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Live trends in quantum computing research, updated daily from arXiv.
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On entropy production of repeated quantum measurements III. Quantum detailed balance
Tristan Benoist, Noé Cuneo, Vojkan Jakšić +1 more·Nov 2, 2025
In light of the dynamical-systems approach to entropy production in repeated quantum measurements, proposed and illustrated in Commun. Math. Phys. 357, 77-123 (2018) [arXiv:1607.00162] and J. Stat. Phys. 182, 44 (2021) [arXiv:2012.03885], we characte...
Symmetry-resolved genuine multi-entropy: Haar random and graph states
Norihiro Iizuka, Simon Lin·Nov 2, 2025
We study the symmetry-resolved genuine multi-entropy, a measure that captures genuine multi-partite entanglement, in Haar random states and random graph states in the presence of a conserved quantity. For Haar random states, we derive explicit formul...
Hybrid Quantum Transformer for Language Generation
Desheng Kong, Xiangshuo Cui, Jiaying Jin +2 more·Nov 2, 2025
Although quantum computing has been increasingly applied to replace classical computation, most existing quantum or hybrid models remain confined to simple tasks, with no successful application to large-scale natural language generation to date. In t...
Hyperentanglement in Nanophotonic Systems with Discrete Rotational Symmetry
Lior Fridman, Amit Kam, Amir Sivan +3 more·Nov 2, 2025
We propose a scheme to generate hyperentanglement between photons carrying angular momentum in nanophotonic systems with discrete rotational symmetry. Coupling free-space photons into surface plasmon polaritons by a polygonal-shaped grating restricts...
Optimizing magnetic coupling in lumped element superconducting resonators for molecular spin qubits
Marcos Rubín-Osanz, David Rodriguez, Ignacio Gimeno +18 more·Nov 2, 2025
We engineer lumped-element superconducting resonators that maximize magnetic coupling to molecular spin qubits, achieving record single-spin couplings up to $100$ kHz and collective couplings exceeding $10$ MHz. The resonators interact with PTMr orga...
No, classical gravity does not entangle quantized matter fields
Lajos Diósi·Nov 2, 2025
In their recent work, Nature, {\bf 646}, 813 (2025), Aziz and Howl claim that classical (unquantized) gravity can generate entanglement of quantized matter if matter is treated within quantum field theory which is, no doubt, our ultimate theory to us...
Kostant relation in filtered randomized benchmarking for passive bosonic devices
David Amaro-Alcalá·Nov 2, 2025
We reduce the cost of the current bosonic randomized benchmarking proposal. First, we introduce a filter function using immanants. With this filter, we avoid the need to compute Clebsch-Gordan coefficients. Our filter uses the same data as the origin...
Exchange operation of Majorana zero modes in topological insulator-based Josephson trijunctions
Yunxiao Zhang, Zhaozheng Lyu, Xiang Wang +19 more·Nov 2, 2025
Majorana zero modes are anyons obeying non-Abelian exchange statistics distinct from fermions or bosons. While significant progresses have been achieved in the past two decades in searching for these exotic excitations in solid-state systems, their n...
Correspondence Between Ising Machines and Neural Networks
Andrew G. Moore·Nov 2, 2025
Computation with the Ising model is central to future computing technologies like quantum annealing, adiabatic quantum computing, and thermodynamic classical computing. Traditionally, computed values have been equated with ground states. This paper g...
Principle of Minimal Heating for Collapse and Hybrid Gravitational Models
Nicolò Piccione·Nov 1, 2025
Energy nonconservation is a prominent, testable prediction of collapse and hybrid classical-quantum gravitational models. Without smearing of certain operators, the associated heating (or energy increase) rate diverges, yet the smearing distribution ...
Superpositional Gradient Descent: Harnessing Quantum Principles for Model Training
Ahmet Erdem Pamuk, Emir Kaan Özdemir, Şuayp Talha Kocabay·Nov 1, 2025
Large language models (LLMs) are increasingly trained with classical optimization techniques like AdamW to improve convergence and generalization. However, the mechanisms by which quantum-inspired methods enhance classical training remain underexplor...
Towards Quantum Algorithms for the Optimization of Spanning Trees: The Power Distribution Grids Use Case
Carsten Hartmann, Nil Rodellas-Gràcia, Christian Wallisch +5 more·Nov 1, 2025
Optimizing the topology of networks is an important challenge across engineering disciplines. In energy systems, network reconfiguration can substantially reduce losses and costs and thus support the energy transition. Unfortunately, many related opt...
Quantum dynamics in lattices in presence of bulk dephasing and a localized source
Tamoghna Ray, Katha Ganguly, Dario Poletti +2 more·Nov 1, 2025
The aim of this work is to study the dynamics of quantum systems subjected to a localized fermionic source in the presence of bulk dephasing. We consider two classes of one-dimensional lattice systems: (i) a non-interacting lattice with nearest-neigh...
Quantum-coherent optical isolation and circulation using frequency conversion on a chip
Jierui Hu, Hao Yuan, Joshua Akin +2 more·Nov 1, 2025
Breaking optical reciprocity enables new regimes of light--matter interaction with broad implications for fundamental physics and emerging quantum technologies. Although various approaches have been explored to achieve optical nonreciprocity, realizi...
Quantum Field Theory and the Measurement Problem in Quantum Mechanics
Avi Levy, Meir Hemmo·Nov 1, 2025
We propose a novel solution to the measurement problem based on quantum field theory and Haag's theorem. According to our proposal in elementary interactions where the particles content is changed, the temporal evolution is non unitary. These interac...
Hierarchical Quantum Optimization for Large-Scale Vehicle Routing: A Multi-Angle QAOA Approach with Clustered Decomposition
Shreetam Dash, Shreya Banerjee, Prasanta K. Panigrahi·Nov 1, 2025
We present a quantum optimization methodology for solving large-scale Vehicle Routing Problem (VRP) using a combination of standard and Multi-Angle Quantum Approximate Optimization Algorithms (MA-QAOA). The approach decomposes 13-locations based VRP ...
Short-time dynamics in phase-ordering kinetics
Leila Moueddene, Malte Henkel·Nov 1, 2025
Short-time dynamics in the $2D$ Blume-Capel model, with a non-conserved order-parameter and short-ranged interactions, is analysed. For non-equilibrium dynamics, both at a critical point in the $2D$ Ising universality class and at the tricritical poi...
Lost and found charge in quantum batteries
Debanjan Dey Sarkar, Mallika Mondal, Preeti Parashar +1 more·Nov 1, 2025
Quantum batteries are prone to loosing their stored charge, when interacting with a thermal environment. However, getting a limited assistance from the thermal environment, is it possible to recover the charge back, in a reusable form? Here we answer...
Free-space multi-user quantum network with high key rate
Ayan Kumar Nai, G. K. Samanta·Nov 1, 2025
Emergent quantum networks are the essential ingredient for securely connecting multiple users worldwide, extensively deployed in both fibre and free-space. An essential element is the multiplexing of entanglement to multiple users, overcoming the pee...
Quantum Qomrades: Catalysts in Resource Theories and Memories in Dynamic Programming
Jeongrak Son·Nov 1, 2025
Quantum information theory explores the limits of manipulating quantum states. While auxiliary systems often enhance information processing, a systematic explanation for their power has been lacking. This thesis addresses this gap by investigating th...