Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Probing an electron spin ensemble with squeezed microwave signals
P. Oehrl, F. Fesquet, K. E. Honasoge +5 more·Dec 19, 2025
The efficient transfer of quantum states into a long-lived storage unit such as solid-state spin ensembles is widely recognized as a critical challenge with significant implications for quantum communication, sensing and computing applications. Here,...
Single-Photon Scattering in a Waveguide Coupled to a Lossy or Gain Giant Atom
Yu Xin, Jia-Ming Zhang, Bing Chen·Dec 19, 2025
This work investigates single-photon scattering in a one-dimensional coupled-resonator waveguide coupled to a giant atom with a complex on-site energy. Within the generalized projection operator formalism, we derive analytical expressions for the sca...
Rydberg Atomic RF Sensor-based Quantum Radar
Sourav Banerjee, Neel Kanth Kundu·Dec 19, 2025
Rydberg atom-based RF sensors offer distinct advantages over conventional dipole antennas for electric field detection. This paper presents a system model and performance analysis of a Rydberg atom-based quantum radar, which employs optical readout v...
The crossover from classical to quantum transport in a weakly-interacting Fermi gas
Hadrien Kurkjian·Dec 19, 2025
We present an exact solution of the quantum kinetic equation of a weakly interacting Fermi gas in the crossover from the degenerate Fermi-liquid regime to the classical Boltzmann gas. We construct families of orthogonal polynomials tailored to each a...
Validating the calibrated creation of heralded single photons
Daniel Borrero Landazabal, Kaisa Laiho·Dec 19, 2025
Coincidence-count discrimination have turned utterly practical in the characterization of photon-pair processes and heralded single photons. Here, we implement a heralded single photon source based on parametric down-conversion (PDC) in a PP-KTP wave...
Quantum quenches across continuous and first-order quantum transitions in one-dimensional quantum Ising models
Andrea Pelissetto, Davide Rossini, Ettore Vicari·Dec 19, 2025
We investigate the quantum dynamics generated by quantum quenches (QQs) of the Hamiltonian parameters in many-body systems, focusing on protocols that cross first-order and continuous quantum transitions, both in finite-size systems and in the thermo...
The Standard Model Symmetry and Qubit Entanglement
Jochen Szangolies·Dec 19, 2025
Research at the intersection of quantum gravity and quantum information theory has seen significant success in describing the emergence of spacetime and gravity from quantum states whose entanglement entropy approximately obeys an area law. In a diff...
Microcomb-driven large-scale fully connected quantum network
Fang-Xiang Wang, Sheng-Teng Zheng, Long Huang +15 more·Dec 19, 2025
Fully connected quantum networks enable simultaneously connecting every user to every other user and are the most versatile and robust networking architecture. However, the scalability of such networks remains great challenge for practical applicatio...
Spin minimum uncertainty states for refined uncertainty relations
Hao Dai, Yue Zhang·Dec 19, 2025
Minimum uncertainty states of the conventional Heisenberg uncertainty relation have been extensively studied and are often regarded as the most classical quantum states from the perspective of uncertainty, providing valuable insight into the nature o...
Towards Quantum Advantage in Sparsified Bosonic SYK Models
Vaibhav Gautam, Atsushi Matsuo, Masahito Yamazaki·Dec 19, 2025
We advocate the sparsification of bosonic SYK models as a promising arena for the exploration of quantum advantage. We initiate the study of quantum simulations of the models, both in classical simulators and on quantum devices implemented using supe...
An edge-based and subspace reduction encoding scheme to solve the traveling salesman problem in quantum computers
Anandu Kalleri Madhu, Chi-Kwong Li, Jami Rönkkö +2 more·Dec 19, 2025
This paper introduces a novel edge-based encoding technique for solving the Traveling Salesman Problem (TSP) on a quantum computer, reducing the required number of qubits. For implementation in real quantum devices, we applied the subspace reduction ...
Detecting Axion Dark Matter with an Organic Molecular Maser
Hongliang Wu, Yuchen Han, Zhengtao Wang +7 more·Dec 19, 2025
We present a novel quantum sensing approach to search for axion-electron interactions around the axion mass of 6 \mueV. In this region, laboratory searches are relatively scarce, and our direct experiment measuring the axion-electron coupling constan...
Emergent Universality Class in Dissipative Quantum Systems with Dipole Moment Conservation
Wenbo Zhou, Yuke Zhang, Pengfei Zhang·Dec 19, 2025
Understanding the non-equilibrium dynamics of quantum many-body systems remains one of the grand challenges of modern physics. In particular, increasing attention has been devoted to the emergence of non-equilibrium universality classes that have no ...
Bound states and decay dynamics in $N$-level Friedrichs model with factorizable interactions
Jia-Ming Zhang, Yu Xin, Bing Chen·Dec 19, 2025
Considering an $N$-level system interacting factorizably with a continuous spectrum, we derive analytical expressions for the bound states and the dynamical evolution within this single-excitation Friedrichs model by using the projection operator for...
A Lindblad-Pauli Framework for Coarse-Grained Chaotic Binary-State Dynamics
Yicong Qiu, Qiye Zheng·Dec 19, 2025
Coarse-graining a chaotic bistable oscillator into a binary symbol sequence is a standard reduction, but it often obscures the geometry of the reduced state space and structural constraints of physically meaningful stochastic evolution. We develop a ...
Quantum-enhanced Information Retrieval from Reflective Intelligent Surfaces
Shiqian Guo, Tingxiang Ji, Jianqing Liu·Dec 19, 2025
Information retrieval from passive backscatter systems is widely used in digital applications with tight energy budgets, short communication distances, and low data rates. Due to the fundamental limits of classical wireless receivers, the achievable ...
On-Demand Millisecond Storage of Spectro-Temporal Multimode Telecom Photons
Anuj Sethia, Nasser Gohari Kamel, Daniel Oblak·Dec 19, 2025
The realization of scalable quantum networks for distribution of entanglement over long distances hinges on quantum repeaters. To outperform the exponential transmission loss in optical fibers, quantum repeaters must employ multiplexing schemes in th...
Zero-added-loss entanglement multiplexing using time-bin spectral shearing
Joseph C. Chapman, Muneer Alshowkan, Jack Postlewaite +2 more·Dec 19, 2025
High-quality quantum communications that enable important capabilities, such as distributed quantum computing and sensing, will require quantum repeaters for providing high-quality entanglement. To realize high-rate heralded entanglement for quantum ...
fractional-time deformation of quantum coherence in open systems: a non-markovian framework beyond lindblad dynamics
Taylan Demir·Dec 19, 2025
In this paper, we propose a fractional time extension of the Quan tum Master Equation. We introduce a Caputo-type fractional derivative in time as an extension of the exponential decay of the Lindblad framework through the incorporation of fractional...
Evaluating Sample-Based Krylov Quantum Diagonalization for Heisenberg Models with Applications to Materials Science
Roman Firt, Neel Misciasci, Jonathan E. Mueller +4 more·Dec 19, 2025
We evaluate the Sample-based Krylov Quantum Diagonalization (SKQD) algorithm on one- and two-dimensional Heisenberg models, including strongly correlated regimes in which the ground state is dense. Using problem-informed initial states and magnetizat...