Nature Physics最新文献_第8页

When noise becomes the signal

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-13 DOI: 10.1038/s41567-024-02766-9

Aaron Hui

引用次数: 0

Like a virus

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-13 DOI: 10.1038/s41567-025-02815-x

Bart Verberck

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An ocean of code

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-13 DOI: 10.1038/s41567-025-02808-w

引用次数: 0

Undefined futures

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-13 DOI: 10.1038/s41567-025-02780-5

Mark Buchanan

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Fractional football finish

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-13 DOI: 10.1038/s41567-025-02814-y

Stefanie Reichert

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All-optical superconducting qubit readout

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-11 DOI: 10.1038/s41567-024-02741-4

Georg Arnold, Thomas Werner, Rishabh Sahu, Lucky N. Kapoor, Liu Qiu, Johannes M. Fink

{"title":"All-optical superconducting qubit readout","authors":"Georg Arnold, Thomas Werner, Rishabh Sahu, Lucky N. Kapoor, Liu Qiu, Johannes M. Fink","doi":"10.1038/s41567-024-02741-4","DOIUrl":"10.1038/s41567-024-02741-4","url":null,"abstract":"The rapid development of superconducting quantum hardware is expected to run into substantial restrictions on scalability because error correction in a cryogenic environment has stringent input–output requirements. Classical data centres rely on fibre-optic interconnects to remove similar networking bottlenecks. In the same spirit, ultracold electro-optic links have been proposed and used to generate qubit control signals, or to replace cryogenic readout electronics. So far, these approaches have suffered from either low efficiency, low bandwidth or additional noise. Here we realize radio-over-fibre qubit readout at millikelvin temperatures. We use one device to simultaneously perform upconversion and downconversion between microwave and optical frequencies and so do not require any active or passive cryogenic microwave equipment. We demonstrate all-optical single-shot readout in a circulator-free readout scheme. Importantly, we do not observe any direct radiation impact on the qubit state, despite the absence of shielding elements. This compatibility between superconducting circuits and telecom-wavelength light is not only a prerequisite to establish modular quantum networks, but it is also relevant for multiplexed readout of superconducting photon detectors and classical superconducting logic. Microwaves are usually used to interact with superconducting qubits, but optical photons can be processed at room temperature. The electro-optical transceiver presented here allows all-optical readout of a qubit without affecting its performance.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 3","pages":"393-400"},"PeriodicalIF":17.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41567-024-02741-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Optical readout of a superconducting qubit using a piezo-optomechanical transducer

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-11 DOI: 10.1038/s41567-024-02742-3

T. C. van Thiel, M. J. Weaver, F. Berto, P. Duivestein, M. Lemang, K. L. Schuurman, M. Žemlička, F. Hijazi, A. C. Bernasconi, C. Ferrer, E. Cataldo, E. Lachman, M. Field, Y. Mohan, F. K. de Vries, C. C. Bultink, J. C. van Oven, J. Y. Mutus, R. Stockill, S. Gröblacher

{"title":"Optical readout of a superconducting qubit using a piezo-optomechanical transducer","authors":"T. C. van Thiel, M. J. Weaver, F. Berto, P. Duivestein, M. Lemang, K. L. Schuurman, M. Žemlička, F. Hijazi, A. C. Bernasconi, C. Ferrer, E. Cataldo, E. Lachman, M. Field, Y. Mohan, F. K. de Vries, C. C. Bultink, J. C. van Oven, J. Y. Mutus, R. Stockill, S. Gröblacher","doi":"10.1038/s41567-024-02742-3","DOIUrl":"10.1038/s41567-024-02742-3","url":null,"abstract":"Superconducting quantum processors have made important progress in size and computing potential. However, the practical cryogenic limitations of operating large numbers of superconducting qubits are becoming a bottleneck for further scaling. Due to the low thermal conductivity and the dense optical multiplexing capacity of telecommunications fibre, converting qubit signal processing to the optical domain using microwave-to-optics transduction would substantially relax the strain on cryogenic space and thermal budgets. Here we demonstrate optical readout of a superconducting transmon qubit through an optical fibre connected via a coaxial cable to a fully integrated piezo-optomechanical transducer. Using a demolition readout technique, we achieve a single-shot readout fidelity of 81%. Our results illustrate the benefits of piezo-optomechanical transduction for low-dissipation operation of large quantum processors. Superconducting qubits are measured using microwaves, posing constraints on its size and thermal budgets. The electro-optic transceiver presented here can be used to perform optical readout without affecting qubit performance.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 3","pages":"401-405"},"PeriodicalIF":17.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385240","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

