Article
Astronomy & Astrophysics
A. E. Bernardini, O. Bertolami
Summary: The existence of time crystals, which explains the unexpected non-stationary behavior of quantum observables in the ground state, requires a spontaneous breakdown of the continuous time translation symmetry. This study argues that such effects emerge from the noncommutativity of position and/or momentum and presents a predictive analysis of the two-dimensional noncommutative quantum harmonic oscillator using the Weyl-Wigner-Groenewold-Moyal framework. The analysis shows how the phase-space noncommutativity drives the amplitude of periodic oscillations identified as time crystals.
Article
Crystallography
Christopher Sims
Summary: The engineering of new states of matter through Floquet driving has revolutionized the field of condensed matter physics. This paper extends the model of discrete time crystals to study the time translational symmetry in pseudo-higher-dimensional lattice systems.
Article
Materials Science, Multidisciplinary
Roman Forker, Torsten Fritz
Summary: This article critically examines the assignment method of epitaxy types proposed by Wang et al., and identifies systematic errors in their strain calculations for C60 monolayers.
Editorial Material
Physics, Multidisciplinary
Flavio Del Santo, Sebastian Horvat
Summary: Dragan and Ekert claim that fundamental properties of quantum physics can be derived from relativistic considerations if one considers superluminal reference frames. However, we argue in this comment that their arguments are flawed and their claims are unwarranted.
NEW JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Subhajit Sarkar, Yonatan Dubi
Summary: Periodically driven open quantum systems that never thermalize exhibit a discrete time-crystal behavior, which has potential applications in quantum information processing. Current measurements of time-crystallinity are limited to optical and spin experiments. In this study, we propose a direct measurement method using charge currents in a spin-less Hubbard ladder and demonstrate the robustness of the time-crystal phase against external influences. These findings motivate further theoretical and experimental efforts to simulate time-crystal phenomena in nanoscale systems driven by currents.
Editorial Material
Physics, Multidisciplinary
Andrzej Grudka, Antoni Wojcik
Summary: This paper discusses the recent research by Dragan and Ekert, who argue that the probabilistic dynamics in quantum physics is related to the propagation of superluminal particles. However, the paper shows that the proposed extension of the Lorentz transformation can be interpreted in a natural way without invoking superluminal phenomena.
NEW JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Raditya Weda Bomantara
Summary: Discrete time crystals (DTCs) are nonequilibrium phases of matter with unique observable dynamics in response to periodic drive. While current experiments are limited to period-doubling and period-tripling observable dynamics, creating larger periodic DTCs remains a challenge, but can be achieved through quantum error correction.
Editorial Material
Physics, Multidisciplinary
A. J. Bracken, G. F. Melloy
Summary: Critiques and a proposal from Bialynicki-Birula et al in their recent paper "Backflow in relativistic wave equations" (2022) have been addressed. It reiterates that the widely debated quantum probability backflow phenomenon does not have a classical counterpart. It is noted that the backflow in the relativistic Dirac Equation has been extensively examined by us and others in the past.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Optics
Bing Wang, Jiaqi Quan, Jianfei Han, Xiaopeng Shen, Hongwei Wu, Yiming Pan
Summary: This study synthesizes a photonic material of topological Floquet time crystals and experimentally observes its indicative period-2T beating. A single-particle picture is explicitly reconstructed of discrete time-crystalline phase and is revealed using an appropriately-designed photonic Floquet simulator the rigid period-doubling as a signature of the breakage of the discrete time-translational symmetry. The photonic Floquet time crystal is derived from a newly defined single-particle topological phase that can be extensively accessed by many pertinent nonequilibrium and periodically-driven platforms.
LASER & PHOTONICS REVIEWS
(2022)
Review
Chemistry, Physical
Bhoomi S. Shah, Jolly B. Raval, Deepak Kumar, Sunil H. Chaki, M. P. Deshpande
Summary: This review provides an overview of CuFeS2 (CFS) compound and discusses its different forms such as single crystals, thin films, nanoparticles, and quantum dots. It explores the growth methods of CFS crystals and highlights the potential of doping. The deposition of CFS thin films and their application in solar cell fabrication are discussed. The enhanced properties of CFS nanoparticles and nanocrystals synthesized under different conditions are presented, along with the emerging materials of CFS quantum dots. The potential applications of CFS in photovoltaics, photocatalysis, biomedicines, biosensors, and power storage are also covered.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Quantum Science & Technology
Zhi-Hao Liu, Han-Wu Chen
Summary: The novel quantum dialogue protocol using three-qubit GHZ states was cryptanalyzed and a leakage problem was found. Specifically, half of the secret messages exchanged unconsciously leaked out. A discussion on improving the protocol followed.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Quantum Science & Technology
Rebekah Herrman, Thomas G. Wong
Summary: This paper investigates the simplification methods of quantum walks on dynamic graphs, proposes six scenarios for graph simplification, and provides examples of how to simplify dynamic graphs to achieve parallel single-qubit gates.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Physics, Multidisciplinary
Piotr Zawadzki
Summary: This study investigates the security implications of utilizing the concept of entanglement in time in the quantum representation of a blockchain data structure. The analysis reveals an uncertain interpretation of experimental results underlying this representation. By adopting the Copenhagen interpretation, the observed correlations in the experiment can be explained without invoking the concept of entanglement in time.
