Skip to content

Quantum Physics papers — page 168

quant-phBrowse archive

QR-SPPS: Quantum-Native Retail Shock Propagation and Policy Stress Simulator
Classical supply chain risk models treat node failures as statistically independent events, systematically underestimating correlated cascade failures across multi-tier supplier networks. We present…
Sumit Tapas ChongderJul 21, 2026
Learn
Circuit complexity lower bounds for quantum spin glasses
A central question in quantum information theory is the circuit complexity of states arising from standard many-body models. We study this question for quantum p-spin glasses, random Hamiltonians…
Omar Al-Ghattas, David GamarnikJul 21, 2026
Learn
Biased-Noise Quantum Reed-Solomon Codes and a Tornado Concatenation for Cat Qubits
Dissipative cat qubits exponentially suppress one Pauli error channel with the mean photon number, leaving the conjugate bit-flip error as the dominant failure mode. This strong noise bias makes the…
Cheng-You Ho, Daniel Wang, Simba Shi et al.Jul 21, 2026
Learn
Unbiased Estimation of Conditional Covariance for Quantum Optomechanics
Continuous measurements can prepare macroscopic mechanical oscillators in conditional quantum states, but their covariance is difficult to verify. The conventional retrodictive estimator assumes a…
Katsuta Sakai, Nobuyuki MatsumotoJul 21, 2026
Learn
Generating one-way computations with flow: flow-preserving rewriting that ignores the interpretation
The one-way model is a universal model of quantum computation, driven by successive adaptive single-qubit measurements on an entangled resource state. Measurements are non-deterministic, yet if the…
Miriam BackensJul 21, 2026
Learn
Can a Measurement Be Undone? Recovering the State of a Measured Microscopic System with a Reversible Measuring Apparatus
We propose a direct, model-independent search for irreversible coherence loss during a reversible measurement. A mesoscopic apparatus measures a microscopic two-state system by storing which-state…
Peter RenkelJul 21, 2026
Learn
Bell inequalities tailored to optimal global randomness certification
We present two novel families of bipartite Bell inequalities designed to achieve optimal global randomness certification for an arbitrary number of outputs d. We first use symmetry arguments to…
Ignacio Perito, Raffaele D'Avino, Michał Jung et al.Jul 21, 2026
Learn
Comparing Classical Simulation and Sample-Based Learning of Quantum Systems
We investigate the relationship between two distinct classical approaches to quantum systems: direct simulation from a classical description and sample-based learning from measurement data. While…
João Pedro d'El-Rey, Raúl O. Vallejos, Fernando de MeloJul 21, 2026
Learn
SAFE ma-QAOA: Surrogate-Assisted and Fine-Tuning Enhanced Multi-Angle QAOA with Parameter Distillation
The multi-angle Quantum Approximate Optimization Algorithm (ma-QAOA) extends the Quantum Approximate Optimization Algorithm (QAOA) by assigning a larger number of independent variational parameters,…
Hyunwoo Kim, Youngseok LeeJul 21, 2026
Learn
Simulation of Non-Hermitian Hamiltonians with Bivariate Quantum Signal Processing
We achieve query-optimal quantum simulations of non-Hermitian Hamiltonians Heff = HR + iHI, where HR is Hermitian and HI 0, using a bivariate extension of quantum signal…
Joshua M. CourtneyJul 21, 2026
Learn
Information in Many-body Eigenstates: A Question of Learnability
To what extent do individual eigenstates encode information about their parent Hamiltonian, and how does this encoding vary across the spectrum? We introduce learnability as a new framework to…
Maksymilian Kliczkowski, Jarosław Pawłowski, Masudul HaqueJul 21, 2026
Learn
Branch-Resolved Characterization of Feed-Forward Error in Dynamic Teleportation via Classical Choi Shadows
Mid-circuit measurement and classical feed-forward are essential primitives for dynamic-circuit teleportation on superconducting quantum processors. However, the error associated with…
Mason Edwards, Prabhat MishraJul 21, 2026
Learn
Dual-use quantum hardware for quantum resource generation and energy storage
