Article
Optics
Weidong Li, Shuyuan Wu, Augusto Smerzi, Luca Pezze
Summary: The study proposes a strategy to improve the stability of atomic clocks by interrogating two atomic ensembles sharing the same local oscillator (LO), resulting in a relaxed restriction of the Ramsey time and improvement of absolute clock stability.
Article
Neurosciences
Xihe Xie, Chang Cai, Pablo F. Damasceno, Srikantan S. Nagarajan, Ashish Raj
Summary: This study investigates how functional brain networks emerge from the underlying wiring of the brain by introducing signal transmission delays in white matter fibers. The complex Laplacian matrix, dependent on coupling strength and oscillation frequency, can predict canonical functional networks without detailed neural activity modeling. Linear superposition of complex eigenmodes can predict specific functional networks and outperforms real-valued Laplacian in predicting functional networks.
Article
Chemistry, Physical
Amin Bakhshandeh, Yan Levin
Summary: This paper discusses the problems associated with the notion of pH in heterogeneous systems. While standardization protocols lead to a well-defined quantity for homogeneous systems, pH defined in terms of the chemical part of the electrochemical activity is thermodynamically inconsistent for heterogeneous systems. This problem is particularly relevant for modern simulation methods involving charge regulation of various substances.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Physics, Multidisciplinary
Wei Qin, Adam Miranowicz, Hui Jing, Franco Nori
Summary: This study proposes creating and stabilizing long-lived macroscopic quantum superposition states in atomic ensembles. By using a fully quantum parametric amplifier, stabilized atomic Schrodinger cat states with remarkably long lifetime have been successfully generated, opening up a new pathway towards generating large-size and long-lived cat states with immediate interests in fundamental studies and noise-immune quantum technologies.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Haridas Umpierrez, Sergio Davis
Summary: Generalizations of statistical mechanics such as Tsallis statistics and superstatistics explain power-law distributions in long-range interacting systems and complex systems. This study utilizes fluctuation theorems for q-canonical ensembles to determine strong conditions for the possible values of q.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Optics
Maria Violaris, Gaurav Bhole, Jonathan A. Jones, Vlatko Vedral, Chiara Marletto
Summary: An implementation of a finite quantum homogenizer using nuclear magnetic resonance (NMR) with a four-qubit system is presented. Experimental results are consistent with the theoretical symmetry in qubit state evolution, revealing the physical significance of the homogenizer for pure state preparation and information scrambling.
Article
Quantum Science & Technology
Giuseppe Vitagliano, Matteo Fadel, Iagoba Apellaniz, Matthias Kleinmann, Bernd Lucke, Carsten Klempt, Geza Toth
Summary: This article presents a method to detect bipartite entanglement using number-phase-like uncertainty relations in split spin ensembles. An uncertainty relation is derived for spin systems, which allows for the detection of bipartite entanglement in an unpolarized Dicke state of many spin1/2 particles. The method involves splitting the particles into two subensembles and conducting collective angular momentum measurements locally on each part.
Article
Physics, Multidisciplinary
Matteo Fadel, Ayaka Usui, Marcus Huber, Nicolai Friis, Giuseppe Vitagliano
Summary: This method offers a practical way to measure entanglement in experiments, especially in situations with limited observable measurements, such as quantifying entanglement using measurements of the first and second moments of the collective spin operator.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
B. G. Divyamani, I. Reena, Prasanta K. Panigrahi, A. R. Usha Devi, Sudha
Summary: The quantum steering ellipsoid formalism accurately represents two-qubit states and is useful for studying their correlation properties. This study focuses on the steering ellipsoids of permutation-symmetric N-qubit states. The geometry of the canonical steering ellipsoids of pure permutation-symmetric N-qubit states with two distinct spinors is analyzed, revealing several families that cannot be converted into each other through stochastic local operations and classical communication. These families allow for a geometric visualization of the SLOCC-equivalent class of states.
