Papers
Live trends in quantum computing research, updated daily from arXiv.
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Obtaining Accurate Ground-State Properties on Near-term Quantum Devices
Qi-Ming Ding, Jiawei Peng, Junxiang Huang +6 more·Oct 24, 2025
Accurate ground-state calculations on noisy quantum computers are fundamentally limited by restricted ansatz expressivity and unavoidable hardware errors. We introduce a hybrid-quantum classical framework that simultaneously addresses these challenge...
Scrambling Without Chaos in Random Free-Fermionic Systems
Ali Mollabashi, Mohammad-Javad Vasli·Oct 24, 2025
We study the role of randomness in the scrambling of quantum information within integrable free-fermionic systems. Considering quadratic Hamiltonians with varying degrees of randomness, we analyze entanglement-based measures to characterize the scram...
Fast adaptive discontinuous basis sets for electronic structure
Yulong Pan, Michael Lindsey·Oct 24, 2025
We develop a discontinuous Galerkin (DG) framework for automatically constructing adaptive basis sets for electronic structure calculations. By allowing basis functions to be discontinuous across element interfaces, our approach supports flexible com...
Unveiling the BEC-droplet transition with Rayleigh superradiant scattering
Mithilesh K. Parit, Mingchen Huang, Ziting Chen +3 more·Oct 24, 2025
Light scattering plays an essential role in uncovering the properties of quantum states through light-matter interactions. Here, we explore the transition from Bose-Einstein condensate (BEC) to droplets in a dipolar $^{166}$Er gas by employing superr...
Quantum Neural Network Architectures for Multivariate Time-Series Forecasting
Sandra Ranilla-Cortina, Diego A. Aranda, Jorge Ballesteros +4 more·Oct 24, 2025
In this paper, we address the challenge of multivariate time-series forecasting using quantum machine learning techniques. We introduce adaptation strategies that extend variational quantum circuit models, traditionally limited to univariate data, to...
Role of inefficient measurement in realizing post-selection-based non-Hermitian qubits
Roson Nongthombam, Aman Verma, Amarendra K. Sarma·Oct 24, 2025
Post-selecting against quantum jumps into the ground state confines the evolution of the three-level system to the excited states manifold, effectively realizing a PT-symmetric non-Hermitian qubit. In this work, by introducing post-selection efficien...
Access to Klein Tunneling via Space-Time Modulation
Furkan Ok, Amir Bahrami, Christophe Caloz·Oct 24, 2025
We show that space-time modulation of electromagnetic potentials enables Klein tunneling far below the static threshold. The derived kinematics reveal oblique transitions that can connect opposite-energy continua without requiring their overlap, yiel...
Runtime reduction in lattice surgery utilizing time-like soft information
Yutaro Akahoshi, Riki Toshio, Jun Fujisaki +3 more·Oct 24, 2025
Runtime optimization of the quantum computing within a given computational resource is important to achieve practical quantum advantage. In this paper, we propose a runtime reduction protocol for the lattice surgery, which utilizes the soft informati...
Scalable protocol to coherence estimation from scarce data: Theory and experiment
Qi-Ming Ding, Ting Zhang, Hui Li +1 more·Oct 24, 2025
Key quantum features like coherence are the fundamental resources enabling quantum advantages and ascertaining their presence in quantum systems is crucial for developing quantum technologies. This task, however, faces severe challenges in the noisy ...
Enhancement of femtosecond photon echo signals from an inhomogeneously broadened InAs quantum dot ensemble using chirped pulses
Yuta Kochi, Yutaro Kinoshita, Masanari Watanabe +2 more·Oct 24, 2025
Photon echo (PE) techniques offer a promising approach to optical quantum memory, yet their implementation in conventional platforms, such as rare-earth-ion-doped crystals, is hindered by limited bandwidths. Semiconductor quantum dot (QD) ensembles, ...
Myopic Entropy Scheduling for Ramsey Magnetometry
Julian Greentree, William Moran, Rob Evans +3 more·Oct 24, 2025
This paper presents an entropy based adaptive measurement sequence strategy for quantum sensing of magnetic fields. To physically ground our ideas we consider a sensor employing a nitrogen vacancy center in diamond, however our approach is applicable...
Tunable Asymmetric Delay Attack in Quantum Clock Synchronization
Hui Han, Haotian Teng, Hailong Xu +7 more·Oct 24, 2025
Quantum clock synchronization underpins modern secure communications and critical infrastructure, yet its fundamental dependence on channel reciprocity introduces an exploitable vulnerability to asymmetric delay attacks. Current attack strategies rel...
Stability of Maximum-Entropy Inference in Finite Dimensions
James Tian·Oct 24, 2025
We study maximum-entropy inference for finite-dimensional quantum states under linear moment constraints. Given expectation values of finitely many observables, the feasible set of states is convex but typically non-unique. The maximum-entropy princi...
A broadband single microwave-photon detector insensitive to the thermal noise
Y. Q. Chai, M. Y. Wang, S. N. Wang +2 more·Oct 24, 2025
Thermal noise is one of the physical obstacles that constrain the achievable detection sensitivities of various detectors. Indeed, as we showed in a recent paper (PRB 111, 024501 (2025)), the usual Josephson threshold detector (JTD) operated in an eq...
Harnessing Intrinsic Noise for Quantum Simulation of Open Quantum Systems
Sameer Dambal, Akira Sone, Yu Zhang·Oct 24, 2025
Simulating open quantum systems on quantum computers presents a fundamental challenge: open quantum dynamics are intrinsically nonunitary, whereas quantum computers operate through unitary evolution. Conventional approaches overcome this mismatch by ...
The spinterface mechanism for the chiral-induced spin selectivity effect: A Critical Perspective
Subhajit Sarkar, Amos Sharoni, Oliver L. A. Monti +1 more·Oct 24, 2025
The chiral-induced spin selectivity (CISS) effect, whereby chiral molecules preferentially transmit electrons of one spin orientation, remains one of the most intriguing and debated phenomena at the interface of spintronics, molecular electronics, an...
Overlapped-repetition Shor codes achieving fourfold asymptotic rate
En-Jui Chang·Oct 23, 2025
Introducing controlled overlap among a few repetition blocks yields a fourfold asymptotic rate improvement while preserving an average stabilizer weight of \(4\). Substituting the overlapped outer layer with an LDPC code further produces a family of ...
Characterizing Neon Thin Film Growth with an NbTiN Superconducting Resonator Array
Kyle Matkovic, Patrick Russell, Andrew Palmer +6 more·Oct 23, 2025
Electrons levitating above the surface of solid neon have recently emerged as a promising platform for high-quality qubits. The morphology and uniformity of the neon growth in these systems is crucial for qubit performance in a scalable architecture....
Quantum Interference and the Limits of Separability
Sebastian Horvat·Oct 23, 2025
Quantum theory implies, and empirical evidence confirms, that while particles $\textit{can}$ exhibit wave-like behavior in interferometric experiments, this behavior is so limited as $\textit{not}$ to allow for third- and higher-order interference. T...
Certifying Randomness or its Lack Thereof for General Network Scenarios
Maria Ciudad Alañón, Daniel Centeno, Andrew Watford +1 more·Oct 23, 2025
The certification of intrinsic randomness is foundational to quantum information theory and central in many practical applications thereof, such as in the generation of unquestionably random numbers and in cryptographic protocols. Device-independent ...