Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Physically natural metric-measure Lindbladian ensembles and their learning hardness
Caisheng Cheng, Ruicheng Bao·Jan 5, 2026
In open quantum systems, a basic question at the interface of quantum information, statistical physics, and many-body dynamics is how well can one infer the structure of noise and dissipation generators from finite-time measurement statistics alone. ...
Entropy and Variance Squeezing of V-type Atom in Dissipative Cavity
Zijin Liang, Qiying Pan, Hong-Mei Zou +1 more·Jan 4, 2026
Based on Ref.\cite{Riccardi A}, we investigate the entropy and variance squeezing of a V-type atom in a dissipative cavity, and discuss the influences of parameters including the spontaneously generated interference (SGI) ($θ$), the cavity-environmen...
Noise-Resilient Heisenberg-limited Quantum Sensing via Indefinite-Causal-Order Error Correction
Hang Xu, Xiaoyang Deng, Ze Zheng +2 more·Jan 4, 2026
Quantum resources can, in principle, enable Heisenberg-limited (HL) sensing, yet no-go theorems imply that HL scaling is generically unattainable in realistic noisy devices. While quantum error correction (QEC) can suppress noise, its use in quantum ...
Distant Entanglement Generation between Magnon and Superconducting Qubits in Magnon-Mediated Hybrid Systems
Guosen Liu, Pei Pei·Jan 4, 2026
We propose an efficient two-stage protocol for generating distant entanglement in a magnon-mediated hybrid quantum system, where magnons serve dual roles as both interaction mediators and qubits. This integrated design reduces the physical component ...
Silicon-on-sapphire metasurfaces generate arrays of dark and bright traps for neutral atoms
Chengyu Fang, Minjeong Kim, Hongyan Mei +10 more·Jan 3, 2026
We demonstrated crystalline silicon-on-sapphire (c-SOS) metasurfaces that convert a Gaussian beam into arrays of complex optical traps, including arrays of optical bottle beams that trap atoms in dark regions interleaved with bright tweezer arrays. T...
A System Architecture for Low Latency Multiprogramming Quantum Computing
Yilun Zhao, Yu Chen, Kaiyan Chang +4 more·Jan 3, 2026
As quantum systems scale, Multiprogramming Quantum Computing (MPQC) becomes essential to improve device utilization and throughput. However, current MPQC pipelines rely on expensive online compilation to co-optimize concurrently running programs, bec...
Improved decoding algorithms for surface codes under independent bit-flip and phase-flip errors
Louay Bazzi·Jan 2, 2026
We study exact decoding for the toric code and for planar and rotated surface codes under the standard independent \(X/Z\) noise model, focusing on Separate Minimum Weight (SMW) decoding and Separate Most Likely Coset (SMLC) decoding. For the SMW dec...
Geometric Complexity of Quantum Channels via Unitary Dilations
Alberto Acevedo, Antonio Falcó·Jan 2, 2026
Nielsen's geometric approach to quantum circuit complexity provides a Riemannian framework for quantifying the cost of implementing unitary (closed--system) dynamics. For open dynamics, however, the reduced evolution is described by quantum channels ...
Ultracold Quantum Gravimeters: An Introduction for Geophysicists
Ivaldevingles Rodrigues De Souza Junior, Andrea Trombettoni, Carla Braitenberg·Jan 2, 2026
This paper aims at providing an accessible introduction to ultracold quantum gravimeters tailored for geophysicists. We do not focus here on geophysical applications, as these are already well known to geophysicists, but rather provide a pedagogical ...
$Δ_T$ Noise from Electron-Hole Asymmetry in Normal and Superconducting Quantum Point Contacts
Sachiraj Mishra, Colin Benjamin·Jan 1, 2026
This work examines $Δ_T$ noise in two-terminal hybrid nanostructures featuring a quantum point contact (QPC), realized either between two normal metals (NQN) or between a normal metal and a superconductor (NQS). The inclusion of a QPC breaks electron...
