Quantum Science and Technology最新文献

Bell state measurements in quantum optics: a review of recent progress and open challenges 量子光学中的贝尔态测量：最新进展和公开挑战的回顾

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-27 DOI: 10.1088/2058-9565/ae609e

Luca Bianchi, Carlo Marconi and Davide Bacco

引用次数: 0

Entanglement percolation in random quantum networks 随机量子网络中的纠缠渗透

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-23 DOI: 10.1088/2058-9565/ae5fca

Alessandro Romancino, Jordi Romero-Pallejá, G Massimo Palma and Anna Sanpera

引用次数: 0

Enhancing quantum clocks and sensors with randomization and decoherence 利用随机化和退相干增强量子时钟和传感器

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-23 DOI: 10.1088/2058-9565/ae5fc8

Luis Pedro García-Pintos

引用次数: 0

Symmetry-guided quantum state preparation: branched-subspaces adiabatic preparation (B-SAP) 对称引导量子态制备：分支子空间绝热制备（B-SAP）

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-22 DOI: 10.1088/2058-9565/ae5ad0

Davide Cugini, Giacomo Guarnieri, Mario Motta and Dario Gerace

引用次数: 0

Erratic Liouvillian skin localization and subdiffusive transport 不稳定的刘氏皮肤定位和亚扩散运输

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-22 DOI: 10.1088/2058-9565/ae5fcb

Stefano Longhi

{"title":"Erratic Liouvillian skin localization and subdiffusive transport","authors":"Stefano Longhi","doi":"10.1088/2058-9565/ae5fcb","DOIUrl":"https://doi.org/10.1088/2058-9565/ae5fcb","url":null,"abstract":"Non-Hermitian (NH) systems with globally reciprocal couplings—such as the Hatano–Nelson model with stochastic imaginary gauge fields—avoid the conventional NH skin effect, displaying erratic bulk localization while retaining ballistic transport. An open question is whether similar behavior arises when non-reciprocity originates at the Liouvillian level rather than from an effective NH Hamiltonian obtained via post-selection. Here, a lattice model with globally reciprocal Liouvillian dynamics and locally asymmetric incoherent hopping is investigated, a disordered setting in which Liouvillian-specific effects have remained largely unexplored. While the steady state again shows disorder-dependent, erratic localization without boundary accumulation, excitations in the incoherent-hopping regime spread via Sinai-type subdiffusion, dramatically slower than ordinary diffusion in symmetric stochastic lattices. This highlights that the genuinely distinct Liouvillian signature is the coexistence of global reciprocity with ultra-slow, disorder-induced subdiffusive transport, rather than the erratic localization itself. These results reveal a fundamental distinction between globally reciprocal Hamiltonian and Liouvillian systems: in both cases the skin effect is suppressed, but only in Liouvillian dynamics erratic skin localization can coexist with subdiffusive transport.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"117 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147736605","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: 0

Quantum nonlinear parametric interaction in realistic waveguides: a comprehensive study 现实波导中量子非线性参数相互作用的综合研究

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-20 DOI: 10.1088/2058-9565/ae59ac

Tim F Weiss, Akram Youssry and Alberto Peruzzo

{"title":"Quantum nonlinear parametric interaction in realistic waveguides: a comprehensive study","authors":"Tim F Weiss, Akram Youssry and Alberto Peruzzo","doi":"10.1088/2058-9565/ae59ac","DOIUrl":"https://doi.org/10.1088/2058-9565/ae59ac","url":null,"abstract":"Nonlinear sources of quantum light are foundational to a majority of optical quantum technologies and are actively advancing toward real-world deployment. Achieving this goal requires fabrication capabilities to be scaled to industrial standards, necessitating precise modeling tools that can both guide device design within realistic fabrication constraints and enable accurate post-fabrication characterization. In this paper, building on existing work, we introduce a modeling framework that explicitly integrates the engineering tools used for designing classical properties of integrated waveguides with quantum mechanical theory describing the underlying nonlinear interactions. We analyze the validity and limitations of approximations relevant to this framework and apply it to comprehensively study how typical fabrication errors and deviations from nominal design—common in practical waveguide manufacturing—affect the nonlinear optical response. Our findings highlight, in particular, a critical sensitivity of the framework to group-velocity dispersion, the potentially highly disruptive role of geometric inhomogeneities in the waveguide, and an upper bound on uncorrelated squeezed-state generation arising from asymmetric group-velocity matching conditions.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147726885","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: 0

Non-Gaussian quantum state engineering with postselected von Neumann measurements 后选择冯·诺依曼测量的非高斯量子态工程

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-13 DOI: 10.1088/2058-9565/ae5acf

Xiao-Xi Yao and Yusuf Turek

引用次数: 0

Integrability of Goldilocks quantum cellular automata Goldilocks量子细胞自动机的可积性

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-12 DOI: 10.1088/2058-9565/ae57d5

Logan E Hillberry, Lorenzo Piroli, Eric Vernier, Nicole Yunger Halpern, Tomaž Prosen and Lincoln D Carr

