Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum Algorithms for the Minimum Steiner Tree problem with application to Binary Near-Perfect Phylogenies
Lingfa Meng, David Salvador Novo, Albert H. Werner +1 more·Oct 10, 2025
We present a quantum algorithm in bioinformatics for solving the Binary Near-Perfect Phylogeny Problem (BNPP) with a complexity bound of $O(8.926^q + 8^q nm2)$, where n is the number of input taxa and m is the sequence length for each taxon with each...
Quantum Action-Dependent Channels
Michael Korenberg, Uzi Pereg·Oct 10, 2025
We study communication over a quantum action-dependent channel, where the transmitter first performs an action that "shocks" the channel environment, and subsequently encodes a message into a transmission sent through the channel. This two-stage inte...
Quantum Circuit for Quantum Fourier Transform for Arbitrary Qubit Connectivity Graphs
Kamil Khadiev, Aliya Khadieva, Vadim Sagitov +1 more·Oct 10, 2025
In the paper, we consider quantum circuits for the Quantum Fourier Transform (QFT) algorithm. The QFT algorithm is a very popular technique used in many quantum algorithms. We present a generic method for constructing quantum circuits for this algori...
Efficient Emulation of Neutral Atom Quantum Hardware
Kemal Bidzhiev, Stefano Grava, Pablo le Henaff +3 more·Oct 10, 2025
Simulating the dynamics of neutral atom arrays is a challenging problem. To address this, we introduce two emulators, emu-sv and emu-mps, as computational backends for Pasqal's pulser package. Emu-sv is designed for high-precision state-vector simula...
Vacuum tunneling of vortices in two-dimensional $^4$He superfluid films
Michael J. Desrochers, Dominic Marchand, P. C. E. Stamp·Oct 10, 2025
At low temperature T we expect vacuum tunneling processes to occur in superfluid $^{4}$ He films. We distinguish between extrinsic processes, in which single vortices nucleate by tunneling off boundaries in the system, and intrinsic processes, in whi...
Bounds in the Projective Unitary Group with Respect to Global Phase Invariant Metric
Bhanu Pratap Yadav, Mahdi Bayanifar, Olav Tirkkonen·Oct 10, 2025
We consider a global phase-invariant metric in the projective unitary group PUn, relevant for universal quantum computing. We obtain the volume and measure of small metric ball in PUn and derive the Gilbert-Varshamov and Hamming bounds in PUn. In add...
Spin coherence scale: operator-ordering sensitivity beyond Heisenberg-Weyl
Aaron Z. Goldberg, Anaelle Hertz·Oct 10, 2025
We introduce the spin coherence scale as a measure of quantum coherence for spin systems, generalizing the quadrature coherence scale (QCS) previously defined for quadrature observables. This SU($2$)-invariant measure quantifies the off-diagonal cohe...
Vari-Cool: a non-unitary quantum variational protocol for simulated cooling
Jeffrey Z. Song, Gilad Kishony, Erez Berg +1 more·Oct 10, 2025
We introduce a variational approach for preparing low energy states of arbitrary target Hamiltonians. The protocol is defined in terms of a repeated cycle consisting of p layers of unitary gates applied to the system and ancilla "bath" qubits, follow...
Simplified Quantum Weight Reduction with Optimal Bounds
Min-Hsiu Hsieh, Xingjian Li, Ting-Chun Lin·Oct 10, 2025
Quantum weight reduction is the task of transforming a quantum code with large check weight into one with small check weight. Low-weight codes are essential for implementing quantum error correction on physical hardware, since high-weight measurement...
Three Birds with One Stone: Improving Performance, Convergence, and System Throughput with Nest
Yuqian Huo, David Quiroga, Anastasios Kyrillidis +1 more·Oct 10, 2025
Variational quantum algorithms (VQAs) have the potential to demonstrate quantum utility on near-term quantum computers. However, these algorithms often get executed on the highest-fidelity qubits and computers to achieve the best performance, causing...
