Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,396 papers in 12 months (-22% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Quantum Purification for Amplitude Damping Noise
Kai Wang, Z. Peng·Sep 6, 2025
Noise poses a fundamental challenge to quantum information processing, with amplitude-damping (AD) noise being particularly detrimental. Preserving high-fidelity quantum systems therefore relies critically on effective error correction and purificati...
Another generalization of Hadamard test: Optimal sample complexities for learning functions on the unitary group
Daiki Suruga·Sep 6, 2025
Estimating properties of unknown unitary operations is a fundamental task in quantum information science. While full unitary tomography requires a number of samples to the unknown unitary scaling linearly with the dimension (implying exponentially wi...
Cartan-Khaneja-Glaser decomposition of $\SU(2^n)$ via involutive automorphisms
John A. Mora Rodríguez, Arthur C. R. Dutra, Henrique N. Sá Earp +1 more·Sep 5, 2025
We present a novel algorithm for performing the Cartan-Khaneja-Glaser decomposition of unitary matrices in $\SU(2^n)$, a critical task for efficient quantum circuit design. Building upon the approach introduced by Sá Earp and Pachos (2005), we overco...
Mitigating Measurement Crosstalk via Pulse Shaping
Yang Gao, Feiyu Li, Yang Liu +10 more·Sep 5, 2025
Quantum error correction protocols require rapid and repeated qubit measurements. While multiplexed readout in superconducting quantum systems improves efficiency, fast probe pulses introduce spectral broadening, leading to signal leakage into neighb...
Excitable quantum systems: the bosonic avalanche laser
Louis Garbe, Peter Rabl·Sep 5, 2025
We investigate the dynamics of a lasing system driven by a current of bosonic (quasi-)particles via a dissipative three-mode mixing process. A semi-classical analysis of this system predicts distinct dynamical regimes, where both the cavity mode and ...
Efficient optical configurations for trapped-ion entangling gates
Aditya Milind Kolhatkar, Karan K. Mehta·Sep 5, 2025
High-fidelity and parallel realization in scalable platforms of the two-qubit entangling gates fundamental to universal quantum computing constitutes one of the largest challenges in implementing fault-tolerant quantum computation. Integrated optical...
Spin-spin entanglement in diffractive heavy quark production
Michael Fucilla, Yoshitaka Hatta·Sep 5, 2025
We calculate the spin density matrix of a heavy quark-antiquark pair ($b\bar{b}$, $c\bar{c}$ or $s\bar{s}$) diffractively produced in Deep Inelastic Scattering and Ultraperipheral Collisions. We show that the Pomeron exchange leaves characteristic im...
Fold-transversal surface code cultivation
Kaavya Sahay, Pei-Kai Tsai, Kathleen Chang +4 more·Sep 5, 2025
Magic state cultivation is a state-of-the-art protocol to prepare ultra-high fidelity non-Clifford resource states for universal quantum computation. It offers a significant reduction in spacetime overhead compared to traditional magic state distilla...
Hybrid-Integrated InGaAs/InP SPAD Arrays for Quantum Communications
Joseph A. Dolphin, Rosemary O. E. Scowen, Louise M. Wells +7 more·Sep 5, 2025
Photonic integration is a promising route to miniaturise the hardware of quantum key distribution (QKD), yet the monolithic integration of single photon detectors remains a significant challenge. QKD receiver chips integrating superconducting detecto...
Embezzlement as a "Self-Test" for Infinite Copies of Entangled States
Li Liu·Sep 5, 2025
We investigate the operator-algebraic structure underlying entanglement embezzlement, a phenomenon where a fixed entangled state (the catalyst) can be used to generate arbitrary target entangled states without being consumed. We show that the ability...
A Modular, Adaptive, and Scalable Quantum Factoring Algorithm
Alok Shukla, Prakash Vedula·Sep 5, 2025
Shor's algorithm for integer factorization offers an exponential speedup over classical methods but remains impractical on Noisy Intermediate Scale Quantum (NISQ) hardware due to the need for many coherent qubits and very deep circuits. Building on o...
Geometric Discord of any arbitrary dimensional bipartite system and its application in quantum key distribution
Rashi Jain, Satyabrata Adhikari·Sep 5, 2025
Entangled quantum states are regarded as a key resource in quantum key distribution (QKD) protocols. However, quantum correlations, other than entanglement can also play a significant role in the QKD protocols. In this work, we will focus on one such...
Fast entangling gates on fluxoniums via parametric modulation of plasmon interaction
Peng Zhao, Peng Xu, Zheng-Yuan Xue·Sep 5, 2025
In superconducting quantum processors, exploring diverse control methods could offer essential versatility and redundancy to mitigate challenges such as frequency crowding, spurious couplings, control crosstalk, and fabrication variability, thus lead...
Improving initial-state-dependent quantum circuit optimization by introducing state labels
Toshiaki Kaji, Koji Terashi, Ryu Sawada·Sep 5, 2025
While the capabilities of quantum hardware have significantly advanced in recent years, executing quantum algorithms as quantum circuits at the lowest possible cost remains crucial, regardless of the hardware progress. We are developing a quantum-sta...
Adiabatic preparation of thermal states and entropy-noise relation on noisy quantum computers
Etienne Granet, Henrik Dreyer·Sep 5, 2025
We consider the problem of preparing thermal equilibrium states at finite temperature on quantum computers. Assuming thermalization, we show that states that are locally at thermal equilibrium can be prepared by evolving adiabatically an initial ther...
High-fidelity two-qubit gates with transmon qubits using bipolar flux pulses and tunable couplers
N. Smirnov, A. Matanin, A. Ivanov +15 more·Sep 5, 2025
High-fidelity two-qubit gates are essential for scalable quantum computing. We present a scheme based on superconducting transmon qubits and a control pulse delivery protocol that enables arbitrary controlled-phase gates modulated solely by an indepe...
Exploring an implementation of quantum learning pipeline for support vector machines
Mario Bifulco, Luca Roversi·Sep 5, 2025
This work presents a fully quantum approach to support vector machine (SVM) learning by integrating gate-based quantum kernel methods with quantum annealing-based optimization. We explore the construction of quantum kernels using various feature maps...
On the convergence of the variational quantum eigensolver and quantum optimal control
Marco Wiedmann, D. Burgarth, G. Dirr +3 more·Sep 5, 2025
When does a variational quantum algorithm converge to a globally optimal solution? Despite the large literature around variational approaches to quantum computing, the answer is largely unknown. We address this open question by developing a convergen...
Efficient Preparation of Resource States for Hamiltonian Simulation and Universal Quantum Computation
Thierry N. Kaldenbach, Isaac D. Smith, Hendrik Poulsen Nautrup +2 more·Sep 5, 2025
The direct compilation of algorithm-specific graph states in measurement-based quantum computation (MBQC) can lead to resource reductions in terms of circuit depth, entangling gates, and even the number of physical qubits. In this work, we extend pre...
Scalable parallel simulation of quantum circuits on CPU and GPU systems
Guolong Zhong, Yi Fan, Zhenyu Li·Sep 5, 2025
Quantum computing enables parallelism through superposition and entanglement and offers advantages over classical computing architectures. However, due to the limitations of current quantum hardware in the noisy intermediate-scale quantum (NISQ) era,...