物理与天体物理最新文献_第3页

Non-Markovian dynamics of open quantum systems in squeezed thermal baths

IF 2.2 3区物理与天体物理

Quantum Information Processing Pub Date : 2025-04-01 DOI: 10.1007/s11128-025-04721-w

Arapat Ablimit, Ahmad Abliz, Yu-Sui Chen, Zhao-Ming Wang

{"title":"Non-Markovian dynamics of open quantum systems in squeezed thermal baths","authors":"Arapat Ablimit, Ahmad Abliz, Yu-Sui Chen, Zhao-Ming Wang","doi":"10.1007/s11128-025-04721-w","DOIUrl":"10.1007/s11128-025-04721-w","url":null,"abstract":"<div>The quantum state diffusion (QSD) equation technique has been used to effectively deal with the dynamics of the open quantum systems. Normally, the initial states of the baths are taken as vacuum states. In this paper, we use the squeezed vacuum states of the baths as the initial states. Then, the squeezing parameters are naturally introduced to the non-Markovian dynamics of the system. By using the QSD equation technique, a non-Markovian master equation in squeezed thermal baths has been derived under the weak system-bath coupling, high-temperature approximation. The dynamics of the systems can be numerically calculated by the master equation together with a group of closed (overline{O})((overline{Q})) operator equation. Taking a single and two-qubit coupled with the squeezed bath as examples, the dynamics of the spin state (leftlangle sigma _{z}rightrangle ) or correlation (leftlangle sigma _{z}^{A}sigma _{z}^{B}rightrangle ) are numerically calculated. The effects of the squeezing and memory effects on the dynamics are analyzed. For both models, big p-quadrature squeezing or long memory time (strong non-Markovianity) of the baths corresponds to big values of (leftlangle sigma _{z}rightrangle ) or (leftlangle sigma _{z}^{A}sigma _{z}^{B}rightrangle ). When the squeezing strength is zero, the correlation functions go back to the vacuum initial state cases. The developed technique in this paper provides an effective approach to analyze the impact of multiple parameters on the systems in squeezed thermal baths.</div>","PeriodicalId":746,"journal":{"name":"Quantum Information Processing","volume":"24 4","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Selenium, Copper and Silver Microparticles Obtained in Viscous Media on the Gram-Positive and Gram-Negative Bacteria Survival

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-01 DOI: 10.1134/S0021364024605190

I. N. Saraeva, E. R. Tolordava, R. A. Khmelnitsky, S. N. Shelygina, D. S. Pozdnyakova, A. A. Nastulyavichus, E. N. Rimskaya, A. E. Rupasov

{"title":"Effect of Selenium, Copper and Silver Microparticles Obtained in Viscous Media on the Gram-Positive and Gram-Negative Bacteria Survival","authors":"I. N. Saraeva, E. R. Tolordava, R. A. Khmelnitsky, S. N. Shelygina, D. S. Pozdnyakova, A. A. Nastulyavichus, E. N. Rimskaya, A. E. Rupasov","doi":"10.1134/S0021364024605190","DOIUrl":"10.1134/S0021364024605190","url":null,"abstract":"The work presents a multiparametric analysis of the effect of antibacterial nanogels based on nano- and (sub)microparticles of silver, copper and selenium on single- and multicomponent biofilms of gram-positive bacteria Staphylococcus aureus, Staphylococcus epidermidis, as well as gram-negative bacteria Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa. Nanogels are based on glycerol, silicone oil and Vaseline, which are low-costing biocompatible materials, suitable for use in wound dressings. The active components are bactericidal Ag, Cu, and Se nanoparticles. Nanogels and their effect on the bacterial biofilms were studied by standard microbiological inoculations, as well as Fourier transform infrared spectroscopy methods, followed by principal component analysis. After the treatment of biofilms with nanogels, a decrease in the bacterial population up to 99% was observed. Principal component analysis demonstrated the ability to differentiate viable from nonviable bacteria.","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 4","pages":"306 - 314"},"PeriodicalIF":1.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024605190.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability Analysis of Spectral Technique for Three-Connected Fractional Stochastic Integro-Delay Differential Systems

IF 1.3 4区物理与天体物理

International Journal of Theoretical Physics Pub Date : 2025-04-01 DOI: 10.1007/s10773-025-05969-9

