Fabrizio Sgobba, Danilo Triggiani, Vincenzo Tamma, Paolo De Natale, Gianluca Gagliardi, Saverio Avino, Luigi Santamaria Amato
{"title":"Zeptosecond-Scale Single-Photon Gyroscope","authors":"Fabrizio Sgobba, Danilo Triggiani, Vincenzo Tamma, Paolo De Natale, Gianluca Gagliardi, Saverio Avino, Luigi Santamaria Amato","doi":"10.1002/qute.202400166","DOIUrl":null,"url":null,"abstract":"<p>This work presents an all-fiber telecom-range optical gyroscope employing a spontaneous parametric down conversion crystal to produce ultra-low intensity thermal light by tracing-out one of the heralded photons. The prototype exhibits a detection limit on photon delay measurements of 249 zs over a 72 s averaging time and 26 zs in differential delay measurements at <span></span><math>\n <semantics>\n <mrow>\n <mi>t</mi>\n <mo>=</mo>\n <msup>\n <mn>10</mn>\n <mn>4</mn>\n </msup>\n </mrow>\n <annotation>$t=10^4$</annotation>\n </semantics></math> s averaging. The detection scheme proves to be the most resource-efficient possible, saturating <span></span><math>\n <semantics>\n <mrow>\n <mo>></mo>\n <mn>99.5</mn>\n <mo>%</mo>\n </mrow>\n <annotation>$&gt;99.5\\%$</annotation>\n </semantics></math> of the Cramér–Rao bound. These results are groundbreaking in the context of low-photon regime quantum metrology, paving the way to novel experimental configurations to bridge quantum optics with special or general relativity.</p>","PeriodicalId":72073,"journal":{"name":"Advanced quantum technologies","volume":"7 9","pages":""},"PeriodicalIF":4.4000,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/qute.202400166","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced quantum technologies","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/qute.202400166","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
This work presents an all-fiber telecom-range optical gyroscope employing a spontaneous parametric down conversion crystal to produce ultra-low intensity thermal light by tracing-out one of the heralded photons. The prototype exhibits a detection limit on photon delay measurements of 249 zs over a 72 s averaging time and 26 zs in differential delay measurements at s averaging. The detection scheme proves to be the most resource-efficient possible, saturating of the Cramér–Rao bound. These results are groundbreaking in the context of low-photon regime quantum metrology, paving the way to novel experimental configurations to bridge quantum optics with special or general relativity.