Nematicity and orbital depairing in superconducting Bernal bilayer graphene

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-10 DOI: 10.1038/s41567-024-02776-7

Ludwig Holleis, Caitlin L. Patterson, Yiran Zhang, Yaar Vituri, Heun Mo Yoo, Haoxin Zhou, Takashi Taniguchi, Kenji Watanabe, Erez Berg, Stevan Nadj-Perge, Andrea F. Young

{"title":"Nematicity and orbital depairing in superconducting Bernal bilayer graphene","authors":"Ludwig Holleis, Caitlin L. Patterson, Yiran Zhang, Yaar Vituri, Heun Mo Yoo, Haoxin Zhou, Takashi Taniguchi, Kenji Watanabe, Erez Berg, Stevan Nadj-Perge, Andrea F. Young","doi":"10.1038/s41567-024-02776-7","DOIUrl":"10.1038/s41567-024-02776-7","url":null,"abstract":"Superconductivity is a common feature of graphite allotropes, having been observed in Bernal bilayers, rhombohedral trilayers and a wide variety of angle-misaligned multilayers. Despite notable differences in the electronic structure of these systems, supporting the graphite on a WSe2 substrate has been consistently observed to expand the range of the superconductivity in terms of carrier density and temperature. Here we report the observation of two distinct superconducting states in Bernal bilayer graphene with strong proximity-induced Ising spin–orbit coupling. Our quantum oscillation measurements show that, although the normal state of the first superconducting phase is consistent with the single-particle band structure, the second emerges from a nematic normal state with broken rotational symmetry. Both superconductors are robust to in-plane magnetic fields, but neither reach fields expected for spin–valley-locked Ising superconductors. The Fermi surface geometry of the first superconducting phase suggests that the superconductivity is limited by orbital depairing arising from the imperfect layer polarization of the electron wavefunctions. Finally, an analysis of transport and thermodynamic compressibility measurements in the second superconducting phase shows that the proximity to isospin phase boundaries, observed in other rhombohedral graphene allotropes, is probably coincidental, thus constraining theories of the pairing mechanisms in these systems. Two regions of superconductivity are observed in the phase diagram of Bernal-stacked bilayer graphene. Spin–orbit coupling induced by the substrate and orbital moments are shown to be important in describing their properties.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 3","pages":"444-450"},"PeriodicalIF":17.6,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143375664","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: Free-electron quantum optics

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-07 DOI: 10.1038/s41567-025-02816-w

Ron Ruimy, Aviv Karnieli, Ido Kaminer

引用次数: 0

Unified percolation scenario for the α and β processes in simple glass formers

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2025-02-07 DOI: 10.1038/s41567-024-02762-z

Liang Gao, Hai-Bin Yu, Thomas B. Schrøder, Jeppe C. Dyre

{"title":"Unified percolation scenario for the α and β processes in simple glass formers","authors":"Liang Gao, Hai-Bin Yu, Thomas B. Schrøder, Jeppe C. Dyre","doi":"10.1038/s41567-024-02762-z","DOIUrl":"10.1038/s41567-024-02762-z","url":null,"abstract":"Given the vast differences in interaction details, describing the dynamics of structurally disordered materials in a unified theoretical framework presents a fundamental challenge to condensed-matter physics and materials science. Here we numerically investigate a double-percolation scenario for the two most important relaxation processes of supercooled liquids and glasses, the so-called α and β relaxations. For several simple glass formers, we find that when monitoring the dynamic shear modulus as temperature is lowered from the liquid state, percolation of immobile particles takes place at the temperature locating the α process. Mirroring this, upon continued cooling into the glass state, the mobile-particle percolation transition pinpoints a β process whenever the latter is well separated from the main (α) process. For two-dimensional systems under the same conditions, percolation of mobile and immobile particles occurs nearly simultaneously, and no β relaxation can be identified. Our findings suggest that a general description of glassy dynamics should be based on a percolation perspective. A unified description of the dynamics of structurally disordered materials is challenging. Simulations of model systems now show that percolation theory provides a framework unifying the two most prominent relaxation processes in supercooled liquids and glasses.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"21 3","pages":"471-479"},"PeriodicalIF":17.6,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258026","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