Article
Physics, Multidisciplinary
Sebastian Gemsheim, Jan M. Rost
Summary: This study derives the time-dependent Schrodinger equation for a system from the energy eigenstate of the total Hamiltonian consisting of the system, environment, and their interaction, providing strong support for the relational concept of time.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Ceramics
Bharti, Gulzar Ahmed, Yogesh Kumar, Shatendra Sharma
Summary: Density functional theory calculations were used to investigate the density of states and quantum capacitance of pure and doped niobium nitrides. The results show that NbN is a promising candidate for supercapacitor electrodes, and doping with cobalt can significantly increase the quantum capacitance.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Multidisciplinary
Daniel A. Paz, Mohammad F. Maghrebi
Summary: Fluctuation-dissipation relations (FDRs) and time-reversal symmetry (TRS) are broken even at or near criticality in driven-dissipative systems, despite a modified form of FDR and TRS still holding. This has drastic consequences for correlation and response functions as well as Onsager reciprocity relations. At criticality, TRS remains broken even in the weakly-dissipative limit.
Article
Chemistry, Physical
Rishabh Gupta, Raphael D. Levine, Sabre Kais
Summary: Significant progress has been made in studying the technological applications of various types of quantum systems, with industry giants like IBM aiming to develop scalable quantum devices with over 1000 qubits by the end of 2023. Efficient techniques for testing quantum processing are being developed, with incomplete measurements suitable for characterizing noisy intermediate-scale quantum devices.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Physics, Multidisciplinary
Ginestra Bianconi
Summary: Maximum entropy network ensembles have been effective in modeling and solving inference problems in sparse network topologies. However, existing models have limitations which have been addressed by proposing hierarchical models for exchangeable networks that can handle fixed or arbitrary number of nodes in a grand canonical approach.
Article
Physics, Multidisciplinary
Kentaro Kato
Summary: This article investigates the quantum mechanical nature of large-scale M-ary optical signals in modern optical communication technology. It proposes a non-orthogonality index based on quantum detection theory and applies it to coherent state signals. The results show that coherent state signals exhibit quantum properties even at high signal transmission power.
Article
Physics, Multidisciplinary
Jaeyoon Cho
NEW JOURNAL OF PHYSICS
(2015)
Article
Physics, Multidisciplinary
Sun Kyung Lee, Jaeyoon Cho, K. S. Choi
NEW JOURNAL OF PHYSICS
(2015)
Article
Optics
Jaeyoon Cho, Sougato Bose, M. S. Kim
OPTICS COMMUNICATIONS
(2015)
Article
Physics, Multidisciplinary
Jaeyoon Cho
Article
Optics
Sang Min Lee, Hee Su Park, Jaeyoon Cho, Yoonshik Kang, Jae Yong Lee, Heonoh Kim, Dong-Hoon Lee, Sang-Kyung Choi
Article
Optics
Daniel Ballester, Jaeyoon Cho, M. S. Kim
Article
Physics, Multidisciplinary
Jaeyoon Cho, M. S. Kim
PHYSICAL REVIEW LETTERS
(2011)
Article
Physics, Multidisciplinary
Jaeyoon Cho, Sougato Bose, M. S. Kim
PHYSICAL REVIEW LETTERS
(2011)
Article
Physics, Multidisciplinary
Jaeyoon Cho
PHYSICAL REVIEW LETTERS
(2014)
Article
Multidisciplinary Sciences
Jaeyoon Cho, Kun Woo Kim
SCIENTIFIC REPORTS
(2017)
Article
Physics, Mathematical
Zhongtao Mei, Jaeyoon Cho
JOURNAL OF STATISTICAL PHYSICS
(2019)
Article
Materials Science, Multidisciplinary
Yang Zhao, Rajesh Narayanan, Jaeyoon Cho
Article
Optics
Chae-Yeun Park, Jaeyoon Cho
Article
Astronomy & Astrophysics
Ki-Seok Kim, Miok Park, Jaeyoon Cho, Chanyong Park