arXiv - PHYS - Quantum Physics最新文献_第2页

Towards practical secure delegated quantum computing with semi-classical light 利用半经典光实现实用安全的委托量子计算

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.12103

Boris Bourdoncle, Pierre-Emmanuel Emeriau, Paul Hilaire, Shane Mansfield, Luka Music, Stephen Wein

{"title":"Towards practical secure delegated quantum computing with semi-classical light","authors":"Boris Bourdoncle, Pierre-Emmanuel Emeriau, Paul Hilaire, Shane Mansfield, Luka Music, Stephen Wein","doi":"arxiv-2409.12103","DOIUrl":"https://doi.org/arxiv-2409.12103","url":null,"abstract":"Secure Delegated Quantum Computation (SDQC) protocols are a vital piece of\u0000the future quantum information processing global architecture since they allow\u0000end-users to perform their valuable computations on remote quantum servers\u0000without fear that a malicious quantum service provider or an eavesdropper might\u0000acquire some information about their data or algorithm. They also allow\u0000end-users to check that their computation has been performed as they have\u0000specified it. However, existing protocols all have drawbacks that limit their usage in the\u0000real world. Most require the client to either operate a single-qubit source or\u0000perform single-qubit measurements, thus requiring them to still have some\u0000quantum technological capabilities albeit restricted, or require the server to\u0000perform operations which are hard to implement on real hardware (e.g isolate\u0000single photons from laser pulses and polarisation-preserving photon-number\u0000quantum non-demolition measurements). Others remove the need for quantum\u0000communications entirely but this comes at a cost in terms of security\u0000guarantees and memory overhead on the server's side. We present an SDQC protocol which drastically reduces the technological\u0000requirements of both the client and the server while providing\u0000information-theoretic composable security. More precisely, the client only\u0000manipulates an attenuated laser pulse, while the server only handles\u0000interacting quantum emitters with a structure capable of generating spin-photon\u0000entanglement. The quantum emitter acts as both a converter from coherent laser\u0000pulses to polarisation-encoded qubits and an entanglement generator. Such\u0000devices have recently been used to demonstrate the largest entangled photonic\u0000state to date, thus hinting at the readiness of our protocol for experimental\u0000implementations.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248074","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

Spin amplification in realistic systems 现实系统中的自旋放大

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.11956

Ivan Iakoupov, Victor M. Bastidas, Yuichiro Matsuzaki, Shiro Saito, William J. Munro

引用次数: 0

Operator-Projected Variational Quantum Imaginary Time Evolution 算子投影变分量子虚时间演化

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.12018

Aeishah Ameera Anuar, Francois Jamet, Fabio Gironella, Fedor Simkovic IV, Riccardo Rossi

引用次数: 0

A no-go theorem for sequential and retro-causal hidden-variable theories based on computational complexity 基于计算复杂性的顺序和逆因果隐变量理论的禁区定理

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.11792

Doriano Brogioli

{"title":"A no-go theorem for sequential and retro-causal hidden-variable theories based on computational complexity","authors":"Doriano Brogioli","doi":"arxiv-2409.11792","DOIUrl":"https://doi.org/arxiv-2409.11792","url":null,"abstract":"The celebrated Bell's no-go theorem rules out the hidden-variable theories\u0000falling in the hypothesis of locality and causality, by requiring the theory to\u0000model the quantum correlation-at-a-distance phenomena. Here I develop an\u0000independent no-go theorem, by inspecting the ability of a theory to model\u0000quantum emph{circuits}. If a theory is compatible with quantum mechanics, then\u0000the problems of solving its mathematical models must be as hard as calculating\u0000the output of quantum circuits, i.e., as hard as quantum computing. Rigorously,\u0000I provide complexity classes capturing the idea of sampling from sequential\u0000(causal) theories and from post-selection-based (retro-causal) theories; I show\u0000that these classes fail to cover the computational complexity of sampling from\u0000quantum circuits. The result is based on widely accepted conjectures on the\u0000superiority of quantum computers over classical ones. The result represents a\u0000no-go theorem that rules out a large family of sequential and\u0000post-selection-based theories. I discuss the hypothesis of the no-go theorem\u0000and the possible ways to circumvent them. In particular, I discuss the Schulman\u0000model and its extensions, which is retro-causal and is able to model quantum\u0000correlation-at-a-distance phenomena: I provides clues suggesting that it\u0000escapes the hypothesis of the no-go theorem.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248077","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

