Nature Physics最新文献

Observation of microscopic confinement dynamics by a tunable topological θ-angle

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-20 DOI: 10.1038/s41567-024-02702-x

Wei-Yong Zhang, Ying Liu, Yanting Cheng, Ming-Gen He, Han-Yi Wang, Tian-Yi Wang, Zi-Hang Zhu, Guo-Xian Su, Zhao-Yu Zhou, Yong-Guang Zheng, Hui Sun, Bing Yang, Philipp Hauke, Wei Zheng, Jad C. Halimeh, Zhen-Sheng Yuan, Jian-Wei Pan

{"title":"Observation of microscopic confinement dynamics by a tunable topological θ-angle","authors":"Wei-Yong Zhang, Ying Liu, Yanting Cheng, Ming-Gen He, Han-Yi Wang, Tian-Yi Wang, Zi-Hang Zhu, Guo-Xian Su, Zhao-Yu Zhou, Yong-Guang Zheng, Hui Sun, Bing Yang, Philipp Hauke, Wei Zheng, Jad C. Halimeh, Zhen-Sheng Yuan, Jian-Wei Pan","doi":"10.1038/s41567-024-02702-x","DOIUrl":"https://doi.org/10.1038/s41567-024-02702-x","url":null,"abstract":"The topological θ-angle is central to several gauge theories in condensed-matter and high-energy physics. For example, it is responsible for the strong CP problem in quantum chromodynamics and can emerge in effective theories of electrodynamics in topological insulators. Although analogue quantum simulators potentially offer a venue for realizing and controlling the θ-angle, doing so has hitherto remained an outstanding challenge. Here, we describe the experimental realization of a tunable topological θ-angle in a Bose–Hubbard gauge-theory quantum simulator, which was implemented through a tilted superlattice potential that induces an effective background electric field. We demonstrate the emerging physics through the direct observation of the confinement–deconfinement transition of (1 + 1)-dimensional quantum electrodynamics. Using an atomic-precision quantum gas microscope, we distinguish between the confined and deconfined phases by monitoring the real-time evolution of particle–antiparticle pairs. Our work provides a step forward in the realization of topological terms on modern quantum simulators.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"201 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857544","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

Publisher Correction: Heavy-tailed neuronal connectivity arises from Hebbian self-organization 出版商更正：重尾神经元连通性源于海比自组织

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-19 DOI: 10.1038/s41567-024-02748-x

Christopher W. Lynn, Caroline M. Holmes, Stephanie E. Palmer

引用次数: 0

Controlling interactions between high-frequency phonons and single quantum systems using phononic crystals

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-18 DOI: 10.1038/s41567-024-02697-5

Kazuhiro Kuruma, Benjamin Pingault, Cleaven Chia, Michael Haas, Graham D. Joe, Daniel Rimoli Assumpcao, Sophie Weiyi Ding, Chang Jin, C. J. Xin, Matthew Yeh, Neil Sinclair, Marko Lončar

{"title":"Controlling interactions between high-frequency phonons and single quantum systems using phononic crystals","authors":"Kazuhiro Kuruma, Benjamin Pingault, Cleaven Chia, Michael Haas, Graham D. Joe, Daniel Rimoli Assumpcao, Sophie Weiyi Ding, Chang Jin, C. J. Xin, Matthew Yeh, Neil Sinclair, Marko Lončar","doi":"10.1038/s41567-024-02697-5","DOIUrl":"https://doi.org/10.1038/s41567-024-02697-5","url":null,"abstract":"The ability to control phonons in solids is key in many fields of quantum science, ranging from quantum information processing to sensing. Phonons often act as a source of noise and decoherence when solid-state quantum systems interact with the phonon bath of their host matrix. In this study, we demonstrate the ability to control the phononic local density of states of the host matrix using phononic crystals and measure its positive impact on single quantum systems. We design and fabricate diamond phononic crystals with features down to around 20 nm, resulting in a high-frequency complete phononic bandgap from 50 to 70 GHz. The engineered local density of states is probed using single silicon-vacancy colour centres embedded in the phononic crystals. We observe an 18-fold reduction in the phonon-induced orbital relaxation rate of the emitters compared to bulk, thereby demonstrating that the phononic crystal suppresses spontaneous single-phonon processes. Furthermore, we show that our approach can efficiently suppress single-phonon–emitter interactions up to 20 K, allowing the investigation of multi-phonon processes in the emitters. Our results represent an important step towards the realization of efficient phonon–emitter interfaces that can be used for quantum acoustodynamics and quantum phononic networks.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840856","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