Article
Chemistry, Physical
Arpan Kundu, Giulia Galli
Summary: We study the influence of nuclear quantum motion and anharmonicity on the electronic properties of molecular crystals. The effect of zero-point renormalization (ZPR) on band gaps is found to be significant, especially for diamondoid crystal (0.6 eV) compared to NAI-DMAC (0.22 eV). The approximation of frozen phonon (FP) neglecting intermolecular anharmonic effects leads to a large error in ZPR calculation, while a stochastic method shows good agreement with quantum simulations for diamondoid crystal but worse agreement for NAI-DMAC due to intramolecular anharmonicities. Our results highlight the importance of accurately considering nuclear and anharmonic quantum effects in predicting the electronic properties of molecular crystals.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Quantum Science & Technology
Allan Wing-Bocanegra, Salvador E. Venegas-Andraca
Summary: This work examines the unitary evolution operator of Unitary Coined Discrete-Time Quantum Walks (UCDTQW) and relates it to the adjacency matrix of a graph. Transformation equations are provided to convert between the two, resulting in a directed multigraph. Any adjacency matrix that satisfies the transformation equations will automatically be associated with a quantum circuit. Additionally, the definition of the coin operator is extended to handle different vertices in the directed multigraph, with a description of its implementation in circuit form.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Astronomy & Astrophysics
Jacques Villain, Mireille Lavagna, Patrick Bruno
COMPTES RENDUS PHYSIQUE
(2016)
Article
Materials Science, Multidisciplinary
C. Lacroix, M. Taillefumier, V. K. Dugaev, B. Canals, P. Bruno
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2009)
Article
Materials Science, Multidisciplinary
Pawel Buczek, Arthur Ernst, Leonid Sandratskii, Patrick Bruno
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2010)
Article
Optics
G. Metalidis, P. Bruno
Article
Materials Science, Multidisciplinary
B. W. Heinrich, C. Iacovita, M. V. Rastei, L. Limot, J. P. Bucher, P. A. Ignatiev, V. S. Stepanyuk, P. Bruno
Article
Materials Science, Multidisciplinary
I. V. Maznichenko, A. Ernst, M. Bouhassoune, J. Henk, M. Daene, M. Lueders, P. Bruno, W. Hergert, I. Mertig, Z. Szotek, W. M. Temmerman
Article
Materials Science, Multidisciplinary
M. Taillefumier, V. K. Dugaev, B. Canals, C. Lacroix, P. Bruno
Article
Materials Science, Multidisciplinary
Y. O. Kvashnin, S. Khmelevskyi, J. Kudrnovsky, A. N. Yaresko, L. Genovese, P. Bruno
Article
Materials Science, Multidisciplinary
R. Torchio, Y. O. Kvashnin, C. Marini, O. Mathon, G. Garbarino, M. Mezouar, J. P. Wright, P. Bruno, L. Genovese, F. Baudelet, C. Meneghini, S. Mobilio, N. A. Morley, M. R. J. Gibbs, S. Pascarelli
Article
Physics, Multidisciplinary
R. Torchio, Y. O. Kvashnin, S. Pascarelli, O. Mathon, C. Marini, L. Genovese, P. Bruno, G. Garbarino, A. Dewaele, F. Occelli, P. Loubeyre
PHYSICAL REVIEW LETTERS
(2011)
Article
Physics, Multidisciplinary
Patrick Bruno
PHYSICAL REVIEW LETTERS
(2012)
Editorial Material
Physics, Multidisciplinary
Patrick Bruno
PHYSICAL REVIEW LETTERS
(2013)
Article
Physics, Multidisciplinary
Patrick Bruno
PHYSICAL REVIEW LETTERS
(2013)
Article
Materials Science, Multidisciplinary
R. Torchio, C. Marini, Y. O. Kvashnin, I. Kantor, O. Mathon, G. Garbarino, C. Meneghini, S. Anzellini, F. Occelli, P. Bruno, A. Dewaele, S. Pascarelli
