Nature Physics最新文献_第8页

Phase transition in magic with random quantum circuits 魔术中的相变与随机量子电路

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-23 DOI: 10.1038/s41567-024-02637-3

Pradeep Niroula, Christopher David White, Qingfeng Wang, Sonika Johri, Daiwei Zhu, Christopher Monroe, Crystal Noel, Michael J. Gullans

{"title":"Phase transition in magic with random quantum circuits","authors":"Pradeep Niroula, Christopher David White, Qingfeng Wang, Sonika Johri, Daiwei Zhu, Christopher Monroe, Crystal Noel, Michael J. Gullans","doi":"10.1038/s41567-024-02637-3","DOIUrl":"10.1038/s41567-024-02637-3","url":null,"abstract":"Magic is a property of quantum states that enables universal fault-tolerant quantum computing using simple sets of gate operations. Understanding the mechanisms by which magic is created or destroyed is, therefore, a crucial step towards efficient and practical fault-tolerant computation. Many proposals for error correction in quantum computing make use of so-called stabilizer codes, which use multiqubit measurements to detect deviations from logical qubit states. Here we observe that a random stabilizer code subject to coherent errors exhibits a phase transition in magic, which we characterize through analytical, numerical and experimental probes. Below a critical error rate, stabilizer measurements remove the accumulated magic in the circuit, effectively protecting against coherent errors; above the critical error rate measurements concentrate magic. A better understanding of this behaviour in the resource theory of magic could help to identify the origins of quantum speedup and lead to methods for more efficient magic state generation. Coherent noise affecting a random error correcting code is now shown to produce a transition between phases that accumulate and destroy magic.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1786-1792"},"PeriodicalIF":17.6,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276763","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

Coherent errors make magic 相干错误创造奇迹

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-23 DOI: 10.1038/s41567-024-02620-y

Xhek Turkeshi

引用次数: 0

Simulation of asteroid deflection with a megajoule-class X-ray pulse 用兆焦耳级 X 射线脉冲模拟小行星偏转

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-23 DOI: 10.1038/s41567-024-02633-7

Nathan W. Moore, Mikhail Mesh, Jason J. Sanchez, Marc-Andre Schaeuble, Chad A. McCoy, Carlos R. Aragon, Kyle R. Cochrane, Michael J. Powell, Seth Root

{"title":"Simulation of asteroid deflection with a megajoule-class X-ray pulse","authors":"Nathan W. Moore, Mikhail Mesh, Jason J. Sanchez, Marc-Andre Schaeuble, Chad A. McCoy, Carlos R. Aragon, Kyle R. Cochrane, Michael J. Powell, Seth Root","doi":"10.1038/s41567-024-02633-7","DOIUrl":"10.1038/s41567-024-02633-7","url":null,"abstract":"The Chicxulub asteroid impact triggered mass extinction, mega-tsunamis and a spell of global warming that lasted for around 100,000 years. Although the recent Double Asteroid Redirection Test mission by NASA demonstrated that near-Earth objects can be successfully targeted, deflecting the most dangerous asteroids will require energy concentrations akin to nuclear explosions. However, targets suitable for practice missions are scarce. Here we demonstrate the simulation of asteroid deflection with an X-ray pulse from a dense argon plasma generated at the Z machine, a pulsed power device at Sandia National Laboratories. We use so-called X-ray scissors to place surrogate asteroidal material into free space, simultaneously severing supports and vapourizing the target surface. The ensuing explosion accelerates the mock asteroidal material in a scaled asteroid intercept mission. Deflection velocities of around 70 m s–1 for silica targets agree with radiation-hydrodynamic model predictions. We scale these results to proposed interceptor energies and predict that asteroids up to a diameter of (4 ± 1) km can be deflected with this mechanism, showing a viable way to prepare for future planetary defence missions. Deflection is one of the options discussed for preventing catastrophic collisions of asteroids with Earth. Now, a megajoule-class X-ray pulse is used to simulate such scenarios, demonstrating that it is a viable strategy at higher interceptor energies.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1833-1839"},"PeriodicalIF":17.6,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313699","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

