Physical Review Applied最新文献_第4页

Fast unconditional reset and leakage reduction of a tunable superconducting qubit via an engineered dissipative bath 通过工程耗散浴实现可调谐超导量子位的快速无条件复位和泄漏减少

2区物理与天体物理

Physical Review Applied Pub Date : 2025-06-05 DOI: 10.1103/6wc6-78y3

Gihwan Kim, Andreas Butler, Vinicius S. Ferreira, Xueyue Zhang, Alex Hadley, Eunjong Kim, Oskar Painter

引用次数: 3

Gain compression in Josephson traveling-wave parametric amplifiers 约瑟夫森行波参数放大器的增益压缩

2区物理与天体物理

Physical Review Applied Pub Date : 2025-06-04 DOI: 10.1103/tq8k-m3dr

Gwenael Le Gal, Guilliam Butseraen, Arpit Ranadive, Giulio Cappelli, Bekim Fazliji, Edgar Bonet, Eric Eyraud, Luca Planat, Nicolas Roch

引用次数: 1

Multiplexed readout of superconducting qubits using a three-dimensional reentrant-cavity filter 使用三维重入腔滤波器的超导量子位复用读出

2区物理与天体物理

Physical Review Applied Pub Date : 2025-05-29 DOI: 10.1103/physrevapplied.23.054089

Mustafa Bakr, Simone D Fasciati, Shuxiang Cao, Giulio Campanaro, James Wills, Mohammed Alghadeer, Michèle Piscitelli, Boris Shteynas, Vivek Chidambaram, Peter Leek

引用次数: 6

rf-SQUID-based traveling-wave parametric amplifier with input saturation power of −84 dBm across more than one octave in bandwidth 基于rf- squid的行波参数放大器，其输入饱和功率为- 84 dBm，带宽超过一个倍频程

2区物理与天体物理

Physical Review Applied Pub Date : 2025-05-22 DOI: 10.1103/1qk4-fzkq

Victor Gaydamachenko, Christoph Kissling, Lukas Grünhaupt

{"title":"rf-SQUID-based traveling-wave parametric amplifier with input saturation power of <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mml:mo>−</mml:mo><mml:mn>84</mml:mn></mml:math> dBm across more than one octave in bandwidth","authors":"Victor Gaydamachenko, Christoph Kissling, Lukas Grünhaupt","doi":"10.1103/1qk4-fzkq","DOIUrl":"https://doi.org/10.1103/1qk4-fzkq","url":null,"abstract":"Traveling-wave parametric amplifiers (TWPAs) have become an essential tool for the readout of quantum circuits and the search for dark matter. We report on the implementation of an rf-superconducting quantum interference device (SQUID)-based Josephson TWPA with an average saturation power of −84 dBm while providing an average power gain of 20 dB from 3.5 to 8.5 GHz. This wide bandwidth is enabled by reducing the curvature of the dispersion in the signal band while suppressing detrimental mixing processes. With 2393 rf-SQUIDs, our device has a comparable number of nonlinear elements but achieves ten times higher saturation power than previously reported devices. This shows that using rf-SQUIDs results in a more favorable trade-off between device length and saturation power. Harnessing wideband characterization techniques, we determine the TWPA’s excess noise above the quantum limit to be 0.8 to 1.5 photons. In addition, we validate the signal-to-noise ratio improvement as a practical measure for tuning the TWPA to minimize the total system noise and demonstrate that its optimum does not coincide with the highest gain.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147919029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 5

Compact superconducting vacuum-gap capacitors with low microwave loss and high mechanical coherence for scalable quantum circuits 用于可扩展量子电路的具有低微波损耗和高机械相干性的紧凑超导真空间隙电容器

