Non-Gaussian entanglement criteria for atomic homodyne detection
File(s)
Published version
Author(s)
Lee, Jaehak
Park, Jiyong
Kim, Jaewan
Kim, MS
Nha, Hyunchul
Type
Journal Article
Abstract
Homodyne measurement is a crucial tool widely used to address continuous variables for bosonic quantum systems. While an ideal homodyne detection provides a powerful analysis, e.g., to effectively measure quadrature amplitudes of light in quantum optics, it relies on the use of a strong reference field, the so-called local oscillator, typically in a coherent state. Such a strong coherent local oscillator may not be readily available, particularly for a massive quantum system like a Bose-Einstein condensate, posing a substantial challenge in dealing with continuous variables appropriately. It is necessary to establish a practical framework that includes the effects of nonideal local oscillators for a rigorous assessment of various quantum tests and applications. We here develop entanglement criteria beyond a Gaussian regime applicable for this realistic homodyne measurement that do not require assumptions on the state of local oscillators. We discuss the working conditions of homodyne detection to effectively detect non-Gaussian quantum entanglement under various states of local oscillators.
Date Issued
2023-02
Date Acceptance
2023-01-27
Citation
Physical Review A, 2023, 107 (2)
ISSN
2469-9926
Publisher
American Physical Society
Journal / Book Title
Physical Review A
Volume
107
Issue
2
Copyright Statement
©2023 American Physical Society
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000934032600003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
INTERFEROMETRY
Optics
Physical Sciences
Physics
Physics, Atomic, Molecular & Chemical
QUANTUM
Science & Technology
Publication Status
Published
Article Number
022423
Date Publish Online
2023-02-14