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Live trends in quantum computing research, updated daily from arXiv.
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Quantum Noise-Aware RIS-Aided Wireless Networks Using Variational Encoding and Signal Stabilization
Shakil Ahmed·Nov 5, 2025
This paper introduces a noise-aware, quantum-assisted blockage prediction framework for RIS-enabled wireless networks, integrating a QBS, QRIS, and QUN. Visual and channel data are hybrid-encoded into quantum states and processed via variational quan...
Vortex-Controlled Quasiparticle Multiplication and Self-Growth Dynamics in Superconducting Resonators
Joong-Mok Park, M. Mootz, Richard H. J. Kim +11 more·Nov 5, 2025
Even in the quantum limit, non-equilibrium quasiparticle (QP) populations induce QP poisoning that irreversibly relaxes the quantum state and significantly degrades the coherence of transmon qubits. A particularly detrimental yet previously unexplore...
SWAP-Network Routing and Spectral Qubit Ordering for MPS Imaginary-Time Optimization
Erik M. Åsgrim, Stefano Markidis·Nov 4, 2025
We propose a quantum-inspired combinatorial solver that performs imaginary-time evolution (ITE) on a matrix product state (MPS), incorporating non-local couplings through structured SWAP networks and spectral qubit mapping of logical qubits. The SWAP...
Improving the Energy and Angular Resolutions of X-ray Telescopes with Nitrogen-Vacancy Centers in Diamond
Ephraim Gau, Zhongyuan Liu, Henric Krawczynski +1 more·Nov 4, 2025
We introduce a focal-plane detector for advancing the energy and angular resolutions of current X-ray telescopes. The architecture integrates a metallic magnetic microcalorimeter (MMC) array of paramagnetic absorber pads with a thin layer of nitrogen...
Dynamics generated by spatially growing derivations on quasi-local algebras
Stefan Teufel, Marius Wesle, Tom Wessel·Nov 4, 2025
We prove global existence and uniqueness of dynamics on the quasi-local algebra $\mathcal{A}$ of a quantum lattice system for spatially growing derivations $\mathcal{L}_Φ= \sum_x [ Φ_x , \cdot ]$. Existing results assume that the local terms $Φ_x\in\...
Motional entanglement in low-energy collisions near shape resonances
Yimeng Wang, Christiane P. Koch·Nov 4, 2025
Einstein, Podolsky, and Rosen discussed their paradox in terms of measuring the positions or momenta of two particles. These degrees of freedom can become entangled upon scattering, but how much entanglement can be created in this process? Here we ad...
Correlation Self-Testing of Quantum Theory against Generalised Probabilistic Theories with Restricted Relabelling Symmetry
Kuntal Sengupta, Mirjam Weilenmann, Roger Colbeck·Nov 4, 2025
Correlation self-testing of quantum theory involves identifying a task or set of tasks whose optimal performance can be achieved only by theories that can realise the same set of correlations as quantum theory in every causal structure. Following thi...
Analytically Continuing the Randomized Measurement Toolbox
Akash Vijay, Ayush Raj, Jonah Kudler-Flam +3 more·Nov 4, 2025
We develop a framework for extracting non-polynomial analytic functions of density matrices in randomized measurement experiments by a method of analytical continuation. A central advantage of this approach, dubbed stabilized analytic continuation (S...
Revisiting Nishimori multicriticality through the lens of information measures
Zhou-Quan Wan, Xu-Dong Dai, Guo-Yi Zhu·Nov 4, 2025
The quantum error correction threshold is closely related to the Nishimori physics of random statistical models. We extend quantum information measures such as coherent information beyond the Nishimori line and establish them as sharp indicators of p...
Classical shadows for sample-efficient measurements of gauge-invariant observables
Jacob Bringewatt, Henry Froland, Andreas Elben +1 more·Nov 4, 2025
Classical shadows provide a versatile framework for estimating many properties of quantum states from repeated, randomly chosen measurements without requiring full quantum state tomography. When prior information is available, such as knowledge of sy...
