Papers
Live trends in quantum computing research, updated daily from arXiv.
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16,712 papers in 12 months (-57% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A Mean-Field Lindblad Master Equation Framework for Interaction-Driven Decoherence in Solid-State Qubit Ensembles
Dhiman Nandi, Sanghamitra Neogi·Jun 24, 2026
Multi-qubit systems are essential for scalable quantum technologies, but their performance is often limited by decoherence from qubit--qubit interactions and environmental noise. Although environmental decoherence in single-qubit systems and gate fid...
Closed Quantum Boltzmann Bridges: Coherent Revivals, Hidden Microstates, and the Emergence of Classical Two-Time Entropy Conditioning
Sina Kazemian, Ghazal Farhani, Younes Javanmard·Jun 24, 2026
The classical Boltzmann Bridge describes entropy histories conditioned on both an initial low-entropy macrostate and a later macrostate. Unlike the usual past-only formulation of the thermodynamic arrow, this two-time conditioning can produce entropy...
Modeling and Analysis of Phase Instability in Photonic Processor
Gökhan Elmas, Igor Litvin, Paul Kohl +1 more·Jun 23, 2026
Achieving both reconfigurability and stable output signals is a critical challenge in the development of integrated photonic circuits for large-scale optical quantum information processing. This has led to the creation of multimode photonic processor...
Hodge Spectral Surrogates for Topology-Constrained Optimization
Satoshi Kanno, Yoshi-aki Shimada·Jun 23, 2026
Topological information is widely used in data analysis, network design, and machine learning, and topological constraints naturally arise when optimizing or generating objects with prescribed homological structure. However, directly controlling Bett...
Halo-Independent Quantum Sensor Probes of Low-Velocity Dark Matter
Muping Chen, Graciela B. Gelmini, Volodymyr Takhistov +1 more·Jun 23, 2026
We present a halo-independent framework for sub-GeV dark matter (DM) direct detection using quantum sensors with sub-eV energy thresholds. Such detectors enable access to low DM velocities and may be sensitive to departures from the Standard Halo Mod...
Self-testing Quantum Supermaps
Victor Barizien, Cyril Branciard, Alastair A. Abbott +2 more·Jun 23, 2026
By certifying quantum operations from measurement statistics directly, without any assumption on the internal workings of the devices involved, self-testing enables a uniquely reliable identification of quantum objects. While such device-independent ...
Feasibility-driven QAOA with penalty scheduling
Francesco Ferrari, Matteo Vandelli, Daniele Dragoni·Jun 23, 2026
Most available quantum algorithms address constrained optimization problems by treating constraints as soft penalty terms within a QUBO formulation. This approach requires careful adjustment of the penalty coefficients, which scales poorly with the n...
Detection of patterns in a discrete-outcome sensor network
Pranjal Agarwal, Nada Ali, Mark Hillery·Jun 23, 2026
A discrete outcome quantum sensor network is one in which we are only interested in which detectors are activated. This can be studied in either the strong or weak interaction regime. If the detectors interact strongly with the environment, it is pos...
Note About Koopman-von Neumann Theory and Density Matrix
J. Kluson·Jun 23, 2026
In this short note we study Koopman-von Neumann theory for N-particle system. We argue that it is natural to identify classical N-particle distribution function as diagonal form of density matrix operator in coordinate representation. We also determi...
Quantum Primitive for Output-Hiding Function Sharing
Olivia R. Hartzell·Jun 23, 2026
A quantum information-theoretic primitive is introduced for determining a discrete-valued function that depends on multiple parties' local private inputs. The primitive permits the parties to mutually learn each others' local inputs, and thereby dete...
Nonlocal Quantum Phase Transitions
Alessandro Coppo, Aanal Jayesh Shah, Hadiseh Alaeian +3 more·Jun 23, 2026
Phase transitions are paradigmatic examples of emergent phenomena, in which symmetries present at the microscopic level can be spontaneously broken in the thermodynamic limit. Two primary physical mechanisms can drive this symmetry breaking: thermal ...
A Contactless Heat Engine Driven by Nonreciprocal Fluctuation-Induced Torques
Dhruv Shah, Kiryl Asheichyk, David Gelbwaser-Klimovsky +3 more·Jun 23, 2026
We describe a contactless heat engine in which quantum and thermal electromagnetic fluctuations act as the working medium. The setup consists of two concentric cylinders held at different temperatures. The inner cylinder stably levitates within the o...
Majorana-Pauli stabilizer codes and duality webs of fermionic topological phases
Meng Sun, Zongyuan Wang, Nathanan Tantivasadakarn +1 more·Jun 23, 2026
Stabilizer codes provide exact lattice realizations of bosonic topological orders. In contrast, systematic stabilizer descriptions of intrinsically fermionic topological phases remain much less developed. In this work, we introduce Majorana-Pauli sta...
Arbitrarily Loss-Tolerant Quantum Position Verification in a Single Execution
Llorenç Escolà-Farràs, Boris Škorić, Florian Speelman·Jun 23, 2026
Quantum position verification (QPV) seeks to certify the spatial location of an untrusted prover, but is challenged fundamentally by entanglement-based attacks and experimentally by photon loss. Both issues were addressed separately in different work...
Efficient Quantum Circuits for Coherent Conversion Between General First- and Second-Quantized Many-Body Representations
Jack S. Baker, Gaurav Saxena, Thi Ha Kyaw·Jun 23, 2026
Quantum simulation at fixed particle number admits two equivalent descriptions, a first-quantized (particle) representation and a second-quantized (occupation-number) representation. Their quantum resource costs differ sharply across computational ta...
Fast and Parallel High-Rate STAR Architecture for Megaquop Quantum Simulation
Refaat Ismail, Milan Kornjača, Hong-Ye Hu +4 more·Jun 23, 2026
Fault-tolerant quantum simulation is approaching a phase where encoding overhead, logical Clifford operations, magic-state preparation, and rotation synthesis must be optimized together for efficient implementation. Space-Time efficient Analog Rotati...
Rapid Cavity-Based Mid-Circuit Measurement and Feedforward in a Neutral Atom Array
Tsai-Chen Lee, Jacquelyn Ho, Yue-Hui Lu +4 more·Jun 23, 2026
Measuring part of a quantum system in the midst of its evolution and acting on the result in real time is essential for numerous quantum information protocols. Neutral-atom arrays are a leading platform for quantum information processing, but their m...
Universality beyond the Kibble-Zurek mechanism in the condensation of coherently coupled Bose gases
Subhadeep Patra, Paolo Comaron, Arko Roy·Jun 23, 2026
We study the universal spatial statistics of point-like topological defects formed during the nonequilibrium condensation of a coherently coupled Bose gas using the stochastic projected Gross-Pitaevskii equation. The symmetry-breaking transition is d...
Large-Language-Model Discovery of Quantum LDPC Codes through Structured Concept Evolution
Zidu Liu, Florian Marquardt·Jun 23, 2026
Quantum computers could outperform classical machines on important problems, but only if the errors that pervade quantum hardware can be corrected at scale. Quantum low-density parity-check (qLDPC) codes offer a promising route to this goal by combin...
Introduction to matrix-product states and tensor networks
Grégoire Misguich·Jun 23, 2026
These notes provide an introduction to tensor-network methods in quantum many-body physics, with an emphasis on matrix-product states (MPS). They develop the basic tensor-network language, including graphical notation, virtual indices, bond dimension...