Papers
Nonequilibrium phases and quantum correlations in synthetic transport models
Uddhav Sen, Federico Carollo, Sascha Wald·Mar 25, 2026
Quantum devices featuring mid-circuit measurement and reset capabilities, such as quantum computers and dual-species Rydberg quantum simulators, enable the realization of quantum cellular automata. These systems evolve in discrete time following loca...
Benchmarking Techniques for Decoded Quantum Interferometry
Leon Bollmann, Maximilian Hess·Mar 25, 2026
We develop a new benchmarking scheme for the Decoded Quantum Interferometry (DQI) algorithm quantifying the number of quantum gates required to obtain an optimal solution to a problem amenable to DQI. We apply the benchmarking scheme to the Binary Pa...
Superconducting properties of lifted-off Niobium nanowires
A. Kotsovolou, F. Soofivand, P. Singha +7 more·Mar 25, 2026
Hybrid superconductor/semiconductor devices play a crucial role in advancing quantum science and technology by merging the properties of superconductors and semiconductors. To operate these devices at high temperature, Niobium could substitute the wi...
Robust Parametric Quantum Gate Against Stochastic Time-Varying Noise
Yang He, Zigui Zhang, Zibo Miao·Mar 25, 2026
The performance of quantum processors in the noisy intermediate-scale quantum (NISQ) era is severely constrained by environmental noise and other uncertainties. While the recently proposed quantum control robustness landscape (QCRL) offers a powerful...
SpinGQE: A Generative Quantum Eigensolver for Spin Hamiltonians
Alexander Holden, Moinul Hossain Rahat, Nii Osae Osae Dade·Mar 25, 2026
The ground state search problem is central to quantum computing, with applications spanning quantum chemistry, condensed matter physics, and optimization. The Variational Quantum Eigensolver (VQE) has shown promise for small systems but faces signifi...
Time-frequency Talbot effect as Clifford operations on entangled time-frequency GKP states
Thomas Pousset, Romain Dalidet, Laurent Labonté +1 more·Mar 25, 2026
The Talbot effect -- a near-field diffraction phenomenon in which a periodic wavefront self-images at regular distances -- can be transposed to the time--frequency domain via the space--time duality between diffraction and dispersive broadening. We e...
Mitigating Dynamic Crosstalk with Optimal Control
Matthias G. Krauss, Luise C. Butzke, Christiane P. Koch·Mar 25, 2026
The prevalence of quantum crosstalk is an important barrier to scaling frequency-addressable qubit architectures, with dynamic crosstalk being particularly difficult to detect and suppress. This form of crosstalk refers to unintended interactions dri...
Experimental Demonstration of a Brachistochrone Nonadiabatic Holonomic Quantum-Gate Scheme in a Trapped Ion
Xi Wang, Hui Ren, L. -N. Sun +5 more·Mar 25, 2026
Nonadiabatic holonomic quantum computation (NHQC) offers intrinsic resilience to certain control imperfections. However, conventional nonadiabatic holonomic protocols are constrained by the fixed-pulse-area condition, which limits flexibility and pro...
Efficient Preparation of Graph States using the Quotient-Augmented Strong Split Tree
Nicholas Connolly, Shin Nishio, Dan E. Browne +2 more·Mar 25, 2026
Graph states are a key resource for measurement-based quantum computation and quantum networking, but state-preparation costs limit their practical use. Graph states related by local complement (LC) operations are equivalent up to single-qubit Cliffo...
Initial State Memory in Finite Random Brickwork Circuits
Jakob Bannister, Katja Klobas, Colin Rylands +1 more·Mar 24, 2026
We ask under what conditions a finite brickwork circuit of random gates retains local information about the initial state. To answer this question we measure the averaged Frobenius distance between the reduced states obtained by evolving two arbitrar...
Elucidating the Synergetic Interplay between Average Intermolecular Coupling and Coupling Disorder in Short-Time Exciton Transfer
Siwei Wang, Guangming Liu, Hsing-Ta Chen·Mar 24, 2026
Exciton transport in molecular aggregates is a fundamental process governing the performance of organic optoelectronics and light-harvesting systems. While most theoretical studies have emphasized long-time transport behavior, recent advances in ultr...
Global control via quantum actuators
Roberto Menta, Francesco Cioni, Riccardo Aiudi +2 more·Mar 24, 2026
We introduce the concept of quantum actuators as mediators for globally controlled quantum computation. Auxiliary quantum systems act as controllable elements that transiently store and release interaction energy, enabling the selective activation of...
Imprecise quantum steering inequalities in tripartite systems
Yan Zhao, Li-Juan Li, Zheng-Peng Xu +2 more·Mar 24, 2026
Quantum steering, as a manifestation of nonlocal quantum correlations, plays a crucial role in enabling various quantum information processing tasks. However, practical implementations are often hindered by significant challenges arising from imperfe...
STAR-Magic Mutation: Even More Efficient Analog Rotation Gates for Early Fault-Tolerant Quantum Computer
Riki Toshio, Shota Kanasugi, Jun Fujisaki +3 more·Mar 24, 2026
We introduce STAR-magic mutation, an efficient protocol for implementing logical rotation gates on early fault-tolerant quantum computers. This protocol judiciously combines two of the latest state preparation protocols: transversal multi-rotation pr...
Probing the Spacetime Structure of Entanglement in Monitored Quantum Circuits with Graph Neural Networks
Javad Vahedi, Stefan Kettemann·Mar 23, 2026
Global entanglement in quantum many-body systems is inherently nonlocal, raising the question of whether it can be inferred from local observations. We investigate this problem in monitored quantum circuits, where projective measurements generate cla...
Identical, independent quantum weak measurements violate objective realism
Tomasz Rybotycki, Tomasz Białecki, Josep Batle +4 more·Mar 23, 2026
We demonstrate violation of objective realism in quantum world using unconstrained weak measurements. Instead of limited Leggett-Garg approach with artificial bounds on the observed values, we assume two identical and indepenent weak detectors and fi...
Implemetation of a shooting technique for quantum optimal control on spin qudits
Paul-Louis Etienney, Paul-Antoine Hervieux, Denis Jankovic +3 more·Mar 23, 2026
High-fidelity control of quantum systems is essential for scalable quantum technologies. We introduce a shooting-based quantum optimal control algorithm for systems of finite-dimensional Hilbert spaces, and demonstrate its performances through numeri...
Gate-based Readout and Cooling of Neutral Atoms
Richard Bing-Shiun Tsai, Lewis R. B. Picard, Xiangkai Sun +3 more·Mar 23, 2026
Neutral atom arrays have seen tremendous progress in quantum simulation, quantum metrology, and fault-tolerant quantum computing. However, hardware constraints such as atom loss and heating remain significant challenges. In this work, we introduce a ...
Neural network approach to mitigating intra-gate crosstalk in superconducting CZ gates
Yiming Yu, Yexiong Zeng, Ye-Hong Chen +2 more·Mar 23, 2026
The potential of quantum computing is fundamentally constrained by the inherent susceptibility of qubits to noise and crosstalk, particularly during multi-qubit gate operations. Existing strategies, such as hardware isolation and dynamical decoupling...
High-yield integration design of fixed-frequency superconducting qubit systems using siZZle-CZ gates
Kazuhisa Ogawa, Yutaka Tabuchi, Makoto Negoro·Mar 23, 2026
Fixed-frequency transmon qubits, characterized by simple architectures and long coherence times, are promising platforms for large-scale quantum computing. However, the rapidly increasing frequency collisions, which directly reduce the fabrication yi...