Spin-s U(1)-eigenstate preparationWe formulate a deterministic algorithm for preparing a general U(1)-eigenstate of a spin-s chain of length n. These states consist of linear combinations of computational basis states…Nabi Zare Harofteh, Rafael I. Nepomechie·Aug 4, 2026SaveLearn
Computational complexity of Berry phase estimation in topological phases of matterThe Berry phase is a fundamental quantity in the classification of topological phases of matter. In this paper, we present a new quantum algorithm and several complexity-theoretical results for the…Ryu Hayakawa, Kazuki Sakamoto, Chusei Kiumi·Aug 4, 2026SaveLearn
Improving initial-state-dependent quantum circuit optimization by introducing state labelsWhile the capabilities of quantum hardware have significantly advanced in recent years, executing quantum algorithms as quantum circuits at the lowest possible cost remains crucial, regardless of the…Toshiaki Kaji, Koji Terashi, Ryu Sawada·Aug 4, 2026SaveLearn
Role of overparametrization in quantum approximate optimizationVariational quantum algorithms have emerged as a cornerstone of contemporary quantum algorithms research. While they have demonstrated considerable promise in solving problems of practical interest,…Daniil Rabinovich, Andrey Kardashin, Soumik Adhikary·Aug 4, 2026SaveLearn
Enhancing ground-state cooling of center-of-mass motions via quantum squeezing from magnon nonlinearityCooling massive oscillators to quantum ground state is an essential prerequisite for their precise control, quantum memory, and quantum ultrasensitive measurement, etc. In a cavity-magnomechanical…Jiate Xu, Xinqian Cui, Guolong Li·Aug 4, 2026SaveLearn
Monotonicity of the von Neumann Entropy under Quantum ConvolutionThe quantum entropy power inequality, proven by König and Smith (2012), states that (S(ρ σ)/m)≥ 12 ((S(ρ)/m) + (S(σ)/m)) for two m-mode bosonic quantum states ρ and…Salman Beigi, Hami Mehrabi·Aug 4, 2026SaveLearn
Tight and self-testing multipartite quantum Bell inequalities from the renormalization groupIn past work, the concept of connectors was introduced: directed tensors with the property that any contraction thereof defines a multipartite quantum Bell inequality, i.e., a linear restriction on…Paolo Abiuso, Julian Fischer, Miguel Navascués·Aug 4, 2026SaveLearn
Efficient quantum-enhanced classical simulation for patches of quantum landscapesUnderstanding the capabilities of classical simulation methods is key to identifying where quantum computers are advantageous. Not only does this ensure that quantum computers are used only where…Sacha Lerch, Ricard Puig, Manuel S. Rudolph et al.·Aug 4, 2026SaveLearn
Quantum CORDIC -- Arcsine on a BudgetThis work introduces a quantum algorithm for computing the function arcsine, with arbitrary accuracy. We leverage a technique from embedded computing and field-programmable gate arrays, called…Iain Burge, Michel Barbeau, Joaquin Garcia-Alfaro·Aug 4, 2026SaveLearn
Disorder-Induced Entanglement Phase Transitions in Non-Hermitian Systems with Skin EffectsNon-Hermitian dynamics is ubiquitous in various physical systems. While recent study shows that such a dynamics leads to an area-law scaling of the entanglement entropy due to the non-Hermitian skin…Kai Li, Ze-Chuan Liu, Yong Xu·Aug 4, 2026SaveLearn
The Utility of Sparse Error Detection in Quantum SimulationsThe recent success of error detecting codes points toward their potential application to fault-tolerant simulations of nature. In this work, we examine the utility of sparse error detection for…Henry Froland, Dorota M. Grabowska, Sebastian Grieninger et al.·Aug 3, 2026SaveLearn
Quantum-Limited Blind Source Separation of Classical LightUsing the framework of quantum multiparameter estimation, we study the problem of separating independent thermal optical sources mixed by an unknown passive linear transformation, which is known as…Janis Nötzel, Kiran Adhikari·Aug 3, 2026SaveLearn
