Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Unspeakable Coherence Concentration
Benjamin Stratton, Chung-Yun Hsieh, Paul Skrzypczyk·Dec 3, 2025
Unspeakable coherence is a key feature separating quantum and classical physics. Modelled as asymmetry with respect to a continuous transformation generated by a physically relevant observable, such as the Hamiltonian or angular moment, unspeakable c...
An elementary approach to Wehrl-type entropy bounds in quantitative form
Fabio Nicola, Federico Riccardi, Paolo Tilli·Dec 3, 2025
We consider the problem of the stability (with sharp exponent) of the Lieb--Solovej inequality for symmetric $SU(N)$ coherent states, which was obtained only recently by the authors. Here, we propose an elementary proof of this result, based on refor...
Maestro: Intelligent Execution for Quantum Circuit Simulation
Oriol Bertomeu, Hamzah Ghayas, Adrian Roman +1 more·Dec 3, 2025
Quantum circuit simulation remains essential for developing and validating quantum algorithms, especially as current quantum hardware is limited in scale and quality. However, the growing diversity of simulation methods and software tools creates a h...
Simulation of a Heterogeneous Quantum Network
Hayden Miller, Caitao Zhan, Michael Bishof +4 more·Dec 3, 2025
Quantum networks are expected to be heterogeneous systems, combining distinct qubit platforms, photon wavelengths, and device timescales to achieve scalable, multiuser connectivity. Building and iterating on such systems is costly and slow, which mot...
Phase Transitions without gap closing in monitored quantum mean-field systems
Luca Capizzi, Riccardo Travaglino·Dec 3, 2025
We investigate the monitored dynamics of many-body quantum systems in which projective measurements of extensive operators are alternated with unitary evolution. Focusing on mean-field models characterized by all-to-all interactions, we develop a gen...
Asymmetric excitation of left- vs right-handed photons in accelerating waveguides
Adrian del Rio·Dec 3, 2025
The electromagnetic duality symmetry of Maxwell's equations in vacuum implies that the circular polarization $Q$ of classical electromagnetic waves is conserved. In quantum field theory, the normal-ordered operator $\hat Q$ represents the difference ...
Entanglement membrane in the Brownian SYK chain
Márk Mezei, Harshit Rajgadia·Dec 3, 2025
There is mounting evidence that entanglement dynamics in chaotic many-body quantum systems in the limit of large subsystems and long times is described by an entanglement membrane effective theory. In this paper, we derive the membrane description in...
Deformed LDPC codes with spontaneously broken non-invertible duality symmetries
Pranay Gorantla, Tzu-Chen Huang·Dec 3, 2025
Low-density parity check (LDPC) codes are a well known class of Pauli stabiliser Hamiltonians that furnish fixed-point realisations of nontrivial gapped phases such as symmetry breaking and topologically ordered (including fracton) phases. In this wo...
A Quantum Gate Architecture via Teleportation and Entanglement
Samuel J. Sheldon, Pieter Kok, Callum W. Duncan·Dec 3, 2025
We present a universal quantum computing architecture which combines the measurement-driven aspect of MBQC with the circuit model's algorithm dependent generation of qubit entanglement. Our architecture, which we call QGATE, is tailored for discrete-...
Minimizing the Number of Code Switching Operations in Fault-Tolerant Quantum Circuits
Erik Weilandt, Tom Peham, Robert Wille·Dec 3, 2025
Fault-tolerant quantum computers rely on Quantum Error-Correcting Codes (QECCs) to protect information from noise. However, no single error-correcting code supports a fully transversal and therefore fault-tolerant implementation of all gates required...
A contextual advantage for conclusive exclusion: repurposing the Pusey-Barrett-Rudolph construction
Yìlè Yīng, David Schmid, Robert W. Spekkens·Dec 3, 2025
The task of conclusive exclusion for a set of quantum states is to find a measurement such that for each state in the set, there is an outcome that allows one to conclude with certainty that the state in question was not prepared. Defining classicali...
Exploiting Movable Logical Qubits for Lattice Surgery Compilation
Laura S. Herzog, Lucas Berent, Aleksander Kubica +1 more·Dec 3, 2025
Lattice surgery with two-dimensional quantum error correcting codes is among the leading schemes for fault-tolerant quantum computation, motivated by superconducting hardware architectures. In conventional lattice surgery compilation schemes, logical...
Dissipative Yao-Lee Spin-Orbital Model: Exact Solvability and $\mathcal{PT}$ Symmetry Breaking
Zihao Qi, Yuan Xue·Dec 3, 2025
Exactly solvable dissipative models provide an analytical tool for studying the relaxation dynamics in open quantum systems. In this work, we study an exactly solvable model based on an anisotropic variant of the Yao-Lee spin-orbital model, with diss...
Instantaneous Sobolev Regularization for Dissipative Bosonic Dynamics
Pablo Costa Rico, Paul Gondolf, Tim Möbus·Dec 3, 2025
We investigate quantum Markov semigroups on bosonic Fock space and identify a broad class of infinite-dimensional dissipative evolutions that exhibit instantaneous Sobolev-regularization. Motivated by stability problems in quantum computation, we sho...
Closing the problem of which causal structures of up to six total nodes have a classical-quantum gap
Shashaank Khanna, Matthew Pusey, Roger Colbeck·Dec 3, 2025
The discovery of Bell that there exist quantum correlations that cannot be reproduced classically is one of the most important in the foundations of quantum mechanics, as well as having practical implications. Bell's result was originally proven in a...
Thermalization from quenching in coupled oscillators
M. Harinarayanan, Karthik Rajeev·Dec 3, 2025
We introduce a finite-time protocol that thermalizes a quantum harmonic oscillator, initially in its ground state, without requiring a macroscopic bath. The method uses a second oscillator as an effective environment and implements sudden quenches of...
TARA Test-by-Adaptive-Ranks for Quantum Anomaly Detection with Conformal Prediction Guarantees
Davut Emre Tasar, Ceren Ocal Tasar·Dec 3, 2025
Quantum key distribution (QKD) security fundamentally relies on the ability to distinguish genuine quantum correlations from classical eavesdropper simulations, yet existing certification methods lack rigorous statistical guarantees under finite-samp...
Second-quantized numerical simulations of tunable entanglement in quantum high harmonic generation
Sebastián de-la-Peña, Heiko Appel, Angel Rubio +1 more·Dec 3, 2025
Quantum high-harmonic generation (HHG) is a prominent and growing field of research with potential capabilities of providing high photon-number entangled states of light. However, there is an open debate regarding the theory level required for correc...
Entanglement Detection with Rotationally Covariant Measurements -- From Compton Scattering to Lemonade
Marlene Funck, Ilija Funk, Tizian Schmidt +1 more·Dec 3, 2025
The accurate and efficient detection of quantum entanglement remains a central challenge in quantum information science. In this work, we study the detection of entanglement of polarized photons for measurement devices that are solely specified by ro...
Quantum Diplomacy within the Southeast Asia Quantum Ecosystem
Pak Shen Choong, Nurisya Mohd Shah, Yung Szen Yap·Dec 3, 2025
Amid the International Year of Quantum Science and Technology 2025 (IYQ 2025), a significant portion of global funding has been dedicated to various quantum initiatives, with over 30 countries announcing their respective quantum strategies. Within th...