Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
$Δ_T$ Noise as a Robust Diagnostic for Chiral, Helical and Trivial Edge Modes
Sachiraj Mishra, Colin Benjamin·Sep 20, 2025
In this article we demonstrate that $Δ_T$ noise provides a sensitive, practical probe for distinguishing chiral edge modes from topological helical and trivial (non-topological) helical edge transport. Measured under zero-current conditions, $Δ_T$ no...
Multipartite quantum entanglement in $\mathcal{PT}$-symmetric molecular optomechanics: Nonreciprocal enhancement and thermal resilience to \SI{500}{\kelvin}
E. Kongkui Berinyuy, C. Tchodimou, P. Djorwé +2 more·Sep 20, 2025
We present a theoretical framework for a $\mathcal{PT}$-symmetric double-cavity molecular optomechanical system demonstrating nonreciprocal enhancement of multipartite quantum entanglement at elevated temperatures. All bipartite entanglement channels...
Relativistic Path-Integral Origin of the Dirac Equation, Quantum Collapse, Decoherence and Non-Hermitian Phenomena
Wei Wen·Sep 20, 2025
Relativity and quantum mechanics are two cornerstones of modern physics, yet their unification within a single-particle path integral and a dynamical explanation of quantum measurement remain unresolved. Historically, these two problems have been tre...
Locally Purified Maximally Mixed States At Scale: Entanglement Pruning and Symmetries
Amit Jamadagni, Eugene Dumitrescu·Sep 19, 2025
Locally Purified Density Operators (LPDOs) are state-of-the-art tensor network ansatze candidates that efficiently represent mixed quantum states at scale. However, given their non-uniqueness, their representational complexity is generally sub-optima...
Multimode Gaussian steady state engineering in optomechanical systems with a squeezed reservoir
Nahid Yazdi, Stefano Zippilli, David Vitali·Sep 19, 2025
We investigate a theoretical protocol for the dissipative stabilization of mechanical quantum states in a multimode optomechanical system composed of multiple optical and mechanical modes. The scheme employs a single squeezed reservoir that drives on...
Sequential analysis in a continuous spin-noise quantum sensor
Elisabet Roda-Salichs, Giulio Gasbarri, Antoni Alou +5 more·Sep 19, 2025
Many control and detection applications require real-time analysis of signals from sensors, in order to quickly and accurately act upon events revealed by the sensors. Such signal analysis benefits from statistical models of signal and sensor behavio...
Giant shot noise in superconductor/ferromagnet junctions with orbital-symmetry-controlled spin-orbit coupling
César González-Ruano, Chenghao Shen, Pablo Tuero +5 more·Sep 19, 2025
By measuring the shot noise, a consequence of charge quantization, in superconductor/insulator/ferromagnet (V/MgO/Fe) junctions, we discover a giant increase, orders of magnitude larger than expected. The origin of this giant noise is a peculiar real...
Qubit-oscillator-based gate implementations for approximate Gottesman-Kitaev-Preskill codes
Lukas Brenner, Beatriz Dias, Robert Koenig·Sep 19, 2025
We consider hybrid qubit-oscillator systems together with Gaussian, multi-qubit as well as qubit-controlled Gaussian unitaries. We propose implementations of logical gates for approximate Gottesman-Kitaev-Preskill codes in this model using two oscill...
Hamiltonian truncation and quantum simulation of strong-field QED beyond tree level
Patrick Draper, Luis Hidalgo, Anton Ilderton·Sep 19, 2025
Quantum electrodynamics in strong background fields provides an interesting class of problems for classical and quantum simulation. In this paper we formulate simulations of polarization (helicity) flip for a photon colliding with a high-intensity pl...
Fault-tolerant quantum computing with a high-rate symplectic double code
Naoyuki Kanomata, Hayato Goto·Sep 18, 2025
High-rate and large-distance quantum codes are expected to make fault-tolerant quantum computing more efficient, but most of them lack efficient fault-tolerant encoded-state preparation methods. We propose such a fault-tolerant encoder for a [[30, 6,...