Certifying Quantum Gates via Automata Advantage
Anna Schroeder, Lucas B. Vieira, Jan Nöller +2 more·Oct 10, 2025
There is growing interest in developing rigorous tests of quantumness that are feasible even before practical quantum advantages become a reality. Such tests not only aim to certify the quantum nature of a system but also serve as benchmarks for prec...
Unveiling dynamical quantum error correcting codes via non-invertible symmetries
Rajath Radhakrishnan, Adar Sharon, Nathanan Tantivasadakarn·Oct 10, 2025
Dynamical stabilizer codes (DSCs) have recently emerged as a powerful generalization of static stabilizer codes for quantum error correction, replacing a fixed stabilizer group with a sequence of non-commuting measurements. This dynamical structure u...
Disorder-Induced Anomalous Diffusion in a 3D Spin Network
Andrew Stasiuk, Garrett Heller, Lance Berkey +2 more·Oct 10, 2025
Emergent hydrodynamics (EHD) bridges short-time unitarity with late-time thermodynamics, universal transport phenomena characterize the manner and speed of transport and thermalization. Typical non-integrable systems with few conserved local quantiti...
Incoherent Imaging with Spatially Structured Quantum Probes
Anthony J. Brady, Zihao Gong, Alexey V. Gorshkov +1 more·Oct 10, 2025
Incoherent imaging, including fluorescence and absorption microscopy, is often limited by weak signals and resolution constraints -- notoriously, Rayleigh's curse. We investigate how spatially structured quantum probes, combined with quantum detectio...
Big cats: entanglement in 120 qubits and beyond
Ali Javadi-Abhari, Simon Martiel, Alireza Seif +2 more·Oct 10, 2025
Entanglement is the quintessential quantum phenomenon and a key enabler of quantum algorithms. The ability to faithfully entangle many distinct particles is often used as a benchmark for the quality of hardware and control in a quantum computer. Gree...
A microscopic approach to nonlinear theory of spin-charge separation
Oleksandr Tsyplyatyev, Yiqing Jin, María Moreno +2 more·Oct 10, 2025
The fate of spin-charge separation beyond the low energy remains elusive up to now. Here we develop a microscopic theory of the correlation functions using the strong coupling expansion of the Hubbard model and demonstrate its validity down to the ex...
Subspace Leakage Error Randomized Benchmarking of Mølmer-Sørensen Gates
R. T. Sutherland, A. C. Hughes, J. P. Marceaux +3 more·Oct 10, 2025
We demonstrate a new technique that adapts single-qubit randomized benchmarking to two-qubit Mølmer-Sørensen gates. We use the controllable gate phase to generate Cliffords that act on a two-state subspace, enabling benchmarking of two-qubit gates wi...
Entanglement and accidental symmetries in the nucleon-nucleon system
Alma L. Cavallin, Oliver Thim, Christian Forssén·Oct 10, 2025
We study the connection between accidental symmetries in the nuclear interaction and spin entanglement in two-nucleon scattering. Specifically, we incorporate different levels of Wigner $SU(4)$ and Serber symmetries into leading-order potentials deri...
Fast CZ Gate via Energy-Level Engineering in Superconducting Qubits with a Tunable Coupler
Benzheng Yuan, Chaojie Zhang, Chuanbing Han +8 more·Oct 10, 2025
In superconducting quantum circuits, decoherence errors in qubits constitute a critical factor limiting quantum gate performance. To mitigate decoherence-induced gate infidelity, rapid implementation of quantum gates is essential. Here we propose a s...
Nonlocal Games Through Communication Complexity and Quantum Cryptography
Pierre Botteron·Oct 10, 2025
This thesis explores foundational aspects of quantum information theory and quantum cryptography. First, we investigate quantum correlations in interactive settings, including the CHSH and graph isomorphism games. We aim to distinguish quantum correl...