arXiv - PHYS - Quantum Physics最新文献_第6页

Observation of Interface Piezoelectricity in Superconducting Devices on Silicon 硅基超导器件的界面压电观测

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-16 DOI: arxiv-2409.10626

Haoxin Zhou, Eric Li, Kadircan Godeneli, Zi-Huai Zhang, Shahin Jahanbani, Kangdi Yu, Mutasem Odeh, Shaul Aloni, Sinéad Griffin, Alp Sipahigil

{"title":"Observation of Interface Piezoelectricity in Superconducting Devices on Silicon","authors":"Haoxin Zhou, Eric Li, Kadircan Godeneli, Zi-Huai Zhang, Shahin Jahanbani, Kangdi Yu, Mutasem Odeh, Shaul Aloni, Sinéad Griffin, Alp Sipahigil","doi":"arxiv-2409.10626","DOIUrl":"https://doi.org/arxiv-2409.10626","url":null,"abstract":"The evolution of superconducting quantum processors is driven by the need to\u0000reduce errors and scale for fault-tolerant computation. Reducing physical qubit\u0000error rates requires further advances in the microscopic modeling and control\u0000of decoherence mechanisms in superconducting qubits. Piezoelectric interactions\u0000contribute to decoherence by mediating energy exchange between microwave\u0000photons and acoustic phonons. Centrosymmetric materials like silicon and\u0000sapphire do not display piezoelectricity and are the preferred substrates for\u0000superconducting qubits. However, the broken centrosymmetry at material\u0000interfaces may lead to piezoelectric losses in qubits. While this loss\u0000mechanism was predicted two decades ago, interface piezoelectricity has not\u0000been experimentally observed in superconducting devices. Here, we report the\u0000observation of interface piezoelectricity at an aluminum-silicon junction and\u0000show that it constitutes an important loss channel for superconducting devices.\u0000We fabricate aluminum interdigital surface acoustic wave transducers on silicon\u0000and demonstrate piezoelectric transduction from room temperature to millikelvin\u0000temperatures. We find an effective electromechanical coupling factor of\u0000$K^2approx 2 times 10^{-5}%$ comparable to weakly piezoelectric substrates.\u0000We model the impact of the measured interface piezoelectric response on\u0000superconducting qubits and find that the piezoelectric surface loss channel\u0000limits qubit quality factors to $Qsim10^4-10^8$ for designs with different\u0000surface participation ratios and electromechanical mode matching. These results\u0000identify electromechanical surface losses as a significant dissipation channel\u0000for superconducting qubits, and show the need for heterostructure and phononic\u0000engineering to minimize errors in next-generation superconducting qubits.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design for telecom-wavelength quantum emitters in silicon based on alkali-metal-saturated vacancy complexes 基于碱金属饱和空位复合物的硅电信波长量子发射器设计

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-16 DOI: arxiv-2409.10746

Péter Udvarhelyi, Prineha Narang

引用次数: 0

Evolving a Multi-Population Evolutionary-QAOA on Distributed QPUs 在分布式 QPU 上演化多人群进化 QAOA

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-16 DOI: arxiv-2409.10739

Francesca Schiavello, Edoardo Altamura, Ivano Tavernelli, Stefano Mensa, Benjamin Symons

引用次数: 0

Overcoming the Standard Quantum Limit with Electro-Optomechanical Hybrid System for Enhanced Force Sensing 利用电子-光机械混合系统克服标准量子极限，增强力传感能力

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-16 DOI: arxiv-2409.10694

Alolika Roy, Amarendra K. Sarma

引用次数: 0

Scrambling in the Charging of Quantum Batteries 量子电池充电中的杂乱无章

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-16 DOI: arxiv-2409.10590

Sebastián V. Romero, Yongcheng Ding, Xi Chen, Yue Ban

引用次数: 0

A Fully Gauge-Fixed SU(2) Hamiltonian for Quantum Simulations 用于量子模拟的全量规固定 SU(2) 哈密顿方程

