Article
Physics, Multidisciplinary
Jason Pye
Summary: Sampling theory is a discipline that deals with reconstructing continuous signals from discrete sets of sample points in communications engineering. It is also relevant in the question of spacetime discreteness at the Planck scale, as sampling theory can be applied to continuous or discrete spaces. There is a proposal to apply this to Minkowski spacetime and this article explores the extension of sampling theory in this context. Additionally, the article discusses how spacetime symmetries are manifested in sampling theory, despite the discreteness of the sampling not being manifestly covariant.
Article
Physics, Particles & Fields
Po-Shen Hsin, Zhu-Xi Luo, Ananth Malladi
Summary: This work investigates the gapped interfaces of 3+1d fracton phases of matter using foliated gauge theories and lattice models. We analyze the gapped boundaries and gapped interfaces in X cube model, and the gapped interfaces between the X-cube model and the toric code. Many new gapped boundaries and interfaces are discovered, some of which are decorated with additional actions.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Multidisciplinary
Alejandro Andres Hnilo, Monica Beatriz Agueero, Marcelo Gregorio Kovalsky
Summary: Quantum mechanics predicts higher correlations between measurements in entangled states than allowed by intuitive concepts, suggesting that nonlinear operators may lead to faster-than-light signaling. A hypothesis suggests that these high quantum correlations only develop after a certain time has passed, and a hidden variables model based on this hypothesis has not been disproved by experiments. A test proposal involving pulsed sources of entangled states and stroboscopic particle detection records is described.
Article
Physics, Multidisciplinary
Charis Anastopoulos, Bei-Lok Hu
Summary: The paper points out three common problems in using quantum information theory to address gravity-related issues, including the inconsistency between interactions mediated by an information channel and those treated by quantum field theory, the neglect of important quantum features when replacing a quantum field with a classical stochastic field, and the conditions under which semi-classical and stochastic theories can be formulated from their quantum origins.
Article
Physics, Multidisciplinary
Stefano Gogioso, Maria E. Stasinou, Bob Coecke
Summary: The paper introduces a compositional algebraic framework to describe the evolution of quantum fields in discretised spacetimes, recovering familiar notions from Relativity and quantum causality purely through the causal order of events. By formulating theory-independent notions of fields and introducing concepts of symmetry and cellular automata, the framework shows potential for new developments in Algebraic Quantum Field Theory, Quantum Cellular Automata, and Quantum Field Theory in general.
FRONTIERS IN PHYSICS
(2021)
Article
Computer Science, Information Systems
Xiaodie Lin, Zhaohui Wei, Penghui Yao
Summary: This paper investigates two-stage hybrid protocols that combine quantum and classical resources to generate classical correlations shared by two separated players. The motivation behind the research is twofold: first, to enhance the capability of quantum schemes when quantum resources are insufficient, extra classical resources can be introduced; second, the paper provides new insights into the advantage of sharing prior quantum entanglement over sharing prior randomness, a fundamental open problem in communication complexity theory.
IEEE TRANSACTIONS ON INFORMATION THEORY
(2022)
Article
Materials Science, Multidisciplinary
Hao Zhang, Cristian D. Batista
Summary: This paper introduces a classical limit of the dynamics of quantum spin systems based on coherent states of SU(N), generalizing the Landau-Lifshitz dynamics from SU(2) to SU(N). This approach provides a better approximation to the exact quantum dynamics for a variety of realistic spin Hamiltonians. Comparing the spin structure factors of an S=1 model obtained with SU(2) and SU(3) classical spin dynamics against the exact solution illustrates the effectiveness of this idea.
Article
Astronomy & Astrophysics
Canxin Shi, Jan Plefka
Summary: This study extends the recently developed worldline quantum field theory (WQFT) formalism to the classical gravitational scattering of massive, charged point particles coupling to biadjoint scalar field theory, Yang-Mills theory, and dilaton-gravity theory. The research establishes a classical double copy relation in these WQFTs for classical observables and computes the eikonal scattering phase to next-to-leading order (NLO) in coupling constants.
Article
Physics, Applied
Kai Wang, Ilaria Vagniluca, Jie Zhang, Soren Forchhammer, Alessandro Zavatta, Jesper B. Christensen, Davide Bacco
Summary: The study proposes an improved quantum key distribution protocol that utilizes time and phase degrees of freedom to expand the dimensionality of the Hilbert space without increasing experimental complexity or relaxing security assumptions. Experimental results show that the protocol can achieve a higher secret key rate in conditions of high quantum bit error rate.