Heisenberg scaling under collective non-parallel directional noise via geometric state designSpin-squeezed states enable entanglement-enhanced frequency estimation; however, the achievable performance is limited in practice by decoherence. We study the problem of parameter estimation under…Francisco Riberi, Lorenza Viola, Milad Marvian·Aug 3, 2026SaveLearn
A First-principles Computational Framework for Quantum Decoherence in Complex Diamond Spin EnvironmentsQuantum decoherence induced by defects remains a major limitation for solid-state quantum technologies, yet predicting decoherence in realistic materials remains computationally challenging. Complex…Huijin Park, Ha-young Jeong, Hyeonsu Kim et al.·Aug 3, 2026SaveLearn
Improved Quantum Algorithms for Reinforcement Learning Under a Generative ModelReinforcement learning is a subfield of machine learning that studies how an agent interacts with an environment in order to extract as large a reward as possible. A standard approach to study such…Joao F. Doriguello·Aug 3, 2026SaveLearn
PaQit: Energy-Runtime-Fidelity Co-Optimization for Neutral Atom Quantum ComputersNeutral-atom quantum computers provide a scalable platform for large-scale quantum computation due to their all-optical control, room-temperature operation, and flexible lattice geometry. Although…Jason Ludmir, Tirthak Patel·Aug 3, 2026SaveLearn
PACE-QAOA: Physics-Constrained Quantum Optimization for Qubit-Efficient Power System IslandingIncreasing renewable-energy penetration heightens power-system variability and complicates disturbance containment. Controlled islanding mitigates cascading failures by partitioning a stressed…Yuqi Jiang, Zhiding Liang, Qiang Guan et al.·Aug 3, 2026SaveLearn
Energy levels of the second-harmonic Hamiltonian at large photon numbersWe study the energy spectrum of the degenerate χ(2) Hamiltonian describing second-harmonic generation and parametric down-conversion at large total excitation numbers. Owing to the conservation…Boulat Nougmanov·Aug 3, 2026SaveLearn
QuScope: An Open-Source Python Framework for Quantum-Circuit Simulation of Transmission Electron MicroscopyImage formation in transmission electron microscopy (TEM) is governed by the coherent evolution of the electron wavefunction through the specimen and the objective lens. This physics maps naturally…Sean D. Lam, Roberto dos Reis·Aug 3, 2026SaveLearn
Quantum error correction at ultra-low overheadSuppressing errors is the central challenge for useful large-scale quantum computing. While quantum error correction promises a viable solution to this challenge, existing codes typically suffer from…Zhide Lu, Weikang Li, Dong-Ling Deng·Aug 3, 2026SaveLearn
Dynamic Induction of Lattice Gauge Theories on a Quantum ComputerGauge invariance is central to modern physics and underpins quantum simulations of lattice gauge theories (LGTs). Existing quantum simulation approaches employ Gauss's law either to energetically…Barbara Andrade, Declan Millar, Lewis Anderson et al.·Aug 3, 2026SaveLearn
Improved constant factors for qubitized Hamiltonian simulationQuantum signal processing (QSP) serves as the asymptotically optimal technique for Hamiltonian simulation on a quantum computer. By approximating the time evolution operator via the Jacobi-Anger…Matthew Pocrnic, Danial Motlagh·Aug 3, 2026SaveLearn
Unweighted Gapped Clique Homology is QMA1-completeDeciding whether the clique complex of a given graph has nontrivial homology in a given dimension, under vertex-product weighting and an inverse-polynomial spectral gap promise on the combinatorial…Ryu Hayakawa·Aug 3, 2026SaveLearn
Structure of matrix product locally purifiable density operatorsTensor network methods provide powerful analytical and numerical tools for characterizing quantum phases of matter. While the mathematical structure of matrix product states (MPS) is well understood…Yale Yauk, Yuhan Liu, Ignacio Cirac·Aug 3, 2026SaveLearn
A Unified Complexity Framework for Quantum Property TestingWe develop a unified framework for analyzing the complexity of quantum property testing through functionals of the form Lϕ(ρ) = tr(ϕ(dρ))/d, where ρ is an unknown…Qisheng Wang·Aug 3, 2026SaveLearn