Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Semi-Device-Independent Certification for Nonlocality without Entanglement
Hanwool Lee, Joonwoo Bae·Jun 11, 2026
In this work, we investigate maximum-confidence discrimination, which encompasses minimum-error and unambiguous discrimination, for ensembles of separable states by considering global and separable measurements. We demonstrate that global measurement...
To Cool, or Not to Cool? Displacement Sensing with Hot Quantum States
Piotr T. Grochowski·Jun 11, 2026
Quantum-enhanced displacement sensing with bosonic systems is typically formulated assuming that the oscillator is cooled close to its ground state before nonclassical probe preparation. We investigate whether such near-ground-state initialization is...
Generalized two-qubit Hamiltonian for Projective Quantum Feature Maps
Rafael Simões do Carmo, Edson Amaro Junior, Felipe Fanchini·Jun 11, 2026
Projected quantum feature maps provide a strategy for using quantum processors as feature generators for classical machine-learning models. Building on counterdiabatic Ising-glass and one-dimensional Heisenberg PQFMs, we introduce a generalized two-q...
Optimal classical shadow estimation of unitary channels at Heisenberg limit
Entong He, Zihao Li, Noam Scully +2 more·Jun 11, 2026
Full tomography of an unknown quantum evolution is resource-intensive and often unnecessary when the goal is only to predict selected properties. This motivates the study of classical shadow estimation of unitary channels (CSEU), a task in which one ...
Diffusive Dynamics of Nonstabilizerness
Zhenyu Xiao, Shinsei Ryu·Jun 11, 2026
Symmetries shape the quantum-information dynamics of many-body systems, but their effect on nonstabilizerness, the resource complementary to entanglement, is less understood. We compute the stabilizer Rényi entropy, a measure of nonstabilizerness, in...
Approximability limits for bounded-degree max-LINSAT and implications for decoded quantum interferometry
Maximilian J. Kramer, Carsten Schubert, Jens Eisert·Jun 11, 2026
For general max-k-XORSAT with $k \geq 3$, no polynomial-time algorithm can do substantially better than random guessing on worst-case instances unless $\mathsf{P} = \mathsf{NP}$: approximating beyond the random-assignment value of $1/2$ is $\mathsf{N...
Approximate quantum error correction theory of non-isometric codes
Yixu Wang, Yijia Xu, Zi-Wen Liu·Jun 11, 2026
Non-isometric encoding arises in various important contexts in quantum error correction, most notably in the finite-energy, non-ideal codewords inevitable in experimental realizations of continuous-variable codes, and holographic quantum gravity. In ...
Quantized time in quantum walks under weak rank-K measurements
Klaus Ziegler·Jun 11, 2026
Measurements can be used to monitor the evolution of quantum systems and may lead to a universally quantized time statistics. It is known that the mean return time is quantized for strong and indirect monitoring through the winding number of the retu...
A ribbon ZX calculus for gauge theory
Gabriel Wong, Razin A. Shaikh, William Donnelly·Jun 11, 2026
ZX calculus provides a graphical formalism for reasoning about quantum processes, built from two interacting Frobenius algebras associated with the Z and X bases of a qubit. While it has found widespread application in quantum information and computi...
Generalized Exact Fractional Quantum Information Model with Memory Effects
Abdelmalek Bouzenada, Allan R. P. Moreira·Jun 11, 2026
In this paper, we analyze quantum information measures in fractional quantum mechanics using the Riemann-Liouville derivative formalism adopted here. In this case, we initially reconsider the conventional definitions of Shannon entropy and Fisher inf...
Quantum Logic Codes: Complete Transversal Logical Clifford Instruction Sets for High-Rate Stabilizer Quantum Error Correcting Codes
Adam Holmes·Jun 11, 2026
We study the structure and transversal logical capabilities of stabilizer quantum error correcting codes. Among our results, we identify universal lower bounds on circuit depth to generate a full logical Clifford algebra, and develop novel constructi...
A refined thermodynamic analysis of nonsecular master equations
Mohamed Boubakour, Talia Szikman, Cyril Elouard·Jun 11, 2026
We present a systematic thermodynamic analysis of nonsecular master equations. We consider master equations resulting either from the partial secular and the geometric-arithmetic approximations, two approximations ensuring the positivity of the syste...
Observation of Non-Gaussian Magnon Dynamics in a Two-Dimensional Long-Range XY Model
S. -A. Guo, J. -Y. Tan, J. Ye +11 more·Jun 11, 2026
Non-Gaussian evolution of high-order spin correlations characterizes important properties of quantum many-body systems. In practice, decoherence, statistical fluctuation and miscalibration of experimental parameters all hinder the witness of non-Gaus...
Invariant Measures and Weak-Magic-Injection Asymptotics in Random Monitored Quantum Circuits
Guocheng Zhen, Xuanrong Yang, Chengkai Zhu +2 more·Jun 11, 2026
Monitored quantum circuits provide a natural setting in which scrambling, measurements, and measurement-conditioned updates compete within a stochastic many-body dynamics. From the viewpoint of nonstabilizer resource theory, this competition is espec...
Reduced basis algorithm for solving nonlinear differential equations on quantum computers
Monica Lăcătuş, Matthias Möller, Sauro Succi·Jun 11, 2026
As quantum computing moves toward scientific computing applications, nonlinear differential equations remain a central challenge since quantum evolution is intrinsically linear. In this work, we introduce a reduced basis algorithm (RBA) for polynomia...
Optical Implementation of Equilibrium Propagation Using Spatial Photonic Ising Machines
Dimitri Vanden Abeele, Daniele Veraldi, Davide Pierangeli +2 more·Jun 11, 2026
Equilibrium Propagation offers a compelling alternative to traditional machine learning for training energy-based networks. Here we demonstrate a hybrid optical-digital implementation of EP using a Spatial Photonic Ising Machine (SPIM). The SPIM expl...
Quantum optical photoelectron interferometry
Jonathan Dubois, Viviane Cotte, Richard Taïeb +8 more·Jun 11, 2026
We present a general theoretical framework for multiphoton processes driven by quantum light fields, establishing a direct link between photon statistics and photoelectron observables. Our results show that the autocorrelation and cross-correlation f...
Foundations of Practical Quantum Advantage in Quantum-Informed Machine Learning for Predicting Chaos
Maida Wang, Xiao Xue, Minh Chung +1 more·Jun 11, 2026
We develop theoretical foundations for a practical quantum-advantage mechanism in quantum-informed machine learning for chaotic dynamical systems. A family of k-indexed higher-order quantum statistical priors (Q-Priors) hosts the k-point marginal of ...
Kerr-induced nonreciprocal transparency and group delay in a hybrid cavity magnomechanical system
M. Amghar, Noura Chabar, Mohamed Amazioug +3 more·Jun 11, 2026
We propose a scheme for realizing nonreciprocal transparency, Fano resonances, and slow/fast light in a hybrid cavity magnomechanical system containing two YIG spheres and a mechanical resonator. The nonreciprocal behavior originates from the magnon ...
Characterizing the functional role of quantum coherence in energy transfer
Hallmann Óskar Gestsson, Alexandra Olaya-Castro·Jun 11, 2026
Quantum coherence is understood to play a role in excitation energy transfer in open quantum systems, yet a quantitative approach to assessing its influence on the transfer process is still missing. Using Nakajima-Zwanzig projection operators, we der...