A dual-species Rydberg array 双物种雷德贝格阵列

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-20 DOI: 10.1038/s41567-024-02638-2

Shraddha Anand, Conor E. Bradley, Ryan White, Vikram Ramesh, Kevin Singh, Hannes Bernien

{"title":"A dual-species Rydberg array","authors":"Shraddha Anand, Conor E. Bradley, Ryan White, Vikram Ramesh, Kevin Singh, Hannes Bernien","doi":"10.1038/s41567-024-02638-2","DOIUrl":"10.1038/s41567-024-02638-2","url":null,"abstract":"Large-scale Rydberg atom arrays are used for highly coherent analogue quantum simulations and for digital quantum computations. However, advanced quantum protocols, such as quantum error correction, require midcircuit qubit operations, including the replenishment, reset and read-out of a subset of qubits. A compelling strategy for unlocking these capabilities is a dual-species architecture in which a second atomic species is controlled independently and entangled with the first through Rydberg interactions. Here, we realize a dual-species Rydberg array consisting of rubidium and caesium atoms and explore regimes of interactions and dynamics not accessible in single-species architectures. We achieve enhanced interspecies interactions by electrically tuning the Rydberg states close to a Förster resonance. In this regime, we demonstrate an interspecies Rydberg blockade and implement a quantum state transfer from one species to another. We then generate a Bell state between Rb and Cs hyperfine qubits through an interspecies controlled-phase gate. Finally, we combine interspecies entanglement with a native midcircuit read-out to achieve quantum non-demolition measurements. Rydberg atoms in optical tweezers are a promising platform for quantum information science. A platform composed of dual-species Rydberg arrays has been realized, offering access to unexplored interaction regimes and crosstalk-free midcircuit control.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1744-1750"},"PeriodicalIF":17.6,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41567-024-02638-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276065","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

Chiral dynamics of ultracold atoms under a tunable SU(2) synthetic gauge field 可调 SU(2) 合成规规场下超冷原子的手性动力学

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-20 DOI: 10.1038/s41567-024-02644-4

Qian Liang, Zhaoli Dong, Jian-Song Pan, Hongru Wang, Hang Li, Zhaoju Yang, Wei Yi, Bo Yan

{"title":"Chiral dynamics of ultracold atoms under a tunable SU(2) synthetic gauge field","authors":"Qian Liang, Zhaoli Dong, Jian-Song Pan, Hongru Wang, Hang Li, Zhaoju Yang, Wei Yi, Bo Yan","doi":"10.1038/s41567-024-02644-4","DOIUrl":"10.1038/s41567-024-02644-4","url":null,"abstract":"Surface currents arise in superconductors under magnetic fields and are a key signature of the Meissner effect. Similarly, chiral dynamics have been observed in quantum simulators under synthetic Abelian gauge fields. These simulators offer flexible control, enabling the engineering of non-Abelian gauge fields, although their influence on chiral dynamics remains unclear. Here, we implement a synthetic SU(2) gauge field in a spinful one-dimensional ladder and investigate the resulting chiral dynamics by developing a Raman momentum-lattice technique. We confirm the non-Abelian nature of the synthetic potential by observing the non-Abelian Aharonov–Bohm effect on a single plaquette. Furthermore, we find that the chiral current along the two legs of the ladder is spin dependent and highly tunable through the gauge potential parameters. We experimentally map out different dynamic regimes of the chiral current, revealing the competition between overlaying flux ladders with different spin compositions. Our experiment demonstrates the impact of non-Abelian gauge fields on chiral dynamics and offers a viable approach to implementing exotic synthetic gauge fields using Raman momentum lattices. The implementation of synthetic Abelian gauge fields in quantum simulators can result in chiral edge currents. The impact of non-Abelian gauge fields on chiral dynamics of ultracold atoms is now explored using a momentum-space lattice technique.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1738-1743"},"PeriodicalIF":17.6,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276066","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

Non-Abelian chiral dynamics in a lattice under synthetic SU(2) gauge fields 合成 SU(2) 规规场下晶格中的非阿贝尔手性动力学