Shuo Li, Sami Ullah Khan, Kangning Yu, Emad A. A. Ismail, Fuad A. Awwad

引用次数: 0

Gyroscopic precession in Reissner–Nordström spacetime

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2025-04-01 DOI: 10.1007/s10714-025-03395-0

Paulami Majumder, K. Rajesh Nayak

引用次数: 0

Nonlinear massive gravity theory of geometric origin

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-04-01 DOI: 10.1103/physrevd.111.084001

Thibault Damour, Tamanna Jain

引用次数: 0

Quantum work extraction of a moving battery as a witness to Unruh thermality in high-dimensional spacetimes

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-04-01 DOI: 10.1103/physrevd.111.065028

Yan Chen, Wei-Wei Zhang, Tian-Xi Ren, Xiang Hao

{"title":"Quantum work extraction of a moving battery as a witness to Unruh thermality in high-dimensional spacetimes","authors":"Yan Chen, Wei-Wei Zhang, Tian-Xi Ren, Xiang Hao","doi":"10.1103/physrevd.111.065028","DOIUrl":"https://doi.org/10.1103/physrevd.111.065028","url":null,"abstract":"We put forward a physical model of a uniformly accelerated Unruh-DeWitt battery and use quantum work extraction as a probe to witness the thermal nature of the Unruh effect in a high dimensional Minkowski spacetime. By means of the open quantum system approach, we investigate the maximal amount of quantum work extraction with respect to the acceleration-induced Unruh temperature, spacetime dimensionality, and field mass. It has been found that the steady amount of quantum work extraction in the asymptotic condition is just determined by the Unruh temperature in arbitrary dimensional spacetimes. The asymptotic behavior can demonstrate the global feature of Unruh thermality dependent on the Kubo-Martin-Schwinger condition. From a local viewpoint of the Unruh effect, we study the different ways for the dynamics of quantum work extraction when the battery gradually arrives at the same steady state. In the massless scalar field, the evolution with a small acceleration takes on a unique monotonicity in D</a:mi>=</a:mo>3</a:mn></a:mrow></a:math> dimensional spacetime and changes to a decaying oscillation for other higher dimensions. The increase in spacetime dimensionality can increase the energy storage capacity of the moving battery. If the mass of the scalar field is considered, the related quantum work extraction is so robust against the Unruh decoherence that the high values can keep for a very long time. The persistence of quantum work extraction is strengthened in higher dimensional spacetime. Published by the American Physical Society 2025 ","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"33 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143744893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Critical re-evaluation of recommended excitation functions of 7 reactions for 61Cu formation

IF 1.4 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-04-01 DOI: 10.1016/j.nimb.2025.165690

A. Hermanne , F. Tárkányi , A.V. Ignatyuk , S. Takács , R. Capote

{"title":"Critical re-evaluation of recommended excitation functions of 7 reactions for 61Cu formation","authors":"A. Hermanne , F. Tárkányi , A.V. Ignatyuk , S. Takács , R. Capote","doi":"10.1016/j.nimb.2025.165690","DOIUrl":"10.1016/j.nimb.2025.165690","url":null,"abstract":"<div><div>Re-evaluation of recommended cross sections for seven production reactions for the short-lived β+-emitting radionuclide ⁶1Cu included in the on-line IAEA database for medical applications (Monitor Reactions and Positron Emitters) was performed. One of those reactions is recommended as a deuteron beam monitor reaction: natNi(d,x)61Cu. The re-evaluation included recently published data as well as thoroughly analyzed earlier works available in EXFOR. Where possible, published cross sections were corrected for new nuclear decay data, especially γ-ray abundance or β+ intensity adopted in NUDAT3.0/ENSDF2020. New recommended cross section values and their uncertainties were derived from the Padé fit of the selected data. Relevant data were subjected to correction based on the recently measured ratio of the two dominant γ-rays of ⁶1Cu by Bleuel; an additional Padé fit was performed. Changes up to 20 % of the recommended monitor reaction for deuterons are observed in the 7–10 MeV of incident deuteron energy. Comparison with results of the on-line available TALYS-code calculations is provided and discussed.</div></div>","PeriodicalId":19380,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms","volume":"563 ","pages":"Article 165690"},"PeriodicalIF":1.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband X-Ray Diagnostics of a Relativistic Laser Plasma

