F. Benfenati, L. Guidoni, G. Mazzola, P. Barkoutsos, Pauline J. Ollitrault, I. Tavernelli
We extend the class of wavefunctions used within the framework of the Variational Quantum Eigensolver. Testing such extended variational space in simple cases, we achieve high quality wavefunction with reduced circuit depth.
{"title":"Extended wavefunctions for the Variational Quantum Eigensolver","authors":"F. Benfenati, L. Guidoni, G. Mazzola, P. Barkoutsos, Pauline J. Ollitrault, I. Tavernelli","doi":"10.1364/QIM.2019.F5A.36","DOIUrl":"https://doi.org/10.1364/QIM.2019.F5A.36","url":null,"abstract":"We extend the class of wavefunctions used within the framework of the Variational Quantum Eigensolver. Testing such extended variational space in simple cases, we achieve high quality wavefunction with reduced circuit depth.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114264441","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}
We simulate the excitation transport in a noisy quantum network with a weakly radio-frequency coupled atom-field system in the presence of a broadband classical noise. We observe noise-enhanced transport from initial optically-pumped magnetic state to target state, as well as features attributable to the breakdown of the rotating wave approximation and the quantum Zeno effect.
{"title":"Noise-assisted transport through quantum networks using cold atoms","authors":"P. Petrov, A. White, Christopher Gill, V. Boyer","doi":"10.1364/QIM.2019.F5A.77","DOIUrl":"https://doi.org/10.1364/QIM.2019.F5A.77","url":null,"abstract":"We simulate the excitation transport in a noisy quantum network with a weakly radio-frequency coupled atom-field system in the presence of a broadband classical noise. We observe noise-enhanced transport from initial optically-pumped magnetic state to target state, as well as features attributable to the breakdown of the rotating wave approximation and the quantum Zeno effect.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115232548","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}
Jérémy Raskop, N. Corzo, J. Berroir, Aveek Chandra, A. Sheremet, B. Gouraud, J. Laurat
By trapping cold atoms in the evanescent field of an optical nanofiber, we store and reflect guided pulses at the single-photon level. We also herald, store and read out a single waveguide-coupled collective atomic excitation.
{"title":"Quantum optics of cold atomic ensembles trapped in evanescent fields","authors":"Jérémy Raskop, N. Corzo, J. Berroir, Aveek Chandra, A. Sheremet, B. Gouraud, J. Laurat","doi":"10.1364/QIM.2019.F4C.2","DOIUrl":"https://doi.org/10.1364/QIM.2019.F4C.2","url":null,"abstract":"By trapping cold atoms in the evanescent field of an optical nanofiber, we store and reflect guided pulses at the single-photon level. We also herald, store and read out a single waveguide-coupled collective atomic excitation.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131450846","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}
We propose a straightforward experimental test for qubit-environment entanglement generation during qubit pure dephasing. The protocol is implemented using measurements and operations on the qubit only - no measurement of the system-environment state is required.
{"title":"How to detect qubit environment entanglement in pure dephasing evolutions","authors":"K. Roszak, D. Kwiatkowski, Ł. Cywiński","doi":"10.1364/QIM.2019.F5A.5","DOIUrl":"https://doi.org/10.1364/QIM.2019.F5A.5","url":null,"abstract":"We propose a straightforward experimental test for qubit-environment entanglement generation during qubit pure dephasing. The protocol is implemented using measurements and operations on the qubit only - no measurement of the system-environment state is required.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"181 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131277459","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}
G. Thekkadath, D. Phillips, J. Bulmer, W. Clements, A. Eckstein, J. Lugani, C. Wade, T. Wolterink, A. Lita, S. Nam, T. Gerrits, I. Walmsley
We interfere weak coherent states with heralded Fock states on a balanced beam splitter and detect the output with photon-number-resolving detectors. Our setup constitutes a versatile detector that can perform both Gaussian and non-Gaussian measurements.
{"title":"A versatile quantum detector based on homodyne detection with photon-number resolution","authors":"G. Thekkadath, D. Phillips, J. Bulmer, W. Clements, A. Eckstein, J. Lugani, C. Wade, T. Wolterink, A. Lita, S. Nam, T. Gerrits, I. Walmsley","doi":"10.1364/QIM.2019.S4B.3","DOIUrl":"https://doi.org/10.1364/QIM.2019.S4B.3","url":null,"abstract":"We interfere weak coherent states with heralded Fock states on a balanced beam splitter and detect the output with photon-number-resolving detectors. Our setup constitutes a versatile detector that can perform both Gaussian and non-Gaussian measurements.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125687974","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}
M. Kues, C. Reimer, S. Sciara, P. Roztocki, Mehedi Islam, L. R. Cortés, Yanbing Zhang, B. Fischer, S. Loranger, R. Kashyap, A. Cino, S. Chu, B. Little, D. Moss, L. Caspani, W. Munro, J. Azaña, R. Morandotti
By introducing and modifying two-photon hyper-entangled states in the time-frequency domain using an on-chip micro-cavity, we succeed in generating high-dimensional cluster states, demonstrate d-level measurement-based quantum processing and show the state’s higher noise tolerance.