2区物理与天体物理

Physical Review Applied Pub Date : 2025-05-16 DOI: 10.1103/q5bc-y54w

Amir Youssefi, Mahdi Chegnizadeh, Marco Scigliuzzo, Tobias J. Kippenberg

{"title":"Compact superconducting vacuum-gap capacitors with low microwave loss and high mechanical coherence for scalable quantum circuits","authors":"Amir Youssefi, Mahdi Chegnizadeh, Marco Scigliuzzo, Tobias J. Kippenberg","doi":"10.1103/q5bc-y54w","DOIUrl":"https://doi.org/10.1103/q5bc-y54w","url":null,"abstract":"Vacuum-gap capacitors have recently attracted significant interest in superconducting circuit platforms due to their compact design and exceptionally low dielectric losses in the microwave regime. Their intrinsic ability to support mechanical vibrational modes makes them well suited for circuit optomechanics. However, precise control over the gap size and the realization of high-coherence mechanical modes remain longstanding challenges. Here, we present a detailed and scalable fabrication process for vacuum-gap capacitors that support ultrahigh-coherence mechanical motion, exhibit low microwave loss, and occupy a significantly smaller footprint compared to conventional planar geometries. By employing a planarized SiO2 sacrificial layer, we achieve vacuum gaps on the order of 150 nm. Using this platform, we have recently demonstrated ground-state cooling and motion squeezing of a mechanical oscillator with a quality factor of 40 million-a 100-fold improvement compared to prior works-as well as a single-photon optomechanical coupling rate of approximately 15 Hz [Youssefi et al., Nat. Phys. 19, 1697 (2023)]. Additional achievements include the realization of an optomechanical topological lattice with 24 sites [Youssefi et al., Nature 612, 666 (2022)] and the observation of quantum collective dynamics in a mechanical hexamer [Chegnizadeh et al., Science 386, 1383 (2024)]. Collectively, these results underscore the potential of vacuum-gap capacitors as a platform for coupling superconducting qubits to mechanical systems, enabling quantum storage, and probing gravitational effects in quantum mechanics.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147914319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Spectral theory for nonlinear superconducting microwave systems: Extracting relaxation rates and mode hybridization 非线性超导微波系统的光谱理论：提取弛豫速率和模式杂化

2区物理与天体物理

Physical Review Applied Pub Date : 2025-05-15 DOI: 10.1103/slwj-33nx

Dung N. Pham, Richard D. Li, Hakan E. Türeci

引用次数: 3

High-coherence fluxonium qubits manufactured with a wafer-scale-uniformity process 用晶圆尺度均匀性工艺制造的高相干氟态量子比特

2区物理与天体物理

Physical Review Applied Pub Date : 2025-04-29 DOI: 10.1103/physrevapplied.23.044064

Fei Wang, Kannan Lu, Huijuan Zhan, Lu Ma, Feng Wu, Hantao Sun, Hao Deng, Yang Bai, Feng Bao, Xu Chang, Ran Gao, Xun Gao, Guicheng Gong, Lijuan Hu, Rui-Zi Hu, Honghong Ji, Xizheng Ma, Liyong Mao, Zhijun Song, Chengchun Tang, Hongcheng Wang, Tenghui Wang, Ziang Wang, Tian Xia, Hongxin Xu, Ze Zhan, Gengyan Zhang, Tao Zhou, Mengyu Zhu, Qingbin Zhu, Shasha Zhu, Xing Zhu, Yaoyun Shi, Hui‐Hai Zhao, Chunqing Deng

