Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Efficient tensor-network simulations of weakly-measured quantum circuits
Darren Pereira, Leonardo Banchi·Oct 8, 2025
We present a tensor-network-based method for simulating a weakly-measured quantum circuit. In particular, we use a Markov chain to efficiently sample measurements and contract the tensor network, propagating their effect forward along the spatial dir...
Preparation of initial states with open and periodic boundary conditions on quantum devices using matrix product states
Yibin Guo, Manuel Schneider, Takis Angelides +3 more·Oct 8, 2025
We present a framework for preparing quantum states from matrix product states (MPS) with open and periodic boundary conditions on quantum devices. The MPS tensors are mapped to unitary gates, which are subsequently decomposed into native gates on qu...
Phonon-induced two-axis spin squeezing with decoherence reduction in hybrid spin-optomechanical system
Feng Qiao, Zu-Jian Ying·Oct 8, 2025
We propose a scheme to implement Heisenberg-limited spin squeezing in a hybrid cavity optomechanical-spin system. In our system, $N$ two-level systems are coupled via Tavis-Cummings interactions to a mechanical resonator (MR) in a standard optomechan...
Expressive and Scalable Quantum Fusion for Multimodal Learning
Tuyen Nguyen, Trong Nghia Hoang, Phi Le Nguyen +2 more·Oct 8, 2025
The aim of this paper is to introduce a quantum fusion mechanism for multimodal learning and to establish its theoretical and empirical potential. The proposed method, called the Quantum Fusion Layer (QFL), replaces classical fusion schemes with a hy...
Breaking the Treewidth Barrier in Quantum Circuit Simulation with Decision Diagrams
Bin Cheng, Ziyuan Wang, Ruixuan Deng +2 more·Oct 8, 2025
Classical simulation of quantum circuits is a critical tool for validating quantum hardware and probing the boundary between classical and quantum computational power. Existing state-of-the-art methods, notably tensor network approaches, have computa...
Fast-forwardable Lindbladians imply quantum phase estimation
Zhong-Xia Shang, Naixu Guo, Patrick Rebentrost +3 more·Oct 8, 2025
Quantum phase estimation (QPE) and Lindbladian dynamics are both foundational in quantum information science and central to quantum algorithm design. In this work, we bridge these two concepts: certain simple Lindbladian processes can be adapted to p...
Mereological Quantum Phase Transitions
Paolo Zanardi, Emanuel Dallas, Faidon Andreadakis·Oct 7, 2025
We introduce the novel concept of mereological quantum phase transition (m-QPTs). Our framework is based on a variational family of operator algebras defining generalized tensor product structures (g-TPS), a parameter-dependent Hamiltonian, and a qua...
Classical simulation of noisy random circuits from exponential decay of correlation
Su-un Lee, Soumik Ghosh, Changhun Oh +3 more·Oct 7, 2025
We study the classical simulability of noisy random quantum circuits under general noise models. While various classical algorithms for simulating noisy random circuits have been proposed, many of them rely on the anticoncentration property, which ca...
Quantum matrix arithmetics with Hamiltonian evolution
Christopher Kang, Yuan Su·Oct 7, 2025
The efficient implementation of matrix arithmetic operations underpins the speedups of many quantum algorithms. We develop a suite of methods to perform matrix arithmetics -- with the result encoded in the off-diagonal blocks of a Hamiltonian -- usin...
Batched high-rate logical operations for quantum LDPC codes
Qian Xu, Hengyun Zhou, Dolev Bluvstein +5 more·Oct 7, 2025
High-rate quantum LDPC (qLDPC) codes reduce memory overhead by densely packing many logical qubits into a single block of physical qubits. Here we extend this concept to high-rate computation by constructing \emph{batched} fault-tolerant operations t...
Extended validations on photon number resolving detector based Gaussian boson sampling with low noises
Yang Ji, Yongzheng Wu, Shi Wang +3 more·Oct 7, 2025
Gaussian boson sampling (GBS) is a variety of boson sampling overcoming the stable single-photon preparation difficulty of the later. However, like those in the original version, noises in GBS will also result in the deviation of output patterns and ...
Hybrid quantum-classical analog simulation of two-dimensional Fermi-Hubbard models with neutral atoms
Sergi Julià-Farré, Antoine Michel, Christophe Domain +11 more·Oct 7, 2025
We experimentally study the two-dimensional Fermi-Hubbard model using a Rydberg-based quantum processing unit in the analog mode. Our approach avoids encoding directly the original fermions into qubits and instead relies on reformulating the original...
Entanglement dynamics and performance of two-qubit gates for superconducting qubits under non-Markovian effects
Kiyoto Nakamura, Joachim Ankerhold·Oct 7, 2025
Within a numerically exact simulation technique, the dissipative dynamics of a two-qubit architecture is considered in which each qubit couples to its individual noise source (reservoir). The goal is to reveal the role of subtle qubit-reservoir corre...
Dynamic Scheduling in Fiber and Spaceborne Quantum Repeater Networks
Paolo Fittipaldi·Oct 7, 2025
The problem of scheduling in quantum networks amounts to choosing which entanglement swapping operations to perform to better serve user demand. The choice can be carried out following a variety of criteria (e.g. ensuring all users are served equally...
Efficient Post-Selection for General Quantum LDPC Codes
Seok-Hyung Lee, Lucas H. English, Stephen D. Bartlett·Oct 7, 2025
Post-selection strategies that discard low-confidence computational results can significantly improve the effective fidelity of quantum error correction at the cost of reduced acceptance rates, which can be particularly useful for offline resource st...
The PESCADO Method for Autonomous Systems: An Application to Photoionization at Near-optical Wavelengths
Selstø Sølve, Bendik Steinsvåg Dalen·Oct 7, 2025
In a recent publication, Dalen, and Selstø, Phys. Rev. A {\bf 111}, 033116 (2025), it was demonstrated how converged photo electron spectra could be determined using a complex absorbing potential on a truncated numerical domain considerably smaller t...
Cored product codes for quantum self-correction in three dimensions
Brenden Roberts, Jin Ming Koh, Yi Tan +1 more·Oct 7, 2025
The existence of self-correcting quantum memories in three dimensions is a long-standing open question at the interface between quantum computing and many-body physics. We take the perspective that large contributions to the entropy arising from fine...
Overshifted Parameter-Shift Rules: Optimizing Complex Quantum Systems with Few Measurements
Leonardo Banchi, Dominic Branford, Chetan Waghela·Oct 6, 2025
Gradient-based optimization is a key ingredient of variational quantum algorithms, with applications ranging from quantum machine learning to quantum chemistry and simulation. The parameter-shift rule provides a hardware-friendly method for evaluatin...
Peaked quantum advantage using error correction
Abhinav Deshpande, Bill Fefferman, Soumik Ghosh +2 more·Oct 6, 2025
A key issue of current quantum advantage experiments is that their verification requires a full classical simulation of the ideal computation. This limits the regime in which the experiments can be verified to precisely the regime in which they are a...
Rapid Mixing of Quantum Gibbs Samplers for Weakly-Interacting Quantum Systems
Štěpán Šmíd, Richard Meister, Mario Berta +1 more·Oct 6, 2025
Dissipative quantum algorithms for state preparation in many-body systems are increasingly recognised as promising candidates for achieving large quantum advantages in application-relevant tasks. Recent advances in algorithmic, detailed-balance Lindb...