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-16 DOI: arxiv-2409.10610

Dorota M. Grabowska, Christopher F. Kane, Christian W. Bauer

{"title":"A Fully Gauge-Fixed SU(2) Hamiltonian for Quantum Simulations","authors":"Dorota M. Grabowska, Christopher F. Kane, Christian W. Bauer","doi":"arxiv-2409.10610","DOIUrl":"https://doi.org/arxiv-2409.10610","url":null,"abstract":"We demonstrate how to construct a fully gauge-fixed lattice Hamiltonian for a\u0000pure SU(2) gauge theory. Our work extends upon previous work, where a\u0000formulation of an SU(2) lattice gauge theory was developed that is efficient to\u0000simulate at all values of the gauge coupling. That formulation utilized\u0000maximal-tree gauge, where all local gauge symmetries are fixed and a residual\u0000global gauge symmetry remains. By using the geometric picture of an SU(2)\u0000lattice gauge theory as a system of rotating rods, we demonstrate how to fix\u0000the remaining global gauge symmetry. In particular, the quantum numbers\u0000associated with total charge can be isolated by rotating between the lab and\u0000body frames using the three Euler angles. The Hilbert space in this new\u0000`sequestered' basis partitions cleanly into sectors with differing total\u0000angular momentum, which makes gauge-fixing to a particular total charge sector\u0000trivial, particularly for the charge-zero sector. In addition to this\u0000sequestered basis inheriting the property of being efficient at all values of\u0000the coupling, we show that, despite the global nature of the final gauge-fixing\u0000procedure, this Hamiltonian can be simulated using quantum resources scaling\u0000only polynomially with the lattice volume.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High gain squeezing in lossy resonators: an asymptotic field approach 有损谐振器的高增益挤压：渐近场方法

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-16 DOI: arxiv-2409.10639

Michael Sloan, Alice Viola, Marco Liscidini, J. E. Sipe

引用次数: 0

Thermodynamics of a Modified Fermi-Hubbard Model 修正费米-哈伯德模型的热力学

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-16 DOI: arxiv-2409.11180

Moorad Alexanian

引用次数: 0

Size and Shape of Fuzzy Spheres from Matrix/Membrane Correspondence 从基质/膜对应关系看模糊球的大小和形状

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-15 DOI: arxiv-2409.11435

Hai H. Vo, Nguyen H. Nguyen, Trung V. Phan

引用次数: 0

Federated Learning with Quantum Computing and Fully Homomorphic Encryption: A Novel Computing Paradigm Shift in Privacy-Preserving ML 利用量子计算和全同态加密进行联合学习：保护隐私的多语言计算的新计算范式转变

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-14 DOI: arxiv-2409.11430

Siddhant Dutta, Pavana P Karanth, Pedro Maciel Xavier, Iago Leal de Freitas, Nouhaila Innan, Sadok Ben Yahia, Muhammad Shafique, David E. Bernal Neira

{"title":"Federated Learning with Quantum Computing and Fully Homomorphic Encryption: A Novel Computing Paradigm Shift in Privacy-Preserving ML","authors":"Siddhant Dutta, Pavana P Karanth, Pedro Maciel Xavier, Iago Leal de Freitas, Nouhaila Innan, Sadok Ben Yahia, Muhammad Shafique, David E. Bernal Neira","doi":"arxiv-2409.11430","DOIUrl":"https://doi.org/arxiv-2409.11430","url":null,"abstract":"The widespread deployment of products powered by machine learning models is\u0000raising concerns around data privacy and information security worldwide. To\u0000address this issue, Federated Learning was first proposed as a\u0000privacy-preserving alternative to conventional methods that allow multiple\u0000learning clients to share model knowledge without disclosing private data. A\u0000complementary approach known as Fully Homomorphic Encryption (FHE) is a\u0000quantum-safe cryptographic system that enables operations to be performed on\u0000encrypted weights. However, implementing mechanisms such as these in practice\u0000often comes with significant computational overhead and can expose potential\u0000security threats. Novel computing paradigms, such as analog, quantum, and\u0000specialized digital hardware, present opportunities for implementing\u0000privacy-preserving machine learning systems while enhancing security and\u0000mitigating performance loss. This work instantiates these ideas by applying the\u0000FHE scheme to a Federated Learning Neural Network architecture that integrates\u0000both classical and quantum layers.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0