{"title":"High-coherence fluxonium qubits manufactured with a wafer-scale-uniformity process","authors":"Fei Wang, Kannan Lu, Huijuan Zhan, Lu Ma, Feng Wu, Hantao Sun, Hao Deng, Yang Bai, Feng Bao, Xu Chang, Ran Gao, Xun Gao, Guicheng Gong, Lijuan Hu, Rui-Zi Hu, Honghong Ji, Xizheng Ma, Liyong Mao, Zhijun Song, Chengchun Tang, Hongcheng Wang, Tenghui Wang, Ziang Wang, Tian Xia, Hongxin Xu, Ze Zhan, Gengyan Zhang, Tao Zhou, Mengyu Zhu, Qingbin Zhu, Shasha Zhu, Xing Zhu, Yaoyun Shi, Hui‐Hai Zhao, Chunqing Deng","doi":"10.1103/physrevapplied.23.044064","DOIUrl":"https://doi.org/10.1103/physrevapplied.23.044064","url":null,"abstract":"Fluxonium qubits are recognized for their high coherence times and high operation fidelities. These are attributed to their unique design incorporating a superinductor, which is typically implemented using an array of over 100 Josephson junctions; however, this complexity poses significant fabrication challenges, particularly in achieving high yield and junction uniformity with traditional methods. Here, we introduce an overlap process for Josephson-junction fabrication that achieves nearly 100% yield and maintains uniformity across a 2-inch (50.8-mm) wafer with less than 5% variation for the phase-slip junction and less than 2% for the entire junction array. We use a compact junction array design that achieves state-of-the-art dielectric loss tangents and flux noise levels, as confirmed by multiple devices. This enables fluxonium qubits to reach energy relaxation times exceeding 1 ms at the flux-frustration point. This work paves the way for scalable, high-coherence fluxonium processors using processes compatible with complementary metal-oxide semiconductor manufacturing, marking a significant step toward practical quantum computing.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"http://link.aps.org/pdf/10.1103/PhysRevApplied.23.044064","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147910442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 14

High-EJ/EC transmon qudits with up to 12 levels 高ej /EC传输量高达12个电平

2区物理与天体物理

Physical Review Applied Pub Date : 2025-03-20 DOI: 10.1103/physrevapplied.23.034046

Z. Wang, Rayleigh W. Parker, E. Champion, Machiel Blok

{"title":"High-<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\" overflow=\"scroll\"><mml:msub><mml:mi>E</mml:mi><mml:mi>J</mml:mi></mml:msub><mml:mo>/</mml:mo><mml:msub><mml:mi>E</mml:mi><mml:mi>C</mml:mi></mml:msub></mml:math> transmon qudits with up to 12 levels","authors":"Z. Wang, Rayleigh W. Parker, E. Champion, Machiel Blok","doi":"10.1103/physrevapplied.23.034046","DOIUrl":"https://doi.org/10.1103/physrevapplied.23.034046","url":null,"abstract":"Qudits provide a resource-efficient alternative to qubits for quantum information processing. The multilevel nature of the transmon, with its individually resolvable transition frequencies, makes it an attractive platform for superconducting circuit-based qudits. In this work, we systematically analyze the trade-offs associated with encoding high-dimensional quantum information in fixed-frequency transmons. Designing high ${E}_{J}/{E}_{C}$ ratios of up to 325, we observe up to 12 levels ($d=12$) on a single transmon. Despite the decreased anharmonicity, we demonstrate process infidelities ${e}_{f}<3ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}3}$ for qubitlike operations in each adjacent-level qubit subspace in the lowest ten levels. Furthermore, we achieve a ten-state readout assignment fidelity of 93.8% with the assistance of deep neural network classification of a multitone dispersive measurement. We find that the Hahn echo time ${T}_{2E}$ for the higher levels is close to the limit of ${T}_{1}$ decay, primarily limited by bosonic enhancement. We verify the recently observed Josephson harmonic model, finding that it yields better predictions for the transition frequencies and charge dispersion. Finally, we show strong $ZZ$-like coupling between the higher energy levels in a two-transmon system. Our high-fidelity control and readout methods, in combination with our comprehensive characterization of the transmon model, suggest that the high-${E}_{J}/{E}_{C}$ transmon is a powerful tool for exploring excited states in circuit quantum electrodynamics.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://arxiv.org/pdf/2407.17407","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147893798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 20

Revisiting collisional broadening of ⁸⁵Rb Rydberg levels: conclusions for vapor cell manufacture. 重温85Rb里德伯能级的碰撞加宽：关于蒸汽电池制造的结论。

IF 4.4 2区物理与天体物理

Physical Review Applied Pub Date : 2025-03-13 DOI: 10.1103/PhysRevApplied.23.034028