IF 1.4 4区物理与天体物理

JETP Letters Pub Date : 2025-04-01 DOI: 10.1134/S0021364024604925

K. A. Ivanov, A. I. Sivko, I. N. Tsymbalov, G. Kh. Salakhutdinov, A. A. Kologrivov, A. A. Rupasov, E. A. Bolkhovitinov, R. V. Volkov, A. B. Savel’ev

引用次数: 0

A healthier stochastic semiclassical gravity: world without Schrödinger cats

IF 2.1 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2025-04-01 DOI: 10.1007/s10714-025-03396-z

Lajos Diósi

{"title":"A healthier stochastic semiclassical gravity: world without Schrödinger cats","authors":"Lajos Diósi","doi":"10.1007/s10714-025-03396-z","DOIUrl":"10.1007/s10714-025-03396-z","url":null,"abstract":"<div>Semiclassical gravity couples classical gravity to the quantized matter in meanfield approximation. The meanfield coupling is problematic for two reasons. First, it ignores the quantum fluctuation of matter distribution. Second, it violates the linearity of the quantum dynamics. The first problem can be be mitigated by allowing stochastic fluctuations of the geometry but the second problem lies deep in quantum foundations. Restoration of quantum linearity requires a conceptual approach to hybrid classical-quantum coupling. Studies of the measurement problem and the quantum-classical transition point the way to a solution. It is based on a postulated mechanism of spontaneous quantum monitoring plus feedback. This approach eliminates Schrödinger cat states, takes quantum fluctuations into the account, and restores the linearity of quantum dynamics. Such conceptionally ’healthier’ semiclassical theory is captivating, exists in the Newtonian limit, but its relativistic covariance hits a wall. Here we will briefly recapitulate the concept and its realization in the nonrelativistic limit. We emphasize that the long-known obstacles to the relativistic extension lie in quantum foundations.</div>","PeriodicalId":578,"journal":{"name":"General Relativity and Gravitation","volume":"57 4","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10714-025-03396-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Noninvertible symmetries in type IIB supergravity

IF 5 2区物理与天体物理

Physical Review D Pub Date : 2025-03-31 DOI: 10.1103/physrevd.111.066024

José J. Fernández-Melgarejo, Giacomo Giorgi, Diego Marqués, J. A. Rosabal

{"title":"Noninvertible symmetries in type IIB supergravity","authors":"José J. Fernández-Melgarejo, Giacomo Giorgi, Diego Marqués, J. A. Rosabal","doi":"10.1103/physrevd.111.066024","DOIUrl":"https://doi.org/10.1103/physrevd.111.066024","url":null,"abstract":"In this work, we uncover a collection of noninvertible topological operators linked to the 0-, 2-, 4-, and 6-form symmetries related to the type IIB superstring effective theory. By pinpointing the SL</a:mi>(</a:mo>2</a:mn>,</a:mo>Z</a:mi>)</a:mo></a:mrow></a:math>-covariant conserved currents corresponding to these symmetries, we first derive a set of <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><f:mi>SL</f:mi><f:mo stretchy=\"false\">(</f:mo><f:mn>2</f:mn><f:mo>,</f:mo><f:mi mathvariant=\"double-struck\">Z</f:mi><f:mo stretchy=\"false\">)</f:mo></f:math>-invariant invertible topological operators that encapsulate the integer Bogomol’nyi-Prasad-Sommerfield charges inherent to the theory. Moving forward, by incorporating fractional charges while maintaining gauge invariance, we introduce the noninvertible topological operators for each generalized symmetry and, in particular, for the <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:mi>SL</k:mi><k:mo stretchy=\"false\">(</k:mo><k:mn>2</k:mn><k:mo>,</k:mo><k:mi mathvariant=\"double-struck\">Z</k:mi><k:mo stretchy=\"false\">)</k:mo></k:math> 0-form symmetry. Identifying them as a novel kind of symmetries reminiscent of fractional quantum-Hall-effect-like noninvertible operators, we study their action on charged objects and their associated topological quantum field theories obtained via half (higher) gauging. Published by the American Physical Society 2025 ","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"10 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0