Papers
Live trends in quantum computing research, updated daily from arXiv.
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Density Matrix-based Dynamics for Quantum Robotic Swarms
Maria Mannone, Mahathi Anand, Peppino Fazio +1 more·Sep 7, 2025
In a robotic swarm, parameters such as position and proximity to the target can be described in terms of probability amplitudes. This idea led to recent studies on a quantum approach to the definition of the swarm, including a block-matrix representa...
From Membership-Privacy Leakage to Quantum Machine Unlearning
Junjian Su, Runze He, Guanghui Li +4 more·Sep 7, 2025
Quantum machine learning (QML) has the potential to achieve quantum advantage for specific tasks by combining quantum computation with classical machine learning (ML). In classical ML, a significant challenge is membership-privacy leakage, whereby an...
A brain-inspired paradigm for scalable quantum vision
Chenghua Duan, Xiuxing Li, Wending Zhao +6 more·Sep 7, 2025
One of the fundamental tasks in machine learning is image classification, which serves as a key benchmark for validating algorithm performance and practical potential. However, effectively processing high-dimensional, detail-rich images, a capability...
Quantum Radar for ISAC: Sum-Rate Optimization
Abdulmohsen A. Alsaui, O. Dobre, Neel Kanth Kundu +2 more·Sep 7, 2025
Integrated sensing and communication (ISAC) is emerging as a key enabler for spectrum-efficient and hardware-converged wireless networks. However, classical radar systems within ISAC architectures face fundamental limitations under low signal power a...
High-order Magnus Expansion for Hamiltonian Simulation
Di Fang, Diyi Liu, Shuchen Zhu·Sep 7, 2025
Efficient simulation of quantum dynamics with time-dependent Hamiltonians is important not only for time-varying systems but also for time-independent Hamiltonians in the interaction picture. Such simulations are more challenging than their time-inde...
Genetic optimization of ansatz expressibility for enhanced variational quantum algorithm performance
Manish Mallapur, Ronit Raj, Ankur Raina·Sep 6, 2025
Variational quantum algorithms have emerged as a leading paradigm that extracts practical computation from near-term intermediate-scale quantum devices, enabling advances in quantum chemistry simulations, combinatorial optimization, and quantum machi...
Tunneling of bosonic qubits under local dephasing through microscopic approach
Alberto Ferrara, Farzam Nosrati, Andrea Smirne +2 more·Sep 6, 2025
We present a microscopic derivation of a master equation for two-component bosons (bosonic qubits) which tunnel between spatially separated modes under local dephasing noise. Starting from the full system-bath Hamiltonian with Lorentzian coupling dis...
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 ...
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...
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...
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...
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...
Qumode-Based Variational Quantum Eigensolver for Molecular Excited States.
Rishab Dutta, Cameron Cianci, A. Soudackov +5 more·Sep 5, 2025
We introduce the qumode subspace variational quantum eigensolver (QSS-VQE), a hybrid quantum-classical algorithm for computing molecular excited states using the Fock basis of bosonic qumodes in circuit quantum electrodynamics (cQED) devices. This ap...
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,...
Practical Fidelity Limits of Toffoli Gates in Superconducting Quantum Processors
M. AbuGhanem·Sep 5, 2025
High-fidelity multi-qubit gates are a critical resource for near-term quantum computing, as they underpin the execution of both quantum algorithms and fault-tolerant protocols. The Toffoli gate (CCNOT), in particular, plays a central role in quantum ...
Simulated Laser Cooling and Magneto-Optical Trapping of Group IV Atoms
Geoffrey Zheng, Jianwei Wang, Mohit Verma +3 more·Sep 4, 2025
We present a scheme for laser cooling and magneto-optical trapping of the Group IV (a.k.a. Group 14 or tetrel) atoms silicon (Si), germanium (Ge), tin (Sn), and lead (Pb). These elements each possess a strong Type-II transition ($J \rightarrow J' = J...
Quantum-inspired dynamical models on quantum and classical annealers
Philipp Hanussek, Jakub Pawłowski, Zakaria Mzaouali +1 more·Sep 4, 2025
We propose a practical, physics-inspired benchmarking suite to challenge both quantum and classical computers by mapping real-time quantum dynamics to a common optimization format. Using a parallel-in-time encoding, we convert the real-time propagato...
Monte Carlo simulation of random circuit sampling in quantum computing
A. Raab·Sep 4, 2025
We develop Monte Carlo methods for sampling random states and corresponding bit strings in qubit systems. To this end, we derive exact probability density functions that yield the Porter-Thomas distribution in the limit of large systems. We apply the...
A method for the numerical analysis of hybrid lumped-distributed superconducting quantum circuits
Simona Zaccaria, Antonio Gnudi·Sep 3, 2025
We present a method for the numerical analysis of superconducting quantum circuits combining lumped elements, either linear or non-linear (i.e.~Josephson junctions), and distributed coplanar waveguide (CPW) structures. CPW transmission lines and mult...
Quantum simulation of out-of-equilibrium dynamics in gauge theories
Jad C. Halimeh, Niklas Mueller, J. Knolle +2 more·Sep 3, 2025
Recent advances in quantum technologies have enabled quantum simulation of gauge theories -- some of the most fundamental frameworks of nature -- in regimes far from equilibrium, where classical computation is severely limited. These simulators, prim...