Toward $\textit{Ab Initio}$ Quantum Simulations of Atomic Nuclei Using Noisy Qubits
Chongji Jiang, Junchen Pei, R. Hu +4 more·Jan 1, 2026
Quantum computers are expected to provide a ultimate solver for quantum many-body systems, although it is a tremendous challenge to achieve that goal on current noisy quantum devices. This work illustrated quantum simulations of ab initio no-core she...
GEQIE Framework for Rapid Quantum Image Encoding
Rafał Potempa, Michał Kordasz, Józef P. Cyran +2 more·Dec 31, 2025
This work presents a Python framework named after the General Equation of Quantum Image Encoding (GEQIE). The framework creates the image-encoding state using a unitary gate, which can later be transpiled to target quantum backends. The benchmarking ...
Laser intracavity absorption magnetometry for optical quantum sensing
J. M. Wollenberg, F. Perona, A. Palaci +6 more·Dec 31, 2025
Intracavity absorption spectroscopy (ICAS) is a well-established technique for detecting weak absorption signals with ultrahigh sensitivity. Here, we extend this concept to magnetometry using nitrogen-vacancy (NV) centers in diamond. We introduce las...
Towards autonomous time-calibration of large quantum-dot devices: Detection, real-time feedback, and noise spectroscopy
Anantha S. Rao, Barnaby van Straaten, Valentin John +8 more·Dec 31, 2025
The performance and scalability of semiconductor quantum-dot (QD) qubits are limited by electrostatic drift and charge noise that shift operating points and destabilize qubit parameters. As systems expand to large one- and two-dimensional arrays, man...
Quantumness of hybrid systems under quantum noise
M. Abdellaoui, N. -E. Abouelkhir, A. Slaoui +2 more·Dec 31, 2025
We investigate the quantum correlations in an axially symmetric hybrid qubit-qutrit system subjected to different noisy environments. We first introduce a physical model and analyze its Hamiltonian structure, emphasizing the role of hybrid dimensiona...
Entanglement dynamics of multi-fluxonium-qubits under Non-Markovian TLS noise
Chenghong Ji, Chaoying Zhao·Dec 31, 2025
The research on open quantum systems is important for both quantum computing and quantum sensing. So far, we can only use the main equation to make an approximate description. The dynamics of a single Fluxonium qubit under Markovian environment satis...
Continuous-variable quantum key distribution network based on entangled states of optical frequency combs
Hai Zhong, Qianqian Hu, Zhiyue Zuo +3 more·Dec 31, 2025
Continuous-variable quantum key distribution (CVQKD) features a high key rate and compatibility with classical optical communication. Developing expandable and efficient CVQKD networks will promote the deployment of large-scale quantum communication ...
Three-Axis Spin Squeezed States Associated with Excited-State Quantum Phase Transitions
Chon-Fai Kam·Dec 30, 2025
Spin squeezing in collective atomic ensembles enables quantum-enhanced metrology by reducing noise below the standard quantum limit through nonlinear interactions. Extending the one-axis and two-axis twisting paradigms of Kitagawa and Ueda, we introd...
A Quantum-Inspired Algorithm for Graph Isomorphism
Innes L. Maxwell, Stefan N. van den Hoven, Jelmer J. Renema·Dec 30, 2025
The Noisy Intermediate-Scale Quantum (NISQ) era of technology in which we currently find ourselves is defined by non-universality, susceptibility to errors and noise, and a search for useful applications. While demonstrations of practical quantum adv...
Machine Learning-Aided Optimal Control of a Qubit Subjected to External Noise
Riccardo Cantone, Shreyasi Mukherjee, Luigi Giannelli +2 more·Dec 30, 2025
We apply a machine-learning-enhanced greybox framework to a quantum optimal control protocol for open quantum systems. Combining a whitebox physical model with a neural-network blackbox trained on synthetic data, the method captures non-Markovian noi...