Nishimori transition across the error threshold for constant-depth quantum circuits 恒定深度量子电路跨误差阈值的西森转变

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-16 DOI: 10.1038/s41567-024-02696-6

Edward H. Chen, Guo-Yi Zhu, Ruben Verresen, Alireza Seif, Elisa Bäumer, David Layden, Nathanan Tantivasadakarn, Guanyu Zhu, Sarah Sheldon, Ashvin Vishwanath, Simon Trebst, Abhinav Kandala

{"title":"Nishimori transition across the error threshold for constant-depth quantum circuits","authors":"Edward H. Chen, Guo-Yi Zhu, Ruben Verresen, Alireza Seif, Elisa Bäumer, David Layden, Nathanan Tantivasadakarn, Guanyu Zhu, Sarah Sheldon, Ashvin Vishwanath, Simon Trebst, Abhinav Kandala","doi":"10.1038/s41567-024-02696-6","DOIUrl":"https://doi.org/10.1038/s41567-024-02696-6","url":null,"abstract":"Quantum computing involves the preparation of entangled states across many qubits. This requires efficient preparation protocols that are stable to noise and gate imperfections. Here we demonstrate the generation of the simplest long-range order—Ising order—using a measurement-based protocol on 54 system qubits in the presence of coherent and incoherent errors. We implement a constant-depth preparation protocol that uses classical decoding of measurements to identify long-range order that is otherwise hidden by the randomness of quantum measurements. By experimentally tuning the error rates, we demonstrate the stability of this decoded long-range order in two spatial dimensions, up to a critical phase transition belonging to the unusual Nishimori universality class. Although in classical systems Nishimori physics requires fine-tuning multiple parameters, here it arises as a direct result of the Born rule for measurement probabilities. Our study demonstrates the emergent phenomena that can be explored on quantum processors beyond a hundred qubits.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"6 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825429","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

Evidence for fractional matter coupled to an emergent gauge field in a quantum spin ice

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-12 DOI: 10.1038/s41567-024-02711-w

Victor Porée, Han Yan, Félix Desrochers, Sylvain Petit, Elsa Lhotel, Markus Appel, Jacques Ollivier, Yong Baek Kim, Andriy H. Nevidomskyy, Romain Sibille

{"title":"Evidence for fractional matter coupled to an emergent gauge field in a quantum spin ice","authors":"Victor Porée, Han Yan, Félix Desrochers, Sylvain Petit, Elsa Lhotel, Markus Appel, Jacques Ollivier, Yong Baek Kim, Andriy H. Nevidomskyy, Romain Sibille","doi":"10.1038/s41567-024-02711-w","DOIUrl":"https://doi.org/10.1038/s41567-024-02711-w","url":null,"abstract":"Electronic spins can form long-range entangled phases of condensed matter named quantum spin liquids. They are expected to form in frustrated magnets that do not exhibit symmetry-breaking order down to zero temperature. Quantum spin ice is a theoretically well-established example described by an emergent quantum electrodynamics, with quasiparticle excitations behaving like photons and fractionally charged matter. However, in frustrated magnets it remains difficult to establish convincing experimental evidence for quantum spin liquid ground states and their fractional excitations. Here we study the time-dependent magnetic response of the candidate quantum spin ice material Ce2Sn2O7. We find a gapped spectrum that features a threshold and peaks that match theories for pair production and propagation of fractional matter excitations strongly coupled to a background quantum electrodynamic field. The multiple peaks in our neutron spectroscopy data are a specific signature of the so-called π-flux phase of quantum spin ice, providing spectroscopic evidence for fractionalization in a three-dimensional quantum spin liquid.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"24 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142809867","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

Author Correction: Real-space imaging of phase transitions in bridged artificial kagome spin ice

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-12 DOI: 10.1038/s41567-024-02747-y

Kevin Hofhuis, Sandra Helen Skjærvø, Sergii Parchenko, Hanu Arava, Zhaochu Luo, Armin Kleibert, Peter Michael Derlet, Laura Jane Heyderman

引用次数: 0

Into the islands of inversion

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-12 DOI: 10.1038/s41567-024-02718-3

Anna Corsi

引用次数: 0

Chirp of the town