Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum-advantage resource of a two-mode Gaussian state: Analytical theory of convex optimization and a Galois no-go for the closed-form solution
Kunwar Kalra, V. V. Kocharovsky·Jun 30, 2026
We study the problem of extracting a quantum complexity resource from a mixed Gaussian state of the multimode light. We present the first complete, certificate-checked solution to this problem in a genuinely coupled sector. We carry this out for the ...
Learning Low-Energy Subspace Overlaps in Many-Body Systems with Measurement-Based and Coherent Quantum Strategies
Shamminuj Aktar, Rishabh Bhardwaj, Tanmoy Bhattacharya +1 more·Jun 30, 2026
Predicting the overlap of quantum states with specified low-energy subspaces is a key diagnostic for quantum many-body dynamics, with direct applications in state preparation, subspace-based algorithms, and the study of thermalization. We study the s...
Production of Magic States via $Z$ Bosons and Dark Photons
Carlos Alvarado, Alfredo Aranda, César Bonilla +2 more·Jun 30, 2026
The production of magic states is studied in two settings. The first is the electroweak (EW) sector of the Standard Model (SM). The second is an extension featuring a new broken $U(1)$ gauge symmetry and a Dirac fermion charged under it. This setup r...
Classification and Exact Local Masking in Finite-Field Clifford Dual-Unitary Circuits
Basanta R Pahari·Jun 30, 2026
We classify two-qudit Clifford dual-unitary gates over the finite field $\mathbb{F}_q$, where the local dimension $q$ is a prime power, and apply the classification to exact local masking and operator transport in homogeneous brickwork circuits. Unde...
Wavefunctions localization, and the Wigner's Friend Paradox in a Framework of Discrete-Space Hypothesis
W. A. Zúñiga-Galindo·Jun 30, 2026
We present a resolution of the Wigner's Friend paradox within a framework of quantum mechanics (QM) on the hybrid space RxQ_{p}, where Q_{p} denotes the field of p-adic numbers, regarded as a model of discrete microscopic space at the Planck-Bronstei...
TCL4 Asymptotic Redundancy and Canonically Consistent Master Equations
Dragomir Davidovic·Jun 30, 2026
Left alone, open quantum systems relax toward a Kubo--Martin--Schwinger (KMS) equilibrium state, yet the inner workings of this process remain opaque. It remains unclear why the intricate fourth-order time-convolutionless (TCL4) population generator ...
A universal time-of-arrival signature of Bose--Einstein condensation
Mathieu Beau, Timothey Szczepanski·Jun 30, 2026
We show that Bose--Einstein condensation produces a cusp in the time-of-arrival (TOA) statistics of a harmonically trapped gas released into free fall. In the semiclassical long time-of-flight regime, with $ε=σ_V/\sqrt{2gH}\ll1$, both the mean and st...
Superconducting Spiral Inductors for RF Reflectometry: Operation at Elevated Temperatures and Magnetic Fields
Euan Parry, Murat Cubukcu, Patrick Reuvekamp +3 more·Jun 30, 2026
Superconducting spiral inductors are emerging as key components for radio-frequency (RF) reflectometry, a widely used readout technique for semiconductor spin qubits. Future scalable quantum-computing architectures are expected to operate at elevated...
Work Statistics Under Quantum-Jump and Quench Dynamics in Monitored Ising Chains
Manali Malakar, Alessandro Silva·Jun 30, 2026
We investigate work statistics in monitored transverse-field Ising chains subjected to both a quantum quench of the transverse field and either stochastic quantum jumps or controlled measurement sequences. For generalized measurements, we derive a tr...
Optically Active Single Hole Spin in ZnSe
Amirehsan Alizadehherfati, Yuxi Jiang, Kelsey J. Mirrielees +7 more·Jun 30, 2026
Semiconductor hole spins offer a pathway to extended coherence times by decoupling from nuclear magnetic noise, while their spin-orbit coupling enables fast all-electrical control. In ZnSe, however, realizing this potential has been limited by p-dopi...