Zero-Noise Extrapolation via Cyclic Permutations of Quantum Circuit Layouts
Zahar Sayapin, Daniil Rabinovich, Nikita Korolev +1 more·Nov 4, 2025
Increasing the utility of currently available Noisy Intermediate-Scale Quantum (NISQ) devices requires developing efficient methods to mitigate hardware errors, taking into account the constraints of these devices such as medium number of qubits and ...
Clifford Hierarchy Stabilizer Codes: Transversal Non-Clifford Gates and Magic
Ryohei Kobayashi, Guanyu Zhu, Po-Shen Hsin·Nov 4, 2025
A fundamental problem in fault-tolerant quantum computation is the tradeoff between universality and dimensionality, exemplified by the the Bravyi-König bound for $n$-dimensional topological stabilizer codes. In this work, we extend topological Pauli...
Majorana string simulation of nonequilibrium dynamics in two-dimensional lattice fermion systems
Matteo D'Anna, Jannes Nys, Juan Carrasquilla·Nov 4, 2025
The study of real-time dynamics of fermions remains one of the last frontiers beyond the reach of classical simulations and is key to our understanding of quantum behavior in chemistry and materials, with implications for quantum technology. Here we ...
On the origin of exponential operator growth in Hilbert space
Vijay Ganesh Sadhasivam, Jan M. Rost, Stuart C. Althorpe·Nov 4, 2025
The question of thermalization in quantum many-body systems has long been studied through the properties of matrix elements of operators corresponding to local observables. More recently, the focus has shifted to the dynamics of operators, which lead...
Optical Vortex Transfer and Dispersion-Controlled Light Propagation in an Er YAG Three-Level Quantum System
Arefeh Vaezi, Ali Mortezapour, Seyed Hossein Asadpour·Nov 4, 2025
We theoretically investigate coherent orbital-angular-momentum (OAM) transfer and dispersion-controlled light propagation in a ladder-type Er YAG three-level system. Using the density-matrix formalism and coupled Maxwell-Bloch equations, we derive an...
Enhancing Federated Learning Privacy with QUBO
Andras Ferenczi, Sutapa Samanta, Dagen Wang +1 more·Nov 4, 2025
Federated learning (FL) is a widely used method for training machine learning (ML) models in a scalable way while preserving privacy (i.e., without centralizing raw data). Prior research shows that the risk of exposing sensitive data increases cumula...
Decoherence to quantum theory from a causally-indefinite post-quantum theory
James Hefford, Matt Wilson·Nov 4, 2025
We find a process satisfying the axioms of hyper-decoherence which produces standard quantum theory from the theory of quantum boxes (higher-order quantum theory with the non-signalling tensor product). This hyper-decoherence map evades the no-go the...
Efficient Variational Quantum Algorithms for the Generalized Assignment Problem
Carlo Mastroianni, Francesco Plastina, Jacopo Settino +1 more·Nov 4, 2025
Quantum algorithms offer a compelling new avenue for addressing difficult NP-complete optimization problems, such as the Generalized Assignment Problem (GAP). Given the operational constraints of contemporary Noisy Intermediate-Scale Quantum (NISQ) d...
Routing single photons with quantum emitters coupled to nanostructures
Mateusz Duda, Eve O. Mills, Nicholas J. Martin +2 more·Nov 4, 2025
Quantum emitters coupled to nanophotonic structures are an excellent platform for controllable single-photon scattering. The tunable light-matter interaction enables the construction of a single-photon switch -- a device that can route a single photo...
Resource-efficient variational quantum solver for the travelling salesman problem and its silicon photonics implementation
Alessio Baldazzi, Stefano Azzini, Lorenzo Pavesi·Nov 4, 2025
The travelling salesman problem is a well-known example of computationally-hard combinatorial problem for classical machines. Here, we propose a novel variational quantum algorithm to solve it. The method is based on the preparation of two maximally ...