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Symmetry
Special Issues
Quantum Optics and Symmetry
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Quantum Optics and Symmetry

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 966

Special Issue Editors

Dr. Hongbo Zhang

E-Mail Website
Guest Editor
Department of Engineering Technology, Middle Tennessee State University, 1301 E Main St., Murfreesboro, TN 37132, USA
Interests: digital holography; microscopy; X-ray laser
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Aimin Yan

E-Mail Website
Guest Editor
College of Mathematics and Science, Shanghai Normal University, Shanghai 200234, China
Interests: information optics; laser 3D imaging and image encryption

Special Issue Information

Dear Colleagues,

Quantum optics studies individual quanta of light. In this Special Issue, we call for research in the areas of quantum mechanics including entanglement and teleportation, quantum memory, and quantum information processing. Quantum imaging and quantum neural networks for learning-based image recognition are also of interest in this special issue. Quantum optical encryption, quantum nano-optics, and quantum optical information processing are particularly welcomed.

Quantum symmetry is also a topic of interest in this Special Issue, as well as group theory and symmetry of quantum electrodynamics. New insights connecting symmetry and quantum mechanics are especially welcomed.

Dr. Hongbo Zhang
Prof. Dr. Aimin Yan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • quantum optics
  • quantum neural network
  • quantum optical information processing
  • quantum symmetry

Published Papers (1 paper)

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Research

12 pages, 504 KiB  
Article
Phase Diffusion Mitigation in the Truncated Mach–Zehnder Interferometer
by Quan Liao, Hongmei Ma, Liqing Chen, Weiping Zhang and Chun-Hua Yuan
Symmetry 2024, 16(2), 187; https://doi.org/10.3390/sym16020187 - 05 Feb 2024
Viewed by 574
Abstract
The presence of phase diffusion noise may lead to the loss of quantum measurement advantages, resulting in measurement results that cannot beat the standard quantum limit (SQL). Squeezing is considered an effective method for reducing the detrimental effect of phase diffusion on a [...] Read more.
The presence of phase diffusion noise may lead to the loss of quantum measurement advantages, resulting in measurement results that cannot beat the standard quantum limit (SQL). Squeezing is considered an effective method for reducing the detrimental effect of phase diffusion on a measurement. Reasonable use of squeezing can make a measurement exceed the SQL. The Mach–Zehnder (MZ) interferometer has been exploited as a generic tool for precise phase measurement. Describing the reduction in quantum advantage caused by phase diffusion in an MZ interferometer that can be mitigated by squeezing is not easy to handle analytically because the input state changes from a pure state to a mixed state after experiencing the diffusion noise in the MZ interferometer. We introduce a truncated MZ interferometer, a symmetrical structure that can achieve the same potential phase sensitivity as the conventional MZ interferometer. This scheme can theoretically explain how phase diffusion reduces phase estimation and why squeezing counteracts the presence of phase diffusion. Using the Gaussian property of the input state and the characteristic of Gaussian operation in the squeezing, the two orthogonal field quantities of the quantum state are squeezed and anti-squeezed to different degrees, and the analytic results are obtained. This result can beat the SQL and provide reliable theoretical guidance for the experiment. The truncated MZ interferometer is more straightforward to build and operate than the conventional MZ interferometer. Moreover, it mitigates the phase diffusion noise via the squeezing operation, thus making it useful for applications in quantum metrology. Full article
(This article belongs to the Special Issue Quantum Optics and Symmetry)
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