the host material is low for many solid-state systems due to their relatively high index of refraction. In this article we experimentally study the emission spectrum of an ensemble of nitrogen-vacancy defects implanted around 8nm below the planar diamond surface and in the vicinity of a planar silver mirror. Scanning the distance between diamond and the mirror, we observe an enhancement of the spectral emission power by up to a factor of 3. We construct a model based on classical dipoles and elucidate the observations as being caused by interference in the far field of the emitters.
{"title":"Nitrogen-vacancy defect emission spectra in the vicinity of an adjustable silver mirror","authors":"N. Israelsen, I. Radko, N. Raatz, J. Meijer, U. Andersen, A. Huck","doi":"10.1088/2633-4356/abaa2f","DOIUrl":"https://doi.org/10.1088/2633-4356/abaa2f","url":null,"abstract":"Optical emitters of quantum radiation in the solid state are important building blocks for emerging technologies making use of the laws of quantum mechanics. The efficiency of photon extraction from the host material is low for many solid-state systems due to their relatively high index of refraction. In this article we experimentally study the emission spectrum of an ensemble of nitrogen-vacancy defects implanted around 8nm below the planar diamond surface and in the vicinity of a planar silver mirror. Scanning the distance between diamond and the mirror, we observe an enhancement of the spectral emission power by up to a factor of 3. We construct a model based on classical dipoles and elucidate the observations as being caused by interference in the far field of the emitters.","PeriodicalId":345750,"journal":{"name":"Materials for Quantum Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122119481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-06DOI: 10.1088/2633-4356/ab9c3a
P. Mutter, G. Burkard
Pauli spin blockade (PSB) has long been an important tool for spin read-out in double quantum dot (DQD) systems with interdot tunneling $t$. In this paper we show that the blockade is lifted if the two dots experience distinct effective magnetic fields caused by site-dependent g-tensors $g_L$ and $g_R$ for the left and right dot, and that this effect can be more pronounced than the leakage current due to the spin-orbit interaction (SOI) via spin-flip tunneling and the hyperfine interaction (HFI) of the electron spin with the host nuclear spins. Using analytical results obtained in special parameter regimes, we show that information about both the out-of-plane and in-plane g-factors of the dots can be inferred from characteristic features of the magneto-transport curve. For a symmetric DQD, we predict a pronounced maximum in the leakage current at the characteristic out-of-plane magnetic field $B^* = t/ mu_B sqrt{g_z^L g_z^R}$ which we term the g-tensor resonance of the system. Moreover, we extend the results to contain the effects of strong SOI and argue that in this more general case the leakage current carries information about the g-tensor components and SOI of the system.
{"title":"g-tensor resonance in double quantum dots with site-dependent g-tensors","authors":"P. Mutter, G. Burkard","doi":"10.1088/2633-4356/ab9c3a","DOIUrl":"https://doi.org/10.1088/2633-4356/ab9c3a","url":null,"abstract":"Pauli spin blockade (PSB) has long been an important tool for spin read-out in double quantum dot (DQD) systems with interdot tunneling $t$. In this paper we show that the blockade is lifted if the two dots experience distinct effective magnetic fields caused by site-dependent g-tensors $g_L$ and $g_R$ for the left and right dot, and that this effect can be more pronounced than the leakage current due to the spin-orbit interaction (SOI) via spin-flip tunneling and the hyperfine interaction (HFI) of the electron spin with the host nuclear spins. Using analytical results obtained in special parameter regimes, we show that information about both the out-of-plane and in-plane g-factors of the dots can be inferred from characteristic features of the magneto-transport curve. For a symmetric DQD, we predict a pronounced maximum in the leakage current at the characteristic out-of-plane magnetic field $B^* = t/ mu_B sqrt{g_z^L g_z^R}$ which we term the g-tensor resonance of the system. Moreover, we extend the results to contain the effects of strong SOI and argue that in this more general case the leakage current carries information about the g-tensor components and SOI of the system.","PeriodicalId":345750,"journal":{"name":"Materials for Quantum Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125167830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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