Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Slow dynamics from a nested hierarchy of frozen states
Vanja Marić, Luka Paljk, Lenart Zadnik·Oct 3, 2025
We identify the mechanism of slow heterogeneous relaxation in quantum kinetically constrained models (KCMs) in which the potential energy strength is controlled by a coupling parameter. The regime of slow relaxation includes the large-coupling limit....
Spatial uniformity of g-tensor and spin-orbit interaction in germanium hole spin qubits
Inga Seidler, Bence Hetényi, Lisa Sommer +12 more·Oct 3, 2025
Holes in Ge/SiGe heterostructures are now a leading platform for semiconductor spin qubits, thanks to the high confinement quality, two-dimensional arrays, high tunability, and larger gate structure dimensions. One limiting factor for the operation o...
Bounds on Atomistic Disorder for Scalable Electron Shuttling
Raphaël J. Prentki, Pericles Philippopoulos, Mohammad Reza Mostaan +1 more·Oct 3, 2025
Electron shuttling is emerging as a key enabler of scalable silicon spin-qubit quantum computing, but fidelities are limited by atomistic disorder. We introduce a multiscale simulation framework combining time-dependent finite-element electrostatics ...
Analytical solution of a free-fermion chain with time-dependent ramps
Viktor Eisler, Riccarda Bonsignori, Stefano Scopa·Oct 3, 2025
We provide an exact analytical solution of the single-particle Schrödinger equation for a chain of non-interacting fermions subject to a time-dependent linear potential, with its slope varied as an arbitrary function of time. The resulting dynamics e...
Polarization dependence of spin-electric transitions in molecular exchange qubits
Filippo Troiani, Athanassios K. Boudalis·Oct 3, 2025
Quasi-optical experiments are emerging as a powerful technique to probe magnetic transitions in molecular spin systems. However, the simultaneous presence of the electric- and magnetic-dipole induced transitions poses the challenge of discriminating ...
Modified logarithmic Sobolev inequalities for CSS codes
Sebastian Stengele, Ángela Capel, Li Gao +5 more·Oct 3, 2025
We consider the class of Davies quantum semigroups modelling thermalization for translation-invariant Calderbank-Shor-Steane (CSS) codes in D dimensions. We prove that conditions of Dobrushin-Shlosman-type on the quantum Gibbs state imply a modified ...
To break, or not to break: Symmetries in adaptive quantum simulations, a case study on the Schwinger model
Karunya Shailesh Shirali, Kyle Sherbert, Yanzhu Chen +4 more·Oct 3, 2025
We investigate the role of symmetries in constructing resource-efficient operator pools for adaptive variational quantum eigensolvers. In particular, we focus on the lattice Schwinger model, a discretized model of $1+1$ dimensional electrodynamics, w...
New Junction Condition and Casimir effect for Network CFT
Sinan Pang, Ling Li, Tian-Ming Zhao +1 more·Oct 3, 2025
Recently, BCFT and ICFT have been generalized to the CFT on networks (NCFT). A key aspect of NCFT is how we connect the CFTs in different edges at the nodes of the network. For a free scalar field, one naturally requires that the scalar fields are co...
Probability distribution reconstruction using circuit cutting applied to a variational classifier
Niels M. P. Neumann, Carlos M. R. Rocha, Jasper Verbree +1 more·Oct 3, 2025
Significant efforts are being spent on building a quantum computer. At the same time, developments in quantum software are rapidly progressing. Insufficient quantum resources often are the problem when running quantum algorithms. New techniques can a...
Tradeoffs on the volume of fault-tolerant circuits
Anirudh Krishna, Gilles Zémor·Oct 3, 2025
Dating back to the seminal work of von Neumann [von Neumann, Automata Studies, 1956], it is known that error correcting codes can overcome faulty circuit components to enable robust computation. Choosing an appropriate code is non-trivial as it must ...
Boundary Time Crystals: Beyond Mean-Field Theory
Zeping Liu, Yaotian Li, Zhaoyu Fei +1 more·Oct 3, 2025
Boundary time crystals are a class of exotic dissipative quantum phases that spontaneously break continuous time-translation symmetry in the thermodynamic limit of open quantum systems. In finite-size systems, the long-time evolution of boundary time...
Non-reciprocal Synchronization in Thermal Rydberg Ensembles
Yunlong Xue, Zhengyang Bai·Oct 3, 2025
Optical non-reciprocity is a fundamental phenomenon in photonics. It is crucial for developing devices that rely on directional signal control, such as optical isolators and circulators. However, most research in this field has focused on systems in ...
Handling the Cornell potential within the Lagrange-mesh method in momentum space
Cyrille Chevalier, Joachim Viseur·Oct 3, 2025
This work presents an alternative methodology for computing potentials matrix elements within the Lagrange-mesh method in momentum space. The proposed approach extends the range of treatable potentials to include previously inaccessible cases, such a...
MAQCY: Modular Atom-Array Quantum Computing with Space-Time Hybrid Multiplexing
Andrew Byun, Chanseul Lee, Eunsik Yoon +2 more·Oct 3, 2025
We present a modular atom-array quantum computing architecture with space-time hybrid multiplexing (MAQCY), a dynamic optical tweezer-based protocol for fully connected and scalable universal quantum computation. By extending the concept of globally ...
Scalable Quantum Optimisation using HADOF: Hamiltonian Auto-Decomposition Optimisation Framework
Namasi G Sankar, Georgios Miliotis, Simon Caton·Oct 3, 2025
Quantum Annealing (QA) and QAOA are promising quantum optimisation algorithms used for finding approximate solutions to combinatorial problems on near-term NISQ systems. Many NP-hard problems can be reformulated as Quadratic Unconstrained Binary Opti...
Fermionic optimal transport
Rocco Duvenhage, Dylan van Zyl, Paola Zurlo·Oct 3, 2025
Quadratic Wasserstein distances are obtained between dynamical systems (with states as special case), on $\mathbb{Z}_2$-graded von Neumann algebras. This is achieved through a systematic translation from non-graded to $\mathbb{Z}_2$-graded transport ...
Universal classical-quantum channel resolvability and private channel coding
Takaya Matsuura, Masahito Hayashi, Min-Hsiu Hsieh·Oct 3, 2025
We address the problem of constructing fully universal private channel coding protocols for classical-quantum (c-q) channels. Previous work constructed universal decoding strategies, but the encoder relied on random coding, which prevents fully unive...
A Hardware Accelerator for the Goemans-Williamson Algorithm
D. A. Herrera-Martí, E. Guthmuller, J. Fereyre·Oct 3, 2025
The combinatorial problem Max-Cut has become a benchmark in the evaluation of local search heuristics for both quantum and classical optimisers. In contrast to local search, which only provides average-case performance guarantees, the convex semidefi...
Quantum sensing with discrete time crystals in the Lipkin-Meshkov-Glick Model
Rahul Ghosh, Bandita Das, Victor Mukherjee·Oct 3, 2025
Quantum phase transitions have been shown to be highly beneficial for quantum sensing, owing to diverging quantum Fisher information close to criticality. In this work we consider a periodically modulated Lipkin-Meshkov-Glick model to show that discr...
Accurate and Effective Model for Coexistence of Classical and Quantum Signals In Optical Fibers
Lucas Alves Zischler, Çağla Özkan, Tristan Vosshenrich +10 more·Oct 3, 2025
The rising interest in quantum-level communication has resulted in proposals for coexistence schemes with classical signals within the same fiber optic channel, where the most recent proposals leverage novel fibers designed for space-division multipl...