Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Kardar-Parisi-Zhang dynamics in an open integrable system: beyond the spontaneous-symmetry-breaking ansatz
Guo-Qiang Wang, Chang-Ling Zou, Guang-Can Guo +1 more·Jul 2, 2026
The universality of dynamical scaling laws constitutes a cornerstone in the theoretical understanding of quantum many-body systems, particularly in non-equilibrium settings. Recent advancements have proposed a phenomenological ansatz based on spontan...
Temporal nonlocality of a qudit resides in the input state, not the channel, and certifies temporal teleportation up to a fundamental limit
Karol Bartkiewicz, Patrycja Tulewicz·Jul 2, 2026
Correlations between two moments in time can be too strong for any classical explanation -- and, remarkably, this can happen for a single quantum system measured twice, with no second particle involved. We show that when one qudit is sent through a n...
Time-Reversal and Reversible Dynamics in Cavity QED for Quantum Metrology
Simone Colombo, Edwin Pedrozo-Peñafiel·Jul 2, 2026
Quantum-enhanced metrology relies on entanglement to achieve sensitivities beyond the standard quantum limit. While remarkable progress has been made in generating highly entangled many-body states, extracting their metrological advantage remains a c...
One More Time: Revisiting Neural Quantum States from a Reinforcement Learning Perspective
Juan Agustín Duque, Sergio García Heredia, Vinicius Hernandes +4 more·Jul 2, 2026
Neural quantum states (NQS) provide a flexible and scalable framework for approximating quantum many-body wavefunctions. Among NQS parameterizations, autoregressive models are especially attractive because they enable exact, independent sampling from...
Neural-Network Inverse Design of SRF Cavities and Transmons for Bosonic Quantum Computation
Joseph Yaker, Jovan Markovic, Alessandro Reineri +2 more·Jul 2, 2026
Three-dimensional superconducting radio-frequency (SRF) cavities provide exceptionally long-lived electromagnetic modes and, when coupled to nonlinear elements such as transmon qubits, become promising architectures for bosonic quantum information pr...
Bockstein braiding statistics
Po-Shen Hsin, Yu-An Chen·Jul 2, 2026
Braiding phenomena, from the charge-flux Aharonov-Bohm effect to anyonic statistics in fractional quantum Hall systems, are paradigmatic manifestations of topology in quantum physics. Ordinary mutual braiding between $p$- and $q$-dimensional excitati...
A transition-metal qubit in diamond with all-optical control and millisecond quantum memory
I. M. Morris, T. Alberth, L. Crooks +6 more·Jul 2, 2026
Quantum networks require qubits that combine efficient optical access, coherent control, and long-lived quantum memory, but realizing all three in one scalable platform remains a central bottleneck. Diamond color centers are leading candidates, yet w...
Computable measures of fermionic non-Gaussianity from the covariance matrix
Poetri Sonya Tarabunga, Bernhard Jobst, Raúl Morral-Yepes +4 more·Jul 2, 2026
Fermionic non-Gaussianity, or fermionic magic, is a key resource underlying the computational complexity of fermionic quantum systems, yet tractable and operationally meaningful ways to quantify it remain limited. We address this challenge by develop...
Generalized Extended Codes with Applications in Entanglement-Assisted Qubit and Qutrit Codes
Yang Li, Martianus Frederic Ezerman, Shitao Li +2 more·Jul 2, 2026
We prove that any generalized extended code is monomially equivalent to the Hermitian dual of a code which is closely related to a second kind of extended code of $\C^{\perp_{\rm H}}$. Every $[n+1,k+1]_{q^2}$ linear code $\D$ with $d(\D^{\perp_{\rm H...
A Structure Theorem for Phase-Space Representations of Quantum Error-Correcting Codes
Enrico Bozzetto, Jonte R. Hance·Jul 2, 2026
We connect the structure theorem for quasiprobability representations to quantum error correction. For a code space invariant under a subgroup of an extended Weyl-Heisenberg group, the Brif-Mann construction gives a semi-functorial representation whe...
