Quantum Optics and Quantum Information

A special issue of Atoms (ISSN 2218-2004).

Deadline for manuscript submissions: closed (31 March 2026) | Viewed by 1476

Special Issue Editors


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Guest Editor
Department of Chemistry, University of Rochester, Rochester, NY, USA
Interests: ultrafast spectroscopy; fluorescence; photochemistry

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Guest Editor
The Landes Research Group, University of Illinois at Urbana-Champaign, Champaign, IL, USA
Interests: single-particle-level spectroscopic and microscopic study of nanoparticles

Special Issue Information

Dear Colleagues,

Quantum optics and quantum information research are interdisciplinary fields that explore the intersection of quantum mechanics with the behavior of light and its potential applications in computing and communication technologies. Phenomena such as entanglement, superposition, and quantum coherence in light–matter interactions are frequently studied using photons as carriers of quantum information. This research has led to the development of advanced technologies such as quantum cryptography, quantum sensors, and quantum imaging. Quantum information focuses on how quantum systems can be used to process and store information in ways that classical systems cannot, such as in quantum computing, where qubits allow for exponentially faster problem-solving. Together, these fields aim to harness the unique properties of quantum systems to revolutionize communication security, computation, and fundamental understanding of quantum mechanics.

In this Special Issue, we will be happy to consider original research articles, perspectives and reviews.  The aim of this Special Issue is to provide insights into the current activities related to the unique properties of quantum systems including but not limited to quantum entanglement, quantum imaging, quantum communications or any fundamental progress made in the quantum optics field.

Dr. Apurba De
Dr. Tasnim Ahmed
Guest Editors

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Keywords

  • quantum entanglement
  • quantum computing
  • qubits
  • quantum cryptography coherence
  • quantum communications
  • quantum imaging

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Published Papers (1 paper)

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Review

24 pages, 1742 KB  
Review
Quantum Encryption in Phase Space
by Randy Kuang
Atoms 2026, 14(3), 23; https://doi.org/10.3390/atoms14030023 - 11 Mar 2026
Viewed by 710
Abstract
Quantum Encryption in Phase Space (QEPS) is a physical-layer encryption framework that harnesses the quantum-mechanical properties of coherent states to secure optical communications against both classical and quantum computational threats. By applying randomized phase shifts, displacements, or their dynamic combinations—implemented as unitary transformations [...] Read more.
Quantum Encryption in Phase Space (QEPS) is a physical-layer encryption framework that harnesses the quantum-mechanical properties of coherent states to secure optical communications against both classical and quantum computational threats. By applying randomized phase shifts, displacements, or their dynamic combinations—implemented as unitary transformations in phase space—QEPS disrupts the phase reference essential for coherent detection, establishing aphase synchronization barrier. This review synthesizes the theoretical foundations, security mechanisms, and experimental progress of the QEPS framework, encompassing its three principal variants: the round-trip Quantum Public Key Envelope (QPKE) protocol—a public-key-like scheme built upon phase randomization (QEPS-p), the symmetric phase-only QEPS-p, and the displacement-based QEPS-d. Experimental validations demonstrate that authorized users achieve bit-error rates (BERs) below the forward-error-correction threshold, whereas eavesdroppers are confined to BERs near 50%, equivalent to random guessing—all while utilizing standard coherent optical transceivers at data rates up to 200 Gb/s over 80 km of fiber. We further examine QEPS’s robustness to channel impairments, its seamless compatibility with existing digital signal processing (DSP) pipelines, and its distinctive position within the post-quantum cryptography landscape. Finally, we outline key challenges and future research directions toward deploying QEPS as a practical, quantum-resistant security layer for next-generation optical networks. Full article
(This article belongs to the Special Issue Quantum Optics and Quantum Information)
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