Multifold Majorana corner modes arising from multiple pairs of helical edge states 多对螺旋边缘态产生的多折叠马约拉纳角模式

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.11791

Zhiwei Yin, Haoshu Li, Zhongbo Yan, Shaolong Wan

{"title":"Multifold Majorana corner modes arising from multiple pairs of helical edge states","authors":"Zhiwei Yin, Haoshu Li, Zhongbo Yan, Shaolong Wan","doi":"arxiv-2409.11791","DOIUrl":"https://doi.org/arxiv-2409.11791","url":null,"abstract":"Quantum spin Hall insulators with a pair of helical edge states and\u0000proximity-induced superconductivity have been shown to support second-order\u0000topological superconductors with Majorana corner modes. As the Majorana corner\u0000modes are originated from the helical edge states of the quantum spin Hall\u0000insulators, whether quantum spin Hall insulators with multiple pairs of helical\u0000edge states and proximity-induced superconductivity can give rise to\u0000second-order topological superconductors with multifold Majorana corner modes\u0000is an interesting question to address. In this work, we consider a quantum spin\u0000Hall insulator with two pairs of helical edge states. We find robust twofold\u0000Majorana corner modes can be achieved when the helical edge states are gapped\u0000by a combined action of a magnetic exchange field and an $s$-wave pairing, or\u0000an $s+p$ mixed-parity pairing. The stability of two Majorana zero modes per\u0000corner under the action of magnetic exchange fields is attributed to the\u0000protection from the chiral symmetry. Our study reveals that heterostructures\u0000composed of superconductors and quantum spin Hall insulators with multiple\u0000pairs of helical edge states could serve as a platform to pursue multifold\u0000Majorana corner modes.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248115","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

Performance advantage of protective quantum measurements 保护性量子测量的性能优势

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.12174

Maximilian Schlosshauer

引用次数: 0

Mechanical Wannier-Stark Ladder of Diamond Spin-Mechanical Lamb Wave Resonators 金刚石自旋机械兰姆波谐振器的机械万尼尔-斯塔克梯形图

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.12149

Philip Andrango, Hailin Wang

引用次数: 0

The Cramér-Rao approach and global quantum estimation of bosonic states 克拉梅尔-拉奥方法和玻色态的全局量子估计

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.11842

Masahito Hayashi, Yingkai Ouyang

引用次数: 0

QUBO-based SVM for credit card fraud detection on a real QPU 基于 QUBO 的 SVM 在真实 QPU 上进行信用卡欺诈检测

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.11876

Ettore Canonici, Filippo Caruso

{"title":"QUBO-based SVM for credit card fraud detection on a real QPU","authors":"Ettore Canonici, Filippo Caruso","doi":"arxiv-2409.11876","DOIUrl":"https://doi.org/arxiv-2409.11876","url":null,"abstract":"Among all the physical platforms for the realization of a Quantum Processing\u0000Unit (QPU), neutral atom devices are emerging as one of the main players. Their\u0000scalability, long coherence times, and the absence of manufacturing errors make\u0000them a viable candidate.. Here, we use a binary classifier model whose training\u0000is reformulated as a Quadratic Unconstrained Binary Optimization (QUBO) problem\u0000and implemented on a neutral atom QPU. In particular, we test it on a Credit\u0000Card Fraud (CCF) dataset. We propose several versions of the model, including\u0000exploiting the model in ensemble learning schemes. We show that one of our\u0000proposed versions seems to achieve higher performance and lower errors,\u0000validating our claims by comparing the most popular Machine Learning (ML)\u0000models with QUBO SVM models trained with ideal, noisy simulations and even via\u0000a real QPU. In addition, the data obtained via real QPU extend up to 24 atoms,\u0000confirming the model's noise robustness. We also show, by means of numerical\u0000simulations, how a certain amount of noise leads surprisingly to enhanced\u0000results. Our results represent a further step towards new quantum ML algorithms\u0000running on neutral atom QPUs for cybersecurity applications.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248076","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

Quasiperiodic Floquet-Gibbs states in Rydberg atomic systems 雷德贝格原子系统中的准周期弗洛克-吉布斯态

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-18 DOI: arxiv-2409.12044

Wilson S. Martins, Federico Carollo, Kay Brandner, Igor Lesanovsky

引用次数: 0