{"title":"High-dimensional one-way quantum processing enabled by optical d-level cluster states","authors":"M. Kues, C. Reimer, S. Sciara, P. Roztocki, Mehedi Islam, L. R. Cortés, Yanbing Zhang, B. Fischer, S. Loranger, R. Kashyap, A. Cino, S. Chu, B. Little, D. Moss, L. Caspani, W. Munro, J. Azaña, R. Morandotti","doi":"10.1364/QIM.2019.S2C.3","DOIUrl":"https://doi.org/10.1364/QIM.2019.S2C.3","url":null,"abstract":"By introducing and modifying two-photon hyper-entangled states in the time-frequency domain using an on-chip micro-cavity, we succeed in generating high-dimensional cluster states, demonstrate d-level measurement-based quantum processing and show the state’s higher noise tolerance.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114639047","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}
S. Hermans, A. Tchebotareva, P. Humphreys, D. Voigt, P. Harmsma, L. Cheng, A. Verlaan, N. Dijkhuizen, W. D. Jong, A. Dréau, R. Hanson
We experimentally demonstrate the preservation of entanglement between an NV spin and a photon upon quantum frequency conversion to the Telecom band. This is a crucial step in realizing long-distance quantum networks.
{"title":"Entanglement between Nitrogen-Vacancy spin in diamond and Telecom frequency photon","authors":"S. Hermans, A. Tchebotareva, P. Humphreys, D. Voigt, P. Harmsma, L. Cheng, A. Verlaan, N. Dijkhuizen, W. D. Jong, A. Dréau, R. Hanson","doi":"10.1364/QIM.2019.S2A.5","DOIUrl":"https://doi.org/10.1364/QIM.2019.S2A.5","url":null,"abstract":"We experimentally demonstrate the preservation of entanglement between an NV spin and a photon upon quantum frequency conversion to the Telecom band. This is a crucial step in realizing long-distance quantum networks.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"51 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116003710","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}
We discuss a novel multi-shear approach to reconstruct the joint spectral phase of two entangled photons. We report on simulations for the phase reconstruction and propose an experiment using a Franson-like modified interferometer.
{"title":"Robust reconstruction of the joint spectral phase of two photons","authors":"I. Gianani","doi":"10.1364/QIM.2019.S1A.4","DOIUrl":"https://doi.org/10.1364/QIM.2019.S1A.4","url":null,"abstract":"We discuss a novel multi-shear approach to reconstruct the joint spectral phase of two entangled photons. We report on simulations for the phase reconstruction and propose an experiment using a Franson-like modified interferometer.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116901588","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}
We demonstrate a frequency-comb single-photon interferometry for quantum spectroscopy and imaging with undetected photons by utilizing both of optical frequency comb technique and quantum erasing mechanism with path-entangled photon pairs.
{"title":"Frequency Comb single photon interferometry for optical measurement with undetected photons","authors":"Sun Kyung Lee, Han Noh Soo, T. Yoon, M. Cho","doi":"10.1364/QIM.2019.F5A.8","DOIUrl":"https://doi.org/10.1364/QIM.2019.F5A.8","url":null,"abstract":"We demonstrate a frequency-comb single-photon interferometry for quantum spectroscopy and imaging with undetected photons by utilizing both of optical frequency comb technique and quantum erasing mechanism with path-entangled photon pairs.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115453388","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}
Based on the temporal ghost imaging with security test, we propose and demonstrate a multi-bit quantum digital signature scheme, in which a multi-bit message can be signed at a time.
{"title":"Multi-bit quantum digital signature based on temporal quantum ghost imaging","authors":"X. Yao, X. Liu, Wei Zhang, Yidong Huang","doi":"10.1364/QIM.2019.T5A.46","DOIUrl":"https://doi.org/10.1364/QIM.2019.T5A.46","url":null,"abstract":"Based on the temporal ghost imaging with security test, we propose and demonstrate a multi-bit quantum digital signature scheme, in which a multi-bit message can be signed at a time.","PeriodicalId":370877,"journal":{"name":"Quantum Information and Measurement (QIM) V: Quantum Technologies","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122798612","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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