{"title":"Integrability of Goldilocks quantum cellular automata","authors":"Logan E Hillberry, Lorenzo Piroli, Eric Vernier, Nicole Yunger Halpern, Tomaž Prosen and Lincoln D Carr","doi":"10.1088/2058-9565/ae57d5","DOIUrl":"https://doi.org/10.1088/2058-9565/ae57d5","url":null,"abstract":"Goldilocks quantum cellular automata (QCA) have been simulated on quantum hardware and produce emergent small-world correlation networks. In Goldilocks QCA, a single-qubit unitary is applied to each qubit in a one-dimensional chain subject to a balance constraint: a qubit is updated if its neighbors are in different computational-basis states. We prove that a subclass of Goldilocks QCA, including the QCA implemented experimentally, map to free fermions and therefore can be simulated classically. We support this claim with two proofs, one involving a Jordan–Wigner transformation and one mapping the integrable six-vertex model to QCA. We compute local conserved quantities of these QCA and predict experimentally measurable expectation values. These calculations can be applied to test large digital quantum computers. In contrast, typical Goldilocks QCA have equilibration properties and quasienergy-level statistics that suggest nonintegrability. Still, each of the latter QCA conserves one quantity useful for error mitigation. Our work yields a parametric quantum circuit with tunable integrability properties useful for testing quantum hardware.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"2 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147664138","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: 0

Quantum optimization with classical chaos 经典混沌的量子优化

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-12 DOI: 10.1088/2058-9565/ae59ad

Malick A Gaye, Omar Shehab, Paraj Titum and Gregory Quiroz

{"title":"Quantum optimization with classical chaos","authors":"Malick A Gaye, Omar Shehab, Paraj Titum and Gregory Quiroz","doi":"10.1088/2058-9565/ae59ad","DOIUrl":"https://doi.org/10.1088/2058-9565/ae59ad","url":null,"abstract":"The quantum approximate optimization algorithm (QAOA) is a powerful tool in solving various combinatorial problems such as maximum satisfiability and maximum cut. Hard computational problems, however, require deep circuits that place high demands on classical variational parameter optimization. Ultimately, this has necessitated investigations into alternative methods for effective QAOA parameterizations. Here, we study a parameterization scheme based on classical chaotic recursive mapping, which enables significant reductions in the scaling of the variational parameter space. Through numerical investigations of hard maximum satisfiability problems, we demonstrate that the chaotic mapping can effectively match the performance of standard QAOA when subject to a limited number of classical optimization iterations and short-depth circuits. Insight into this behavior is elucidated through the lens of classical dynamical systems and used to inform hybridized schemes that leverage both standard and chaotic parameterizations. It is shown that these hybridized approaches can boost QAOA performance beyond that of the standard approach alone, especially for deep circuits. Through this study, we provide a new perspective that introduces a generalized framework for specifying performant, dynamical-map-based QAOA parameterizations.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"8 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147664158","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: 0

Full programmable quantum computing with trapped-ions using semi-global fields 全可编程量子计算，利用半全局场捕获离子

IF 6.7 2区物理与天体物理

Quantum Science and Technology Pub Date : 2026-04-07 DOI: 10.1088/2058-9565/ae573c

Yakov Solomons, Yotam Kadish, Lee Peleg, Jonathan Nemirovsky, Amit Ben Kish and Yotam Shapira

{"title":"Full programmable quantum computing with trapped-ions using semi-global fields","authors":"Yakov Solomons, Yotam Kadish, Lee Peleg, Jonathan Nemirovsky, Amit Ben Kish and Yotam Shapira","doi":"10.1088/2058-9565/ae573c","DOIUrl":"https://doi.org/10.1088/2058-9565/ae573c","url":null,"abstract":"Trapped-ion quantum computing can utilize all motional modes of the ion-crystal, to entangle multiple qubits simultaneously, enabling universal computation with multi-qubit gates supplemented by single-qubit rotations. Using multiple tones to drive each ion individually induces Ising-type interactions, forming a multi-qubit gate, where the coupling matrix of all ion pairs is fully controllable. This reduces the total gate count while maintaining high fidelity, as opposed to traditional methods that rely on a single type of two-qubit gate, such as the well-known Mølmer–Sørensen gate. However, scaling to large ion chains, individual addressing can be technically challenging in terms of optical delivery and signal generation. We explore global and semi-global drives combined with single-qubit flips and show that these can reproduce the full set of multi-qubit gates. Although optimizing the combination of single-qubit flips is a computationally hard problem, we propose an efficient scheme to implement any desired couplings in large ion chains, yielding a concatenation scheme that uses at most multi-qubit gates, with N being the number of ions. In addition, we show that by using B < N independent semi-global fields, each driving a set of ions, the number of maximal multi-qubit gates is reduced to approximately . We show how to design the driving fields that support these schemes and investigate their properties. Our results pave the way for efficient implementations of quantum algorithms in large-scale trapped-ion quantum systems.","PeriodicalId":20821,"journal":{"name":"Quantum Science and Technology","volume":"18 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147630764","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: 0