Thermodynamics of Quantum Reservoir Computing
Lixiang Ding, Xingze Qiu·Jul 2, 2026
Quantum reservoir computing provides a framework for processing complex temporal data, yet its fundamental computational and energetic limits remain unresolved. Here, we establish a non-equilibrium thermodynamic framework that links the macroscopic p...
Extending the computational reach of Quantum Annealing using Reverse Annealing
Lucas Joshua Menger, Thomas Lippert, Manpreet Singh Jattana·Jul 2, 2026
Quantum annealing is a promising heuristic for combinatorial optimization, but on current hardware its performance degrades for larger and more complex problems due to noise and small energy gaps. Reverse annealing has been proposed as a refinement s...
Quantum Convolutional Autoencoders for Reconstruction-Based Anomaly Detection
Donovan Slabbert, Francesco Petruccione·Jul 2, 2026
Quantum convolutional neural networks (QCNNs) have become increasingly popular in quantum machine learning (QML) due to their efficient parameterization and hierarchical representation of quantum information. Anomaly detection is an important machine...
Electrical transport in ultra-thin films: from Fuchs-Sondheimer to quantum-confinement
Alessio Zaccone·Jul 2, 2026
Ultra-thin films are fundamental components of modern nanoelectronics, where reducing thickness to the few-nanometer scale leads to a dramatic increase in electrical resistivity. For decades, this behavior has been interpreted in terms of classical s...
Krylov-Lie Algebras for Variational Quantum Algorithms: Geometric, Depth-Aware Insights into Expressivity and Trainability
Anžej Margeta-Cacace·Jul 2, 2026
Variational quantum algorithms (VQAs) are a leading approach to near-term quantum computation, but their utility is limited by barren plateaus and other pathologies in their loss landscapes. Existing landscape theories based on dynamical Lie algebras...
Open-boundary integrable quantum circuits with different geometries
Miguel García Fernández, Chiara Paletta, Ana L. Retore·Jul 2, 2026
We present a complete classification of integrable Yang-Baxter quantum circuits with open boundary conditions and arbitrary circuit geometries. Starting from the standard transfer-matrix construction with two types of staggered inhomogeneities, we de...
Anisotropic tunneling through magnetic barriers in 8-Pmmn borophene
Rachid El Aitouni, Sanae Zriouel, Clarence Cortes +2 more·Jul 2, 2026
We present a theoretical study of electron tunneling through a magnetic barrier in 8-Pmmn borophene, created by depositing two ferromagnetic strips on the borophene sheet. Using a low-energy effective Hamiltonian that captures the anisotropic Dirac s...
On the Symplectic Propagation of the Spin-MInt Algorithm for Non-Adiabatic Quantum Dynamics
James R. Rampton, Lauren E. Cook, Timothy J. H. Hele·Jul 2, 2026
Mapping methods are often used for the numerical simulation of nonadiabatic systems by propagating classical mapping variable trajectories. A recently popularised mapping method is spin-mapping, whose mapping variables arise from quantum mechanical o...
Undamped Modes in an N-Qubit Heisenberg Chain with Collective Dissipation
Chun Hei Leung·Jul 2, 2026
We investigate the undamped behaviors in a spin-1/2 Heisenberg chain coupled with an environment via collective spin jump operators. Using the Bethe ansatz basis, we show that undamped modes exist for any chain length N >= 3. These modes remain robus...
Idling error suppression through gate scheduling
Hoiki Madison Liu, Kazunori Maruyama, Hirotaka Oshima +1 more·Jul 2, 2026
Achieving high-precision quantum computation requires effective suppression of idling errors that occur when qubits remain inactive during waiting periods within a quantum circuit. Conventional mitigation techniques, such as dynamical decoupling, sup...