Papers
Live trends in quantum computing research, updated daily from arXiv.
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Entanglement Wedge Reconstruction without Holographic Quantum Error Correction
Seiji Terashima·Jul 9, 2026
Bulk reconstruction is a central problem in AdS/CFT, and entanglement wedge reconstruction is its subregion version. We argue that this subregion statement should be separated from the stronger holographic quantum error correction interpretation, in ...
SolarChain-Eval: A Physics-Constrained Benchmark for Trustworthy Economic Agents in Decentralized Energy Markets
Shilin Ou, Yifan Xu, Luyao Zhang·Jul 9, 2026
As agentic AI systems are increasingly applied to cyber-physical environments, their evaluation requires assessment of both task performance and trustworthiness. In decentralized energy markets, autonomous agents may improve market utility, but may a...
Temperature Beyond Equilibrium in Isolated Quantum Many-Body Systems and Their Subsystems
Maurizio Fagotti·Jul 9, 2026
Temperature is one of the central concepts of thermodynamics, yet its meaning away from equilibrium remains elusive. This problem is particularly acute in isolated quantum many-body systems: their states evolve unitarily, need not be close to equilib...
Extracting conformal data from Loschmidt echoes after critical quenches
Aleix Bou-Comas, Stefano Carignano, Sergio Cerezo-Roquebrún +2 more·Jul 9, 2026
Conformal field theory provides universal predictions for Loschmidt amplitudes following quenches from product states to critical Hamiltonians. Building on this observation, we develop a route to extracting conformal data from real-time dynamics with...
Symmetry as a route to generalized bosonic Kitaev chains
Gideon Lee, Tony Jin, Aashish A. Clerk·Jul 9, 2026
The bosonic Kitaev chain (BKC) model is a deceptively simple looking quadratic pairing Hamiltonian. Despite being purely Hermitian, it exhibits a number of striking non-Hermitian topological phenomena, including skin effects. We show here how symmetr...
GroverFigureOfMerit: An Agnostic Figure of Merit for Quantum Backend Characterization in the NISQ Era
Tiago Restucha, Marcos Guillermo Lammers, Alejandro Fernández·Jul 9, 2026
The Noisy Intermediate-Scale Quantum (NISQ) era poses a challenge for developers: hardware providers expose capabilities through heterogeneous interfaces with proprietary metrics varying widely across providers, hindering informed backend selection. ...
Triangulene-based diradicals as a blueprint for molecular quantum platforms with optical addressability and long spin coherence times
Arup Sarkar, Cathal Hogan, Conor Ryan +2 more·Jul 9, 2026
The identification of molecules that combine long spin coherence times and efficient spin-optical interfaces, ideally at room temperature, is pivotal towards the development of molecular quantum technology. By means of advanced first-principles metho...
A Nonstabilizerness Resource Law for Universal Quantum State Purification
Keming He, Enji Xiong, Xin Wang·Jul 9, 2026
Quantum state purification aims to recover higher-fidelity quantum states from multiple noisy copies and is a fundamental primitive for quantum information processing. Magic resources enable operations beyond classically simulable dynamics and are ce...
Operational meaning of Markov gap in tripartite entanglement of quantum dynamics
Zongsheng Zhou, Riqiang Zhang, Yu-Xiang Zhang·Jul 9, 2026
We investigate how irreducible multipartite entanglement, a long-range correlation by nature, can emerge from short-range dynamics far from equilibrium. Focusing on the Markov gap as a probe of irreducible tripartite entanglement (IrTE) in free-fermi...
Distributed Monogamy of Entanglement limits Quantum Channel Simulation
Rabsan Galib Ahmed, Graeme Smith·Jul 9, 2026
Entanglement is monogamous: if it is shared among more than two parties, the entanglement between any pair cannot be very strong. For an integer $k\geq 2$, $k$-extendibility of a state $ρ_{AB}$ quantifies this as the number of copies of $B$ that can ...
Universality of Measurement-Induced Criticality under Symmetry-Breaking Measurements
Angelo Russotto, Filiberto Ares, Pasquale Calabrese·Jul 9, 2026
We study the critical properties of random quantum circuits with a $U(1)$ symmetry subject to local projective measurements that explicitly break this symmetry. We find that, at the measurement-induced phase transition, symmetry-breaking measurements...
Holographic Theory of Mixed-Dimensional Statistics and Conservation-Encoding Hopping-Operator Algebras
Hanyu Xue, Xiao-Gang Wen·Jul 9, 2026
We develop a general framework for the statistics of mixed-dimensional excitations subject to intertwined conservation laws, extending the familiar Fermi statistics with conserved particle number. We define statistics microscopically through a \emph{...
Renormalization flows for 1D mixed states and a quantum Goursat lemma
Léo Le-Nestour, David Pérez-García, Alberto Ruiz-de-Alarcón·Jul 9, 2026
Renormalization provides a framework for relating microscopic models of physical systems to effective descriptions at larger length scales. This procedure is studied for the boundary states of non-chiral two-dimensional topologically ordered models. ...
QSCOUT's Qubit-Boson Gate Set
Edward C. Tortorici, Ethan C. McGarrigle, Brian K. McFarland +6 more·Jul 9, 2026
The Quantum Scientific Computing Open User Testbed (QSCOUT) has developed a qubit-boson gate set for hybrid continuous-discrete variable (CV-DV) quantum computing. This document outlines how to utilize these gates on QSCOUT using Just Another Quantum...
An Effective Quantum Hoare Logic for Hybrid Quantum Programs with Unbounded Loops
Christophe Chareton, Jad Issa, Romain Péchoux·Jul 9, 2026
While quantum hardware remains limited, hybrid quantum-classical algorithms with complex control structures, including unbounded loops, are emerging, posing new challenges for quantum program analysis, including the accurate estimation of the resourc...
The Langevin-equation description of optomechanics with the dispersive and dissipative optomechanical coupling
Alexander K. Tagantsev·Jul 9, 2026
The description of the optomechanical systems is commonly based on the quantum Langevin equation formalism. This framework is introduced phenomenologically or based on a model Hamiltonian. However, once dealing with the optomechanical Fabry-Perot cav...
Quantum Communication Lower Bounds for Search Problems via Matrix Discrepancy
Minbo Gao, Chenghua Liu, Guangxu Yang +1 more·Jul 9, 2026
We study one-way quantum communication lower bounds for search problems. Unlike decision problems, search problems can have many valid outputs, which pose a fundamental barrier to standard quantum lower-bound techniques. We overcome this by developin...
Metropolitan entanglement distribution between an atom and a near-visible photon
Maya Büki, Pooja Malik, Florian Fertig +9 more·Jul 9, 2026
Entanglement distribution is the overarching purpose of quantum networks. While communication over long distances can use deployed fiber infrastructure, it requires photons in the telecom band. However, advanced quantum network nodes do not operate a...
Magic Gate Teleportation: Structure, Useful Resource States, and Simpler Feedforward
Yunzhe Zheng, Allen Zang, Aleksander Kubica·Jul 9, 2026
Quantum gate teleportation is a key technique in fault-tolerant quantum computation that uses resource states to implement logical gates. Here, we develop a theory of quantum gate teleportation protocols that implement non-Clifford gates on arbitrary...
Non-Hermitian topology driven by an identity term: An exactly solvable paradigm
Lingfang Li, Yating Wei, Yang Ruan +6 more·Jul 9, 2026
An identity term in the Hamiltonian is conventionally regarded as spectrally inert-it shifts energies but does not alter eigenstate topology. We show that under non-Hermitian skin pumping, this paradigm fails: a momentum-dependent identity term activ...