Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A minimalist self-differencing gating scheme for dead-time-free single-photon avalanche diodes at high repetition rate
Samuele Altilia, Edoardo Suerra, Stefano Capra +6 more·Sep 26, 2025
Gated quenched SPAD detectors are widely used in quantum communication and quantum computing setups employing high-repetition-rate lasers. Here, we present a novel scheme for high-repetition-rate (100 MHz) sine-wave gated SPADs, based on the self-dif...
Extending coherence time beyond break-even point using only drives and dissipation
Lida Sun, Yifang Xu, Yilong Zhou +11 more·Sep 26, 2025
Quantum error correction (QEC) aims to mitigate the loss of quantum information to the environment, which is a critical requirement for practical quantum computing. Existing QEC implementations heavily rely on measurement-based feedback, however, con...
Entanglement Hamiltonian for the massless Dirac field on a segment with an inhomogeneous background
Erik Tonni, Stefano Trezzi·Sep 26, 2025
We study the entanglement Hamiltonian of an interval for the massless Dirac field in an inhomogeneous background on a segment where the same boundary condition at both its endpoints is imposed, and in its ground state. We focus on a class of metrics ...
Supervised Machine Learning for Predicting Open Quantum System Dynamics and Detecting Non-Markovian Memory Effects
Ali Abu-Nada, Subhashish Banerjee·Sep 26, 2025
We present a \emph{novel} and scalable supervised machine learning framework to predict open-quantum system dynamics and detect non-Markovian memory using only local ancilla measurements. A system qubit is coherently coupled to an ancilla via a symme...
Mpemba Effects in Quantum Complexity
Sreemayee Aditya, Alessandro Summer, Piotr Sierant +1 more·Sep 26, 2025
The Mpemba effect is the phenomenon whereby systems farther from equilibrium may relax faster. In this work, we show that this counterintuitive behavior appears in the very measures that define quantum complexity. Using the framework of quantum resou...
Asymptotic equipartition property of subadditive multipartite entanglement measures on pure states
Dávid Bugár·Sep 26, 2025
We investigate the asymptotic equipartition property (AEP) in the context of multipartite entanglement measures on pure states. Specifically, we formulate AEP for subadditive entanglement measures that admit certain weak conditions. This is motivated...
Quantum Gates via Dynamical Decoupling of Central Qubit on IBMQ and 15NV Center in Diamond
Lucas Tsunaki, Michael Dotan, Kseniia Volkova +1 more·Sep 26, 2025
We demonstrate a hardware-agnostic protocol for realizing fast, high-fidelity gates through dynamical decoupling (DD) pulse sequences applied to a central qubit coupled to target qubits. The target qubits are controlled by leveraging their intrinsic ...
Introduction to modelling radical pair quantum spin dynamics with tensor networks
Kentaro Hino, Damyan S. Frantzov, Yuki Kurashige +1 more·Sep 26, 2025
Radical pairs (also known as spin qubit pairs, electron-hole pairs) are transient reaction intermediates that are found and utilised in all areas of science. Radical pair spin dynamics simulations including all nuclear spins have been a computational...
Privacy in Distributed Quantum Sensing with Gaussian Quantum Networks
Uesli Alushi, Roberto Di Candia·Sep 26, 2025
We study the privacy properties of distributed quantum sensing protocols in a Gaussian quantum network, where each node encodes a parameter via a local phase shift. For networks with more than two nodes, achieving perfect privacy is possible only asy...
A Source of Deterministic Entanglement for Matter-Wave Networks
Chen Li, RuGway Wu, Jörg Schmiedmayer·Sep 26, 2025
We describe a deterministic and experimentally feasible protocol for generating entangled pairs of ultracold neutral atoms through controlled dissociation of diatomic Feshbach molecules. The dissociation process naturally produces nonlocal quantum co...
On a discrete version of the position-momentum commutation relation
Nicolae Cotfas·Sep 26, 2025
The usual position-momentum commutation relation plays a fundamental role in the mathematical description of continuous-variable quantum systems. In the case of a qudit described by a Hilbert space of a high enough dimension, there exists a discrete ...
Noise cross-correlations from single-shot measurements
Juan S. Rojas-Arias, Peter Stano, Yi-Hsien Wu +3 more·Sep 26, 2025
We introduce a novel method that we call Single-Shot Cross-Spectroscopy (SSCS), for extracting the auto- and cross-power spectral densities of dephasing noise of a qubit pair. The method uses straightforward input, namely single-shot readouts from si...
Proposal of method to solve a Traveling Salesman Problem using Variational Quantum Kolmogorov-Arnold Network
Hikaru Wakaura·Sep 26, 2025
Traveling salesman problems (TSP) are one of the well-known combinatorial optimization problems that many groups tackle to solve. This problem appears in many types of combinational optimization, such as scheduling, route optimization, and circuit op...
Properties of computational entanglement measures
Ilia Ryzov, Faedi Loulidi, David Elkouss·Sep 26, 2025
Quantum entanglement is a useful resource for implementing communication tasks. However, for the resource to be useful in practice, it needs to be accessible by parties with bounded computational resources. Computational entanglement measures quantif...
Quantum simulation approach to ultra-weak magnetic anisotropy in a frustrated spin-1/2 antiferromagnet
Ki Won Jeong, Jae Yeon Seo, Sunghyun Lim +6 more·Sep 26, 2025
The intrinsic equivalence between electron spin and qubit offers a natural foundation for quantum simulations of magnetic materials. However, incorporating magnetocrystalline anisotropy (MCA), a key feature of real magnets, remains a major challenge....
The 2T-quoctit: a two-mode bosonic qudit for high energy physics
Doga Murat Kürkçüoglu, Henry Lamm, Oluwadara Ogunkoya +1 more·Sep 26, 2025
In this work, we study a two-mode bosonic encoding of a quoctit inside a non-Abelian group-structured constellation of coherent states. This work is motivated by the importance of nonabelian symmetry in particle physics and the desire to have transve...
Simultaneous Quantization and Reduction of Constrained Systems
Jianhao M. Yang·Sep 26, 2025
We present a novel framework for quantizing constrained quantum systems in which the processes of quantization and constraint enforcement are performed simultaneously. The approach is based on an extension of the stationary action principle, incorpor...
Average relative entropy of random states
Lu Wei·Sep 26, 2025
Relative entropy serves as a cornerstone concept in quantum information theory. In this work, we study relative entropy of random states from major generic state models of Hilbert-Schmidt and Bures-Hall ensembles. In particular, we derive exact yet e...
Towards reconstructing quantum structured light on a quantum computer
Mwezi Koni, Shawal Kassim, Paola C. Obando +2 more·Sep 26, 2025
We introduce a variational quantum computing approach for quantum state reconstruction within a discretized logical framework, using experimental measurement data as input. By mapping the reconstruction cost function onto an Ising model, the problem ...
Propagation Dynamics and Transient Amplification in Warm and Cold Atomic EIT Systems
Andrew MacRae, Connor Kupchak·Sep 26, 2025
We study the limitations on observing transient amplification in atomic systems exhibiting electromagnetically induced transparency (EIT) and evaluate the limits of optical Bloch equation (OBE) models. Using propagation-based Maxwell-Bloch simulation...