Physical Review aPub Date : 2023-08-30DOI: 10.1103/physreva.108.033701
Ji-kun Xie, Shengli Ma, Ya-long Ren, Shaoyan Gao, Fu-li Li
{"title":"Chiral cavity-magnonic system for the unidirectional emission of a tunable squeezed microwave field","authors":"Ji-kun Xie, Shengli Ma, Ya-long Ren, Shaoyan Gao, Fu-li Li","doi":"10.1103/physreva.108.033701","DOIUrl":"https://doi.org/10.1103/physreva.108.033701","url":null,"abstract":"Unidirectional photon emission is crucial for constructing quantum networks and realizing scalable quantum information processing. In the present work an efficient scheme is developed for the unidirectional emission of a tunable squeezed microwave field. Our scheme is based on a chiral cavity magnonic system, where a magnon mode in a single-crystalline yttrium iron garnet (YIG) sphere is selectively coupled to one of the two degenerate rotating microwave modes in a torus-shaped cavity with the same chirality. With the YIG sphere driven by a two-color Floquet field to induce sidebands in the magnon-photon coupling, we show that the unidirectional emission of a tunable squeezed microwave field can be generated via the assistance of the dissipative magnon mode and a waveguide. Moreover, the direction of the proposed one-way emitter can be controlled on demand by reversing the biased magnetic field. Our work opens up an avenue to create and manipulate one-way nonclassical microwave radiation field and could find potential quantum technological applications.","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45226066","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}
Physical Review aPub Date : 2023-08-29DOI: 10.1103/physreva.108.022223
Qingyang Xue, Xu-Cai Zhuang, N. An, De-yang Duan, R. Ma, W. Pan, Qin-Qin Wang, Y. Xia, Z. Man
{"title":"Single- and two-photon wave-particle superpositions: Theory and experiment","authors":"Qingyang Xue, Xu-Cai Zhuang, N. An, De-yang Duan, R. Ma, W. Pan, Qin-Qin Wang, Y. Xia, Z. Man","doi":"10.1103/physreva.108.022223","DOIUrl":"https://doi.org/10.1103/physreva.108.022223","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47870768","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}
Physical Review aPub Date : 2023-08-28DOI: 10.1103/physreva.108.022815
R. Brienza, Y. Lu, C. Wang, S. Kanungo, T. Killian, F. Dunning, J. Burgdörfer, S. Yoshida
{"title":"Microwave spectroscopy of low-l singlet strontium Rydberg states at intermediate n, 50","authors":"R. Brienza, Y. Lu, C. Wang, S. Kanungo, T. Killian, F. Dunning, J. Burgdörfer, S. Yoshida","doi":"10.1103/physreva.108.022815","DOIUrl":"https://doi.org/10.1103/physreva.108.022815","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48480175","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}
Physical Review aPub Date : 2023-08-25DOI: 10.1103/physreva.108.022425
Stefano Guerrini, M. Win, A. Conti
{"title":"Photon-varied quantum states: Unified characterization","authors":"Stefano Guerrini, M. Win, A. Conti","doi":"10.1103/physreva.108.022425","DOIUrl":"https://doi.org/10.1103/physreva.108.022425","url":null,"abstract":"This paper introduces photon-varied quantum states (PVQSs), which generalize the nonclassical states obtained via photon addition or subtraction operations. We provide a unified characterization of PVQSs in terms of characteristic function, quasiprobability distribution, Fock representation, and Mandel Q parameter. In the special case of photon-varied Gaussian states (PVGSs), the characteristic functions and the quasiprobability distributions are found to be in a simple canonical product structure. Necessary and sufficient conditions for the negativity of the quasiprobability distributions are also obtained for PVGSs. The unified characterization enables the design and analysis of quantum systems that exploit the non-Gaussian properties of PVQSs.","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43201682","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}
Physical Review aPub Date : 2023-08-25DOI: 10.1103/physreva.108.023522
P. Brandão
{"title":"Ability of loss to increase the spatial coherence of guided waves","authors":"P. Brandão","doi":"10.1103/physreva.108.023522","DOIUrl":"https://doi.org/10.1103/physreva.108.023522","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48707020","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}
Physical Review aPub Date : 2023-08-24DOI: 10.1103/PhysRevA.108.L021502
Haowei Xu, Hao Tang, Guoqing Wang, Changhao Li, Boning Li, P. Cappellaro, Ju Li
{"title":"Solid-state Th229 nuclear laser with two-photon pumping","authors":"Haowei Xu, Hao Tang, Guoqing Wang, Changhao Li, Boning Li, P. Cappellaro, Ju Li","doi":"10.1103/PhysRevA.108.L021502","DOIUrl":"https://doi.org/10.1103/PhysRevA.108.L021502","url":null,"abstract":"The radiative excitation of the 8.3 eV isomeric state of thorium-229 is an outstanding challenge due to the lack of tunable far-ultraviolet (F-UV) sources. In this work, we propose an efficient two-photon pumping scheme for thorium-229 using the optonuclear quadrupolar effect, which only requires a 300 nm UV-B pumping laser. We further demonstrate that population inversion between the nuclear isomeric and ground states can be achieved at room temperature using a two-step pumping process. The nuclear laser, which has been pursued for decades, may be realized using a Watt-level UV-B pumping laser and ultrawide bandgap thorium compounds (e.g., $rm ThF_4$, $rm Na_2ThF_6$, or $rm K_2ThF_6$) as the gain medium.","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44101848","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}
Physical Review aPub Date : 2023-08-24DOI: 10.1103/physreva.108.029902
Scott M. Cohen
{"title":"Erratum: Local approximation for perfect discrimination of quantum states [Phys. Rev. A \u0000107\u0000, 012401 (2023)]","authors":"Scott M. Cohen","doi":"10.1103/physreva.108.029902","DOIUrl":"https://doi.org/10.1103/physreva.108.029902","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42894331","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}