物理与天体物理最新文献

Mitigating errors in analog quantum simulation by Hamiltonian reshaping or Hamiltonian rescaling

IF 7.6 1区物理与天体物理

npj Quantum Information Pub Date : 2025-01-28 DOI: 10.1038/s41534-025-00969-3

Rui-Cheng Guo, Yanwu Gu, Dong E. Liu

{"title":"Mitigating errors in analog quantum simulation by Hamiltonian reshaping or Hamiltonian rescaling","authors":"Rui-Cheng Guo, Yanwu Gu, Dong E. Liu","doi":"10.1038/s41534-025-00969-3","DOIUrl":"https://doi.org/10.1038/s41534-025-00969-3","url":null,"abstract":"Simulating quantum many-body systems is crucial for advancing physics but poses substantial challenges for classical computers. Quantum simulations overcome these limitations, with analog simulators offering unique advantages over digital methods, such as lower systematic errors and reduced circuit depth, making them efficient for studying complex quantum phenomena. However, unlike their digital counterparts, analog quantum simulations face significant limitations due to the absence of effective error mitigation techniques. This work introduces two novel error mitigation strategies—Hamiltonian reshaping and Hamiltonian rescaling—in analog quantum simulation for tasks like eigen-energy evaluation. Hamiltonian reshaping uses random unitary transformations to generate new Hamiltonians with identical eigenvalues but varied eigenstates, allowing error reduction through averaging. Hamiltonian rescaling mitigates errors by comparing eigenvalue estimates from energy-scaled Hamiltonians. Numerical calculations validate both methods, demonstrating their significant practical effectiveness in enhancing the accuracy and reliability of analog quantum simulators.","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"25 1","pages":""},"PeriodicalIF":7.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143049901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Quantum theory of the Lemaître model for gravitational collapse

IF 2.8 4区物理与天体物理

General Relativity and Gravitation Pub Date : 2025-01-28 DOI: 10.1007/s10714-025-03349-6

Claus Kiefer, Hamid Mohaddes

引用次数: 0

Bandwidth Enhancement of Epsilon-Near-Zero Supercoupling with Inverse-Designed Metamaterials

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-01-28 DOI: 10.1002/lpor.202402014

Pengyu Fu, Peihang Li, Yue Li

引用次数: 0

Ultralow Turn-On Voltage Organic Upconversion Devices for High-Resolution Imaging Based on Near-Infrared Homotandem Photodetector

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-01-28 DOI: 10.1002/lpor.202401375

Xingwei Han, Chao Han, Meiyu He, Jiayue Han, He Yu, Jun Gou, Jun Wang

{"title":"Ultralow Turn-On Voltage Organic Upconversion Devices for High-Resolution Imaging Based on Near-Infrared Homotandem Photodetector","authors":"Xingwei Han, Chao Han, Meiyu He, Jiayue Han, He Yu, Jun Gou, Jun Wang","doi":"10.1002/lpor.202401375","DOIUrl":"https://doi.org/10.1002/lpor.202401375","url":null,"abstract":"In recent years, infrared visualization technology has attracted significant attention, and organic upconversion devices (OUDs) have become a reliable infrared imaging strategy due to the superiority of low cost, simple structure, and large-area imaging. Nonetheless, the power consumption of OUDs is mostly high, so effectively reducing the turn-on voltage (Von) has emerged as a crucial aspect in optimizing OUD performance, alongside the urgent need to enhance imaging resolution. This work presents an efficient OUD integrating a homotandem photodetector and an organic light-emitting diode to reduce the Von of the OUD since the homotandem detection unit can generate nearly twice the open-circuit voltage (Voc) compared to the single detection unit. The device reaches a noteworthy Von of 0.64 V, which is the lowest Von reported for OUDs, accompanied by a high upconversion efficiency of 10.64% and a wide luminance linear dynamic range (L-LDR) of 82.94 dB. In addition, high-quality bioimaging with wide operating voltages is demonstrated, achieving imaging resolution up to 5799 pixels per inch (ppi). This work demonstrates an effective technical approach to reduce the power consumption of OUDs and facilitate future bioimaging applications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"10 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Approaching the Quantum-Limited Precision in Frequency-Comb-Based Spectral Interferometric Ranging

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-01-28 DOI: 10.1002/lpor.202401995

Yoon-Soo Jang, Heulbi Ahn, Sunghoon Eom, Jungjae Park, Jonghan Jin

引用次数: 0

The formation of a nuclear-spin dark state in silicon

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2025-01-28 DOI: 10.1038/s41567-024-02773-w

Xinxin Cai, Habitamu Y. Walelign, John M. Nichol

引用次数: 0

Designing open quantum systems with known steady states: Davies generators and beyond

