Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Noise-Aware Synthesis of Quantum LDPC Encoder Circuits via Two-Sided Hamming Descent
Aditya Sodhani, Keshab K. Parhi·Jul 5, 2026
Quantum low-density parity-check (LDPC) codes are a promising route to fault-tolerant quantum computation, but their use requires efficient preparation of encoded states. Standard encoder constructions generate circuits through fixed algebraic proced...
Controlling many-body quantum chaos in a dissipative optical cavity
Filippo Ferrari, Francesca Orsi, Ekaterina Fedotova +4 more·Jul 5, 2026
Cavity quantum electrodynamics (QED) with ultracold fermions provides a promising platform for realizing many-body quantum chaos through disordered, photon-mediated long-range interactions. Such setups are inherently open and are therefore subject to...
Deadline-Bound Finite-Object Delivery over Intermittent LEO Satellite Contact Plans under Residual-Service Accounting
Houtianfu Wang, O. Tansel Baydas, Hanlin Cai +2 more·Jul 5, 2026
Low-Earth-orbit (LEO) relay networks deliver finite objects -- sensing tiles, telemetry blocks, model updates, and checkpoints -- over intermittent inter-satellite and space-to-ground contact plans. Partial delivery is insufficient when the complete ...
Topological properties and Majorana Multiplicity in Zigzag Kitaev Chain
Rajiv Kumar, Panch Ram, Levan Chotorlishvili +1 more·Jul 5, 2026
We investigate the spectral and topological properties of a zigzag Kitaev chain constructed from two diagonally coupled one dimensional Kitaev chains with a zero and finite superconducting pairing phase difference. Using a Bogoliubov-de Gennes formul...
Atomic oven with rapid thermal response for atom experiments
Weilong Huang, Congjun Zou, Feiyu Dong +3 more·Jul 5, 2026
Atomic oven generating controllable atomic beam flux plays a fundamental role in quantum gas experiments. Here, we report a new heater design that can heat up an high temperature atomic oven with fast thermal response. The new heater shows a heating ...
Purcell effect and quantum Zeno effect suppressed self-discharging of quantum battery
Da-Wei Liu, Guoqing Tian, Zi-Hao Li +3 more·Jul 5, 2026
Quantum batteries (QB), as an energy storage and transfer device, not only show obvious advantages compared to classical electrochemical batteries, but also have important applications in quantum information. Self-discharging is a central obstacle to...
Supersymmetry and Entanglement in the Generalized Dirac Oscillator
H. P. Laba, V. M. Tkachuk·Jul 5, 2026
The supersymmetric properties of the generalized Dirac oscillator allow us to determine the entanglement entropy between the spin and the continuous variable in a purely algebraic manner. The entanglement has a relativistic origin and disappears in t...
Fundamental limits on state preparation for an open qubit
D. A. Abraamian, L. V. Lokutsievskiy, A. N. Pechen·Jul 5, 2026
We analytically determine the ultimate limits of state preparation in two-level open quantum systems driven by coherent control. For a dissipative qubit governed by a GKSL master equation, we give an exact characterization of the reachable set in the...
Incompatibility assisted Zeno-like confinement enables unbounded sharing of nonlocality
Prerna Rao, Som Kanjilal·Jul 5, 2026
To enable sequential sharing of Bell-nonlocality by an unbounded number of copies, each copy must satisfy two requirements. First, the measurements must be incompatible to extract nonlocality. Second, the post-processsed state, obtained as an equal m...
Optimal estimation of quantum boundary effect in cosmic string space-time
Yao Jin·Jul 5, 2026
The presence of a cosmic string modifies vacuum fluctuations, making the evolution of a two-level polarizable atom position dependent. Such modifications produce effects on the atomic dynamics analogous to those induced by a reflecting boundary. We s...
Chromatic Completeness and the Independence of Geometric Obstruction
Karl Svozil·Jul 5, 2026
We establish a strict logical separation between two distinct phenomena in orthogonality hypergraphs: chromatic completeness, the possibility of assigning a single globally consistent nondegenerate spectrum to all contexts, and geometric coordinatiza...
Weak ergodicity breaking without nonthermal eigenstates
Boning Huang, Yongguan Ke, Li Zhang +2 more·Jul 5, 2026
The typical mechanisms of ergodicity breaking in isolated interacting quantum systems, such as many-body localization and quantum many-body scars, originate from the nonthermal nature of the underlying eigenstates. Here, in the absence of nonthermal ...
Genuine Multipartite Entanglement between Logical Qubits via Cross-Code Lattice Surgery
Alex Steiner, Tomasz Andrzejewski, Phila Rembold +8 more·Jul 5, 2026
Universal quantum computers are expected to generate arbitrary complex quantum states of logical qubits encoded in many physical qubits. This capability hinges on a fault-tolerantly implemented universal gate set, which no single quantum error-correc...
Uniform mixing and $ε$-uniform mixing on cycles
Xiwang Cao, Cuiwen Zhu·Jul 5, 2026
We study continuous-time quantum walks on cycles. We prove two complementary results. Firstly, the cycle $C_9$ does not admit uniform mixing at any time. Using the similar idea and Dickson polynomials, we prove that $C_{15}$ does not admit uniform mi...
Analytic properties of cross-click operators in passive multi-basis photodetection: monotonicity, exact convergence rates, and dimension reduction for quantum key distribution
Zhangdong Ye·Jul 5, 2026
Cross-click operators, the POVM elements for simultaneous clicks in detectors assigned to different measurement bases, are used in QKD and entanglement-verification analyses with realistic threshold detectors to bound multiphoton contributions. Earli...
Realizing Next-Nearest-Neighbor Coupling and Peierls Phase in Circuits
Xin-Sheng Zhang, Wen-Jie Xu, Hang-Yu Gu +2 more·Jul 5, 2026
We really design the trimerized circuits for the non-Hermitian one-dimensional Su-Schrieffer-Heeger models. There are three models, the initial one just considers the nearest neighbor coupling, the enhanced one is extended to contain the next-nearest...
Infrared Divergences as Itinerant Vacua
Masahiro Morikawa·Jul 5, 2026
Infrared divergences (IRDs) are usually treated as pathologies to be cancelled, regularized, or hidden in dressed asymptotic states. This paper develops a complementary and constructive viewpoint: an IRD is the signature of an \emph{itinerant vacuum}...
Circuit Design Informed Adaptive Variational Quantum Algorithms
Muhammad Umer, Dimitris G. Angelakis·Jul 5, 2026
Resource-efficient computation is of central importance in the noisy intermediate-scale quantum (NISQ) era, where decoherence, gate errors, and restricted qubit connectivity severely limit the reliable execution of quantum algorithms. In this work, w...
ML and AI for density functional theory: different priorities for Kohn-Sham and orbital-free DFT, for electronic and nuclear DFT
Xin-Hui Wu, Sergei Manzhos·Jul 5, 2026
We overview similarities and, importantly, differences in computational bottlenecks and accuracy requirements that can be addressed with machine learning (ML) and artificial intelligence (AI) techniques in electronic and nuclear DFT. From these follo...
Controlling Atom Array in an Ultra-high-cooperativity Optical Cavity
Jilai Ye, Zhihao Chi, Ye Tian +6 more·Jul 5, 2026
Neutral-atom array and cavity quantum electrodynamics offer complementary strengths for quantum science: scalable, reconfigurable qubit architectures and strong coherent light-matter coupling. Combining them in a single platform requires an optical c...