Efficient generation of quantum resources is a central objective of modern quantum technological platforms. Independently, quantum batteries have emerged as nanoscale devices that utilize collective…
Vaibhav Sharma, Yiming Wang, Shouvik SurJul 21, 2026
Learn
Adiabatic Error Cancellation in Berry Phase Estimation
The Berry phase encodes the geometry of a closed Hamiltonian path, complementing the dynamical phase determined by the accumulated energy. We uncover an adiabatic error-cancellation principle that…
Chusei KiumiJul 21, 2026
Learn
Efficient optimisation of multi-parameter quantum control protocols for strongly-coupled systems
Achieving high-fidelity control in the presence of strong non-Markovian noise is critical for the optimization of emergent solid-state quantum devices. We present a highly efficient optimization…
Sion Meredith, Oliver Dudgeon, Wojciech Bukalski et al.Jul 21, 2026
Learn
Comparison of the standard and dressed-picture master equations for the quantum Rabi model in the ultrastrong coupling regime
The goal of this chapter is to investigate the effects of relaxation and dephasing on the quantum Rabi model in the ultrastrong coupling regime, and to provide explicit formulas that enable students…
Alexandre P. Costa, Hebert S. Rego de Oliveira, Alexandre DodonovJul 21, 2026
Learn
Deterministic quantum master equation for non-Markovian signal processing
In this work, we derive a deterministic master equation to model a general, possibly non-Markovian, feedback. The master equation describes a system with a general evolution and measurement…
Guilherme de Sousa, Diogo O. Soares-PintoJul 21, 2026
Learn
Neural Belief-Matching Decoding for Topological Quantum Error Correction Codes
Quantum error correction (QEC) is critical for scalable fault-tolerant quantum computing. Topological codes, such as the toric code, offer hardware-efficient architectures but their Tanner graphs…
Luca Menti, Francisco LázaroJul 21, 2026
Learn
Focusing Surface-Acoustic-Wave Resonators on Thin-Film Lithium Niobate with Transverse-Mode Suppression
Surface-acoustic-wave (SAW) resonators are a promising platform for constructing hybrid quantum systems, where confined acoustic waves enable strong interaction with various physical systems.…
Ryo Sasaki, Ryusuke Hisatomi, Rekishu Yamazaki et al.Jul 21, 2026
Learn
Edge-Local and Qubit-Efficient Quantum Graph Learning for the NISQ Era
Graph neural networks (GNNs) are a powerful framework for learning representations from graph-structured data, but their direct implementation on near-term quantum hardware remains challenging due to…
Armin Ahmadkhaniha, Jake DoliskaniJul 21, 2026
Learn
Nonlocality without entanglement in exclusion of quantum states
We study the task of quantum state exclusion, focusing on antidistinguishability and its generalization to x-antidistinguishability, under global measurements and local operations with classical…
Satyaki Manna, Anandamay Das BhowmikJul 21, 2026
Learn
Payoff-Free Coordination Reveals Hidden Quantum Correlation Structure
We study decentralized multi-agent coordination where agents must correlate actions against an unobserved field and cannot communicate. To isolate correlation geometry from payoff optimization, we…
Sinan BuguJul 21, 2026
Learn
The rate of purification of quantum trajectories
We investigate the behavior of quantum trajectories conditioned on measurement outcomes. Under a condition related to the absence of so-called dark subspaces, Kümmerer and Maassen had shown that such…
Maël Bompais, Nina H. Amini, Juan P. Garrahan et al.Jul 21, 2026
Learn
Higher Josephson harmonics in a tunable double-junction transmon qubit
Tunable Josephson harmonics open new avenues for qubit design. We demonstrate a superconducting circuit element consisting of a tunnel junction in series with a SQUID loop, yielding a Josephson…
Ksenia Shagalov, David Feldstein-Bofill, Leo Uhre Jakobsen et al.Jul 21, 2026
Learn
Local Equivalences of Graph States
Graph states form a large family of quantum states that are in one-to-one correspondence with mathematical graphs. Graph states are used in many applications, such as measurement-based quantum…
Nathan ClaudetJul 21, 2026
Learn
← PreviousPage 168Next →