PHYSICAL REVIEW APPLIED
(2021)
Article
Optics
M. Amin, M. A. Walton
Summary: The study shows how to construct a general hybrid quantum-classical bracket and the rules it follows. It is demonstrated that the hybrid bracket will obey the Jacobi identity and the Leibniz rule, as long as the composition product is associative. The proposed scheme suggests that quantum backreaction manifests as quantum-dependent terms in classical equations of motion.
Article
Physics, Multidisciplinary
Zheng-Da Li, Ya-Li Mao, Mirjam Weilenmann, Armin Tavakoli, Hu Chen, Lixin Feng, Sheng-Jun Yang, Marc-Olivier Renou, David Trillo, Thinh P. Le, Nicolas Gisin, Antonio Acin, Miguel Navascues, Zizhu Wang, Jingyun Fan
Summary: This article discusses the debate over the fundamental role of complex numbers in quantum theory and demonstrates the importance of complex numbers in entanglement swapping scenarios through experimental tests. The results show that real quantum theory cannot fully describe the phenomena in these scenarios.
PHYSICAL REVIEW LETTERS
(2022)
Article
History & Philosophy Of Science
Charles T. Sebens
Summary: There is debate over whether quantum field theory is based on fields or particles. This article argues for a field approach and presents three advantages over a particle approach. It also highlights two important tasks facing proponents of a field approach.
Article
Quantum Science & Technology
Saachi Mutreja, Walter O. Krawec
Summary: This paper investigates a mediated semi-quantum key distribution protocol and proposes improvements and extensions to enhance the protocol's efficiency and noise tolerance. The protocol enables the sharing of a secret key among users who have limited quantum abilities, using only the capability to detect or reflect qubits, with the assistance of a quantum server controlled by the adversary.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Engineering, Multidisciplinary
T. S. Jang, H. G. Sung
Summary: A new nonlinear theory for a moving boundary wavemaker of piston-type is presented in this study, which is inherently different from traditional wavemaker theories. The proposed theory was verified through comparison with numerical, experimental, and theoretical results, showing significant agreement. The generated solitary wave by the proposed theory also matched well with the known exact solution.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Engineering, Electrical & Electronic
Ivan Djordjevic
Summary: This paper introduces several low-complexity quantum receivers that outperform previously proposed receivers using optical parametric amplifiers as building blocks. Through simulations, it is demonstrated that the proposed EA schemes with Gaussian modulation and low-complexity joint receivers can significantly outperform both the Holevo capacity and classical homodyne and heterodyne channel capacities.
IEEE PHOTONICS JOURNAL
(2021)
Article
Physics, Multidisciplinary
J. H. Eberly
CONTEMPORARY PHYSICS
(2015)
Article
Optics
Rodrigo Gutierrez-Cuevas, Joseph H. Eberly
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2015)
Article
Optics
J. H. Eberly
Editorial Material
Physics, Multidisciplinary
J. H. Eberly, Xiao-Feng Qian, Asma Al Qasimi, Hazrat Ali, M. A. Alonso, R. Gutierrez-Cuevas, Bethany J. Little, John C. Howell, Tanya Malhotra, A. N. Vamivakas
Article
Physics, Multidisciplinary
Xiao-Feng Qian, Tanya Malhotra, A. Nick Vamivakas, Joseph H. Eberly
PHYSICAL REVIEW LETTERS
(2016)
Editorial Material
Optics
J. H. Eberly
Article
Physics, Multidisciplinary
Justin Tian, Xu Wang, J. H. Eberly
PHYSICAL REVIEW LETTERS
(2017)
Article
Optics
J. H. Eberly, X. -F. Qian, A. N. Vamivakas
Article
Optics
Xu Wang, Justin Tian, J. H. Eberly
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2018)
Article
Physics, Multidisciplinary
Xiao-Feng Qian, Miguel A. Alonso, J. H. Eberly
NEW JOURNAL OF PHYSICS
(2018)
Article
Optics
X. -F. Qian, A. N. Vamivakas, J. H. Eberly
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Optics
P. Scott Carney, Joseph Eberly
Article
Optics
Michael G. Pullen, Benjamin Wolter, Xu Wang, Xiao-Min Tong, Michele Sclafani, Matthias Baudisch, Hugo Pires, Claus Dieter Schroeter, Joachim Ullrich, Thomas Pfeifer, Robert Moshammer, J. H. Eberly, Jens Biegert
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Optics
Miguel A. Alonso, Xiao-Feng Qian, J. H. Eberly
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Optics
Rodrigo Gutierrez-Cuevas, Joseph H. Eberly