Mingxin Lei, Stephen P Eckel, Eric B Norrgard, Nikunjkumar Prajapati, Alexandra B Artusio-Glimpse, Matthew T Simons, Christopher L Holloway

{"title":"Revisiting collisional broadening of 85Rb Rydberg levels: conclusions for vapor cell manufacture.","authors":"Mingxin Lei, Stephen P Eckel, Eric B Norrgard, Nikunjkumar Prajapati, Alexandra B Artusio-Glimpse, Matthew T Simons, Christopher L Holloway","doi":"10.1103/PhysRevApplied.23.034028","DOIUrl":"10.1103/PhysRevApplied.23.034028","url":null,"abstract":"Electrometry based on electromagnetically induced transparency (EIT) in alkali Rydberg vapor cells may suffer reduced sensitivity due to spurious line broadening effects, caused by surface charges, contaminant gases, or other manufacturing defects. In order to draw conclusions about the deleterious effects of potential contaminant gases inside Rydberg electrometry vapor cells, we revisit collisional broadening and shifts of both the D2 line and Rydberg levels of rubidium. Specifically, we measure the broadening and shifts of the 5S1/2 → 5P3/2 (i.e., the D2 line) and 5S1/2 → 5P3/2 → (25D,27S,30D,32S,35D,37S) transitions of 85Rb due to He, Ne, N2 and Ar. By combining these measurements with observations of velocity changing collisions in the sub-Doppler spectrum of the D2 line, we conclude the following: (1) that contaminant gases are most likely not the cause of irregular line shapes or shifts of Rydberg transitions due to the high pressures required, and (2) the sub-Doppler spectrum of the D2 line, through its accompanying loss of contrast at high pressures, can validate that a vapor cell is sufficiently free of contaminant gas for EIT electrometry. We use the theory of Omont, J. Phys. France 38, 1343 (1977), to extend our results to a wide variety of possible contaminant gases and further derive scaling laws applicable to all gases.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13170533/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147942573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Near-ground-state cooling in electromechanics using measurement-based feedback and a Josephson traveling-wave parametric amplifier 使用基于测量的反馈和约瑟夫森行波参数放大器的机电近基态冷却

2区物理与天体物理

Physical Review Applied Pub Date : 2025-03-05 DOI: 10.1103/physrevapplied.23.034009

Ewa Rej, Richa Cutting, Joe Depellette, Debopam Datta, Nils Tiencken, Joonas Govenius, Visa Vesterinen, Yulong Liu, Mika A. Sillanpää

{"title":"Near-ground-state cooling in electromechanics using measurement-based feedback and a Josephson traveling-wave parametric amplifier","authors":"Ewa Rej, Richa Cutting, Joe Depellette, Debopam Datta, Nils Tiencken, Joonas Govenius, Visa Vesterinen, Yulong Liu, Mika A. Sillanpää","doi":"10.1103/physrevapplied.23.034009","DOIUrl":"https://doi.org/10.1103/physrevapplied.23.034009","url":null,"abstract":"Feedback-based control of nano- and micromechanical resonators can enable the study of macroscopic quantum phenomena and also sensitive force measurements. Here, we demonstrate the feedback cooling of a low-loss and high-stress macroscopic SiN membrane resonator close to its quantum ground state. We use the microwave optomechanical platform, where the resonator is coupled to a microwave cavity. The experiment utilizes a Josephson traveling-wave parametric amplifier, which is nearly quantum-limited in added noise, and is important for mitigating resonator heating due to system noise in the feedback loop. We reach a thermal phonon number as low as 1.6, which is limited primarily by microwave-induced heating. We also discuss the sideband asymmetry observed when a weak microwave tone for independent readout is applied in addition to other tones used for the cooling. In a typical situation, the asymmetry can be attributed to the quantum-mechanical imbalance between emission and absorption. In specific situations, however, we find that the asymmetry is an artifact due to coupling of different sideband processes by cavity nonlinearity under multitone irradiation.","PeriodicalId":20109,"journal":{"name":"Physical Review Applied","volume":"23 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147904761","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: 6