Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Neural Guided Sampling for Quantum Circuit Optimization
Bodo Rosenhahn, Tobias J. Osborne, Christoph Hirche·Oct 14, 2025
Translating a general quantum circuit on a specific hardware topology with a reduced set of available gates, also known as transpilation, comes with a substantial increase in the length of the equivalent circuit. Due to decoherence, the quality of th...
Verifiable Quantum Advantage via Optimized DQI Circuits
Tanuj Khattar, Noah Shutty, Craig Gidney +5 more·Oct 13, 2025
Decoded Quantum Interferometry (DQI) provides a framework for superpolynomial quantum speedups by reducing certain optimization problems to reversible decoding tasks. We apply DQI to the Optimal Polynomial Intersection (OPI) problem, whose dual code ...
Rigorous estimation of error thresholds of transversal Clifford logical circuits
Yichen Xu, Yiqing Zhou, James P. Sethna +1 more·Oct 12, 2025
The threshold theorem promises a path to fault-tolerant quantum computation, provided the physical error rate is below a critical threshold. While transversal gates efficiently implement logical operations, they propagate errors and can lower this th...
Oscillator-qubit generalized quantum signal processing for vibronic models: a case study of uracil cation
Jungsoo Hong, Seong Ho Kim, Seung Kyu Min +1 more·Oct 12, 2025
Hybrid oscillator-qubit processors have recently demonstrated high-fidelity control of both continuous- and discrete-variable information processing. However, most of the quantum algorithms remain limited to homogeneous quantum architectures. Here, w...
Quantum NLP models on Natural Language Inference
Lin Sun, Peter Sullivan, Michael Martin +1 more·Oct 12, 2025
Quantum natural language processing (QNLP) offers a novel approach to semantic modeling by embedding compositional structure directly into quantum circuits. This paper investigates the application of QNLP models to the task of Natural Language Infere...
Depth One Quantum Alternating Operator Ansatz as an Approximate Gibbs Distribution Sampler
Elijah Pelofske·Oct 11, 2025
This study numerically investigates the thermal sampling properties of QAOA, the Quantum Alternating Operator Ansatz which was generalized from the original Quantum Approximate Optimization Algorithm. Specifically, the ability of QAOA to sample from ...
Bounds on Eventually Universal Quantum Gate Sets
Chaitanya Karamchedu, Matthew Fox, Daniel Gottesman·Oct 11, 2025
Say a collection of $n$-qu$d$it gates $Γ$ is eventually universal if and only if there exists $N_0 \geq n$ such that for all $N \geq N_0$, one can approximate any $N$-qu$d$it unitary to arbitrary precision by a circuit over $Γ$. In this work, we impr...
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...
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...
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...
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...
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...
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...
Nonlinear Heisenberg Limit via Uncertainty Principle in Quantum Metrology
Binke Xia, Jingzheng Huang, Yuxiang Yang +1 more·Oct 10, 2025
The Heisenberg limit is acknowledged as the ultimate precision limit in quantum metrology, traditionally implying that root mean square errors of parameter estimation decrease linearly with the time T of evolution and the number N of quantum gates or...
Gate Teleportation vs Circuit Cutting in Distributed Quantum Computing
Shobhit Gupta, Nikolay Sheshko, Daniel J. Dilley +3 more·Oct 10, 2025
Distributing circuits across quantum processor modules will enable the execution of circuits larger than the qubit count limitations of monolithic processors. While distributed quantum computation has primarily utilized circuit cutting, it incurs an ...
Acousto-optic lens for 3D shuttling of atoms in a neutral atom quantum computer
Zhichao Guo, Rik A.H. van Herk, Edgar J D Vredenbregt +1 more·Oct 10, 2025
We present a novel acousto-optic lens (AOL) design for neutral atom quantum computing. This approach enhances atom rearrangement in optical tweezer arrays and addresses the speed limitations imposed by the cylindrical lensing effect of acousto-optic ...
Optimizing VQE Ansatz for Studying Tight-Binding Models with \textit{sd}-Interaction and On-Site Coulomb Repulsion
Oleg Udalov·Oct 9, 2025
The VQE algorithm is applied to the problem of finding the ground state of a lattice model with on-site Coulomb repulsion, nearest-neighbor hopping, and on-site sd-interaction. We compare the performance of several ansatze, including cluster and gene...
Statistical Benchmarking of Optimization Methods for Variational Quantum Eigensolver under Quantum Noise
Silvie Illésová, Tomáš Bezděk, Vojtěch Novák +2 more·Oct 9, 2025
This work investigates the performance of numerical optimization algorithms applied to the State-Averaged Orbital-Optimized Variational Quantum Eigensolver for the H2 molecule under various quantum noise conditions. The goal is to assess the stabilit...
Single-Shot Universality in Quantum LDPC Codes via Code-Switching
Shi Jie Samuel Tan, Yifan Hong, Ting-Chun Lin +2 more·Oct 9, 2025
Code-switching is a powerful technique in quantum error correction that allows one to leverage the complementary strengths of different codes to achieve fault-tolerant universal quantum computation. However, existing code-switching protocols that enc...
Equivalence of continuous- and discrete-variable gate-based quantum computers with finite energy
Alex Maltesson, Ludvig Rodung, Niklas Budinger +2 more·Oct 9, 2025
We examine the ability of gate-based continuous-variable quantum computers to outperform qubit or discrete-variable quantum computers. Gate-based continuous-variable operations refer to operations constructed using a polynomial sequence of elementary...