Dynamical decoupling protection for three-level systems
P. Z. Zhao, Lei Qiao·Sep 18, 2025
In addition to the traditional two-level system, the three-level system serves as another important elemental building block for the manipulation of qubits. However, the quantum information processing in the three-level system is also subject to the ...
Simultaneous Speedmeter and Position-Meter Response in a Single Tabletop Interferometer
Mikhail Korobko, Xiang Li, Torben Sobottke +3 more·Sep 18, 2025
Quantum radiation-pressure noise (QRPN) limits the low-frequency sensitivity of gravitational wave detectors. The established method for suppressing QRPN is the injection of frequency-dependent squeezed light. It requires long-baseline filter cavitie...
Magnetic-Field and Temperature Limits of a Kinetic-Inductance Traveling-Wave Parametric Amplifier
Lucas M. Janssen, Farzad Faramarzi, Henry G. LeDuc +5 more·Sep 18, 2025
Kinetic-inductance traveling-wave parametric amplifiers (KI-TWPAs) offer broadband near-quantum-limited amplification with high saturation power. Due to the high critical magnetic fields of high-kinetic-inductance materials, KI-TWPAs should be resili...
Imaging of electrical signals in a quantum SiC microscope
A. Suhana, T. A. U. Svetikova, C. Schneider +3 more·Sep 18, 2025
We report the experimental realization of a quantum silicon carbide microscope (QSiCM) and demonstrate its functionality by imaging magnetic fields generated by electrical currents. We employ a dual-frequency sensing protocol to enhance the readout c...
Spin-photon coupling using circular double quantum dots
Ferdinand Omlor, Florinda Viñas Boström, Martin Leijnse·Sep 18, 2025
We propose and analyze a microwave spin-photon interface based on a circular double quantum dot, inspired by recent experimental observations of anisotropic g-factors and ring states in InAs nanowires. We develop an effective theoretical model captur...
The superconducting grid-states qubit
Long B. Nguyen, Hyunseong Kim, Dat T. Le +9 more·Sep 18, 2025
Decoherence errors arising from noisy environments remain a central obstacle to progress in quantum computation and information processing. Quantum error correction (QEC) based on the Gottesman-Kitaev-Preskill (GKP) protocol offers a powerful strateg...
Quantum advantage without exponential concentration: Trainable kernels for symmetry-structured data
Laura J. Henderson, Kerstin Beer, Salini Karuvade +3 more·Sep 17, 2025
Quantum kernel methods promise enhanced expressivity for learning structured data, but their usefulness has been limited by kernel concentration and barren plateaus. Both effects are mathematically equivalent and suppress trainability. We analyticall...
Quantum Reinforcement Learning-Guided Diffusion Model for Image Synthesis via Hybrid Quantum-Classical Generative Model Architectures
Chi-Sheng Chen, En-Jui Kuo·Sep 17, 2025
Diffusion models typically employ static or heuristic classifier-free guidance (CFG) schedules, which often fail to adapt across timesteps and noise conditions. In this work, we introduce a quantum reinforcement learning (QRL) controller that dynamic...
Design and Dynamics of Two-Qubit Gates with Motional States of Electrons on Helium
Oskar Leinonen, Jonas B. Flaten, Stian D. Bilek +6 more·Sep 17, 2025
Systems of individual electrons electrostatically trapped on condensed noble gas surfaces have recently attracted considerable interest as potential platforms for quantum computing. The electrons serve as charge qubits in the system, and the purity o...
Learning Minimal Representations of Many-Body Physics from Snapshots of a Quantum Simulator
Frederik Møller, Gabriel Fernández-Fernández, Thomas Schweigler +3 more·Sep 17, 2025
Analog quantum simulators provide access to many-body dynamics beyond the reach of classical computation. However, extracting physical insights from experimental data is often hindered by measurement noise, limited observables, and incomplete knowled...