A differential derivation of the Obara-Saika relation for Gaussian electron repulsion integrals
Charles C. Forgy, David A. Mazziotti·Jun 30, 2026
The Obara-Saika (OS) method is one of the most widely used techniques in quantum chemistry for evaluating electron repulsion integrals (ERIs) via a set of recurrence relations that build higher angular momentum integrals from lower-order ones. The or...
Velocity of a Quantum Particle in a Classically Forbidden Region
Christian Beck, Sheldon Goldstein, Dustin Lazarovici +2 more·Jun 30, 2026
Recently, Sharoglazova et al. [Nature 643, 67 (2025)] proposed a procedure for determining the speed of a quantum particle in the classically forbidden region of a potential step, and implemented it in a beautiful experiment. The inferred speeds disa...
Toward Hamiltonian simulations of Maxwell-Chern-Simons theory: constant modes and gauge field truncation
Andrea Bulgarelli, Maria Cristina Diamantini, Nico Dichter +6 more·Jun 30, 2026
Maxwell-Chern-Simons (MCS) theory in $2+1$ dimensions provides a paradigmatic example of a topological gauge theory with both dynamical and topological degrees of freedom. Its Euclidean formulation suffers from a sign problem, making Hamiltonian nume...
Simulation of Two-qubit Gate Variability and Fidelity of Spin Qubits Built on Nanosheet Technology
Trung Nguyen, Sarah Dweik, Hiu Yung Wong·Jun 30, 2026
Silicon spin qubits are promising for large-scale quantum-computer integration because they can fully leverage the well-developed semiconductor infrastructure. However, the low fidelity of two-qubit entanglement gates remains a key barrier to large-s...
Efficient entanglement of three remote single-atom quantum-network nodes
Matthias Seubert, Leonardo Ruscio, Tobias Frank +6 more·Jun 30, 2026
Entanglement distributed over a set of individually addressable qubit nodes is the enabling resource for a plethora of applications ranging from tests of quantum physics to secure and modular quantum information networks. Entanglement between two mem...
Spatially Coupled MacKay-Neal/Hsu-Anastasopoulos CSS Codes Achieve the Quantum-Erasure Hashing Bound by Seeded BP Decoding
Kenta Kasai·Jun 30, 2026
In classical sparse-graph coding, spatial coupling is a mechanism by which belief-propagation (BP) decoding attains the maximum-a-posteriori (MAP) or area-threshold performance of the uncoupled system. Since MacKay-Neal/Hsu-Anastasopoulos (MN/HA) pun...
Quantum Information as a New Lens for Precision Neutrino Physics
Khushboo Dixit, Ritam Kundu, Papia Panda +2 more·Jun 30, 2026
We present a quantum-information-theoretic study of three-flavor neutrino oscillations in long-baseline experiments by mapping flavor states to qubit-like representations and quantifying quantum correlations through total concurrence. The local minim...
Simulation of Axion-Induced Electromagnetic Signal Detection Using Plasmonic Metasurfaces and Diamond NV Centers
James L. Webb·Jun 30, 2026
The axion represents a strong candidate for weakly interacting dark matter. To date, high sensitivity lab based experiments and astrophysical observations have ruled out a substantial part of the axion mass and photon coupling parameter space. Howeve...
The contact temperature of arbitrary quantum states
Alain Joye, Marco Merkli·Jun 30, 2026
An intuitive scheme to assign a temperature to an arbitrary state of a quantum system is to investigate the heat flow resulting from the coupling to a thermometer. We introduce a simple model of a universal thermometer with the following property. Wh...
An efficient Pauli decomposition algorithm for structured matrices
Daniel J. Spencer, Kishor Bharti, Alexey V. Gorshkov·Jun 30, 2026
Decomposing classical matrices into linear combinations of Pauli strings is a major bottleneck for end-to-end implementations of near-term quantum algorithms. In this work, we consider a promise version of this Pauli decomposition problem in which th...