IF 6.4 2区物理与天体物理

Quantum Pub Date : 2025-01-28 DOI: 10.22331/q-2025-01-28-1612

Jinkang Guo, Oliver Hart, Chi-Fang Chen, Aaron J. Friedman, Andrew Lucas

{"title":"Designing open quantum systems with known steady states: Davies generators and beyond","authors":"Jinkang Guo, Oliver Hart, Chi-Fang Chen, Aaron J. Friedman, Andrew Lucas","doi":"10.22331/q-2025-01-28-1612","DOIUrl":"https://doi.org/10.22331/q-2025-01-28-1612","url":null,"abstract":"We provide a systematic framework for constructing generic models of nonequilibrium quantum dynamics with a target stationary (mixed) state. Our framework identifies (almost) all combinations of Hamiltonian and dissipative dynamics that relax to a steady state of interest, generalizing the Davies’ generator for dissipative relaxation at finite temperature to nonequilibrium dynamics targeting arbitrary stationary states. We focus on Gibbs states of stabilizer Hamiltonians, identifying local Lindbladians compatible therewith by constraining the rates of dissipative and unitary processes. Moreover, given terms in the Lindbladian not compatible with the target state, our formalism identifies the operations – including syndrome measurements and local feedback – one must apply to correct these errors. Our methods also reveal new models of quantum dynamics: for example, we provide a “measurement-induced phase transition” in which measurable two-point functions exhibit critical (power-law) scaling with distance at a critical ratio of the transverse field and rate of measurement and feedback. Time-reversal symmetry – defined naturally within our formalism – can be broken both in effectively classical and intrinsically quantum ways. Our framework provides a systematic starting point for exploring the landscape of dynamical universality classes in open quantum systems, as well as identifying new protocols for quantum error correction.","PeriodicalId":20807,"journal":{"name":"Quantum","volume":"47 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143049871","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

Multiplexed Quantum Communication with Surface and Hypergraph Product Codes

IF 6.4 2区物理与天体物理

Quantum Pub Date : 2025-01-28 DOI: 10.22331/q-2025-01-28-1613

Shin Nishio, Nicholas Connolly, Nicolò Lo Piparo, William John Munro, Thomas Rowan Scruby, Kae Nemoto

引用次数: 0

A thermodynamically consistent approach to the energy costs of quantum measurements

IF 6.4 2区物理与天体物理

Quantum Pub Date : 2025-01-28 DOI: 10.22331/q-2025-01-28-1614

Camille L Latune, Cyril Elouard

{"title":"A thermodynamically consistent approach to the energy costs of quantum measurements","authors":"Camille L Latune, Cyril Elouard","doi":"10.22331/q-2025-01-28-1614","DOIUrl":"https://doi.org/10.22331/q-2025-01-28-1614","url":null,"abstract":"Considering a general microscopic model for a quantum measuring apparatus comprising a quantum probe coupled to a thermal bath, we analyze the energetic resources necessary for the realization of a quantum measurement, which includes the creation of system-apparatus correlations, the irreversible transition to a statistical mixture of definite outcomes, and the apparatus resetting. Crucially, we do not resort to another quantum measurement to capture the emergence of objective measurement results, but rather exploit the properties of the thermal bath which redundantly records the measurement result in its degrees of freedom, naturally implementing the paradigm of quantum Darwinism. In practice, this model allows us to perform a quantitative thermodynamic analysis of the measurement process. From the expression of the second law, we show how the minimal required work depends on the energy variation of the system being measured plus information-theoretic quantities characterizing the performance of the measurement – efficiency and completeness. Additionally, we show that it is possible to perform a thermodynamically reversible measurement, thus reaching the minimal work expenditure, and provide the corresponding protocol. Finally, for finite-time measurement protocols, we illustrate the increasing work cost induced by rising entropy production inherent in finite-time thermodynamic processes. This highlights an emerging trade-off between velocity of the measurement and work cost, on top of a trade-off between efficiency of the measurement and work cost. We apply those findings to bring new insights in the thermodynamic balance of the measurement-powered quantum engines.","PeriodicalId":20807,"journal":{"name":"Quantum","volume":"35 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143049903","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

Enhancing Detection Capability of Orbital Angular Momentum Sorter

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-01-28 DOI: 10.1002/lpor.202401759

Rong Yan, Hammad Ahmed, Muhammad Afnan Ansari, Guanchao Wang, Chunmei Zhang, Li Li, Hao Tian, Liheng Bian, Xianzhong Chen

{"title":"Enhancing Detection Capability of Orbital Angular Momentum Sorter","authors":"Rong Yan, Hammad Ahmed, Muhammad Afnan Ansari, Guanchao Wang, Chunmei Zhang, Li Li, Hao Tian, Liheng Bian, Xianzhong Chen","doi":"10.1002/lpor.202401759","DOIUrl":"https://doi.org/10.1002/lpor.202401759","url":null,"abstract":"Each photon in a vortex beam carries an orbital angular momentum (OAM). OAM detection plays a very important role in unlocking the new capability of vortex beams in both fundamental research and technological advancements. As the number of information channels continues to grow, there is an urgent need to improve the detection capability of the OAM sorting system. The unprecedented capability of optical metasurfaces has provided an opportunity to realize OAM detection in a compact platform. Different OAM modes are typically separated into distinct light spots in OAM sorting. However, each spot in an OAM sorting system is tailored to recognize only one predesigned OAM mode. A metasurface approach to detecting more OAM modes with the same number of light spots in the observation plane is demonstrated. The conservation of momentum in the design is realized with a customized multifoci metalens. The efficacy of this method is exemplified through the detection of two OAM modes in an individual light spot, dramatically increasing the detection capability of the OAM sorter. It is anticipated that this design will reduce the demand for spatial resources, creating new opportunities to explore OAM applications across many research fields such as optical communications and quantum science.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"28 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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