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-20 DOI: 10.1038/s41567-024-02645-3

引用次数: 0

Ultracold atoms pushed to the edge 被推向边缘的超冷原子

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-19 DOI: 10.1038/s41567-024-02657-z

Luca Asteria, F. Nur Ünal

引用次数: 0

Intertwined vestigial orders in stacked magnetic flatlands 堆叠磁性平地上交织的遗迹秩序

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-18 DOI: 10.1038/s41567-024-02634-6

Ana-Marija Nedić, Peter P. Orth

引用次数: 0

A general theory of quantum codes connecting quantum computation, complexity and physics 连接量子计算、复杂性和物理学的量子密码一般理论

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-18 DOI: 10.1038/s41567-024-02622-w

引用次数: 0

Propagation of insulator-to-metal transition driven by photoinduced strain waves in a Mott material 莫特材料中由光诱导应变波驱动的绝缘体到金属转变的传播

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-09-17 DOI: 10.1038/s41567-024-02628-4

Tatsuya Amano, Danylo Babich, Ritwika Mandal, Julio Guzman-Brambila, Alix Volte, Elzbieta Trzop, Marina Servol, Ernest Pastor, Maryam Alashoor, Jörgen Larsson, Andrius Jurgilaitis, Van-Thai Pham, David Kroon, John Carl Ekström, Byungnam Ahn, Céline Mariette, Matteo Levantino, Mikhail Kozhaev, Julien Tranchant, Benoit Corraze, Laurent Cario, Mohammad Dolatabadi, Vinh Ta Phuoc, Rodolphe Sopracase, Mathieu Guillon, Hirotake Itoh, Yohei Kawakami, Yuto Nakamura, Hideo Kishida, Hervé Cailleau, Maciej Lorenc, Shinichiro Iwai, Etienne Janod

{"title":"Propagation of insulator-to-metal transition driven by photoinduced strain waves in a Mott material","authors":"Tatsuya Amano, Danylo Babich, Ritwika Mandal, Julio Guzman-Brambila, Alix Volte, Elzbieta Trzop, Marina Servol, Ernest Pastor, Maryam Alashoor, Jörgen Larsson, Andrius Jurgilaitis, Van-Thai Pham, David Kroon, John Carl Ekström, Byungnam Ahn, Céline Mariette, Matteo Levantino, Mikhail Kozhaev, Julien Tranchant, Benoit Corraze, Laurent Cario, Mohammad Dolatabadi, Vinh Ta Phuoc, Rodolphe Sopracase, Mathieu Guillon, Hirotake Itoh, Yohei Kawakami, Yuto Nakamura, Hideo Kishida, Hervé Cailleau, Maciej Lorenc, Shinichiro Iwai, Etienne Janod","doi":"10.1038/s41567-024-02628-4","DOIUrl":"10.1038/s41567-024-02628-4","url":null,"abstract":"Ultrafast photoexcitation can generate internal compressive stress in Mott insulators that lead to strain waves from free surfaces. These photoinduced elastic waves can trigger phase transitions in materials. However, a comprehensive physical picture of the phase transformation dynamics that includes acoustic-scale propagation has not yet been developed. Here we demonstrate that such a strain-wave mechanism drives the ultrafast insulator-to-metal phase transition in granular thin films of the Mott material V2O3. Our time-resolved optical reflectivity and X-ray diffraction measurements reveal that an inverse ferroelastic shear occurs before the insulator-to-metal transition, which propagates in the wake of a compressive strain wave. These dynamics are governed by the domain size and film thickness, respectively. Our results clarify the morphological conditions for the ultrafast phase transition that is favoured in granular thin films and hindered in single crystals. The resulting physical picture sheds light on the ultrafast phase transitions in quantum materials and future devices based on Mott insulators. The mechanism behind the ultrafast insulator-to-metal transition in Mott materials is still not well understood. Now, it is shown that this phase transition propagates along the pathway of a photoinduced compressive strain wave in prototypical V2O3.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 11","pages":"1778-1785"},"PeriodicalIF":17.6,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142236129","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