Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Expanding the Neutral Atom Gate Set: Native iSWAP and Exchange Gates from Dipolar Rydberg Interactions
Pedro Ildefonso, Andrew Byun, Aleksei Konovalov +3 more·Dec 4, 2025
We present a native realization of iSWAP and parameterized exchange gates for neutral atom quantum processing units. Our approach leverages strong dipole-dipole interactions between two dipole-coupled Rydberg states, and employs optimal control techn...
Convergence of sample-based quantum diagonalization on a variable-length cuprate chain
L. Andrew Wray, Cheng-Ju Lin, Vincent Su +1 more·Dec 4, 2025
Sample-based quantum diagonalization (SQD) is an algorithm for hybrid quantum-classical molecular simulation that has been of broad interest for application with noisy intermediate scale quantum (NISQ) devices. However, SQD does not always converge o...
Multiphoton interference outperforms pairwise overlaps for distinguishability characterization
S. N. van den Hoven, M. C. Anguita, S. Marzban +1 more·Dec 4, 2025
We propose a protocol that characterizes the pairwise overlaps of the internal modes of single photons more efficiently than pairwise Hong-Ou-Mandel characterization experiments. This protocol exploits multiphoton interference. We experimentally impl...
Mitigating Residual Exchange Coupling in Resonant Singlet-Triplet Qubits
Jiheng Duan, Fernando Torres-Leal, John M. Nichol·Dec 4, 2025
We propose methods to mitigate single- and two-qubit control errors due to residual exchange coupling in systems of exchange-coupled resonant singlet-triplet qubits. Commensurate driving, where the pulse length is an integer multiple of the drive per...
Phase noise characterisation of a 2-km Hollow-Core Nested Antiresonant Nodeless Fibre for Twin-Field Quantum Key Distribution
Mariella Minder, Sophie Albosh, Obada Alia +5 more·Dec 4, 2025
The performance of quantum key distribution (QKD) is heavily dependent on the physical properties of the channel over which it is executed. Propagation losses and perturbations in the encoded photons' degrees of freedom, such as polarisation or phase...
Relative Wavefront Error Correction Over a 2.4 km Free-Space Optical Link via Machine Learning
Nathan K. Long, B. Dix-Matthews, Alexander Frost +4 more·Dec 4, 2025
In coherent optical communication across turbulent atmospheric channels, reference beacons can be multiplexed with information-encoded signals during transmission. In this case, it is commonly assumed that the wavefront distortion of the two is equiv...
Universal Quantum Interconnects via Phase-Coherent Four-Wave Mixing
Hao Zhang, Yang Xu, Linshan Sun +3 more·Dec 3, 2025
Quantum transduction, which enables the coherent conversion of quantum information between disparate physical platforms, is a cornerstone for realizing scalable and interoperable quantum networks. Among various approaches, parametric frequency mixing...
Simulation of a Heterogeneous Quantum Network
Hayden Miller, Caitao Zhan, Michael Bishof +4 more·Dec 3, 2025
Quantum networks are expected to be heterogeneous systems, combining distinct qubit platforms, photon wavelengths, and device timescales to achieve scalable, multiuser connectivity. Building and iterating on such systems is costly and slow, which mot...
Minimizing the Number of Code Switching Operations in Fault-Tolerant Quantum Circuits
Erik Weilandt, Tom Peham, Robert Wille·Dec 3, 2025
Fault-tolerant quantum computers rely on Quantum Error-Correcting Codes (QECCs) to protect information from noise. However, no single error-correcting code supports a fully transversal and therefore fault-tolerant implementation of all gates required...
A contextual advantage for conclusive exclusion: repurposing the Pusey-Barrett-Rudolph construction
Yìlè Yīng, David Schmid, Robert W. Spekkens·Dec 3, 2025
The task of conclusive exclusion for a set of quantum states is to find a measurement such that for each state in the set, there is an outcome that allows one to conclude with certainty that the state in question was not prepared. Defining classicali...
Metrological Sensitivity beyond Gaussian Limits with Cubic Phase States
Jiajie Guo, Shuheng Liu, Boxuan Jing +2 more·Dec 3, 2025
Cubic phase states provide the essential non-Gaussian resource for continuous-variable quantum computing. We show that they also offer significant potential for quantum metrology, surpassing the phase-sensing sensitivity of all Gaussian states at equ...
Sympathetic Cooling of Levitated Optomechanics through Nonreciprocal Coupling
Jialin Li, Guangyu Zhang, Zhang-qi Yin·Dec 3, 2025
Optomechanical cooling of levitated nanoparticles has become an essential topic in modern quantum physics, providing a platform for exploring macroscopic quantum phenomena and high-precision sensing. However, conventional cavity-assisted cooling is f...
Energy-Scaled Zero-Noise Extrapolation for Gottesman-Kitaev-Preskill Code
Gui-Zhong Luo, Matthew Otten·Dec 3, 2025
The performance of Gottesman-Kitaev-Preskill (GKP) codes, an approach to hardware-efficient quantum error correction, is limited by the finite squeezing capabilities of current experimental platforms. To circumvent this hardware demand, we introduce ...
Quantum Hash Function Based on Spectral Properties of Graphs and Discrete Walker Dynamics
Mohana Priya Thinesh Kumar, Pranavishvar Hariprakash·Dec 3, 2025
We present Quantum Graph Hash (QGH-256), a novel quantum spectral hashing algorithm that generates high-entropy fingerprints from message-induced graphs. Each input message is mapped to a weighted graph via a discrete random walk on an n X n toroidal...
Quantum Encrypted Control of Networked Systems
Zihao Ren, Daniel Quevedo, Salah Sukkarieh +1 more·Dec 3, 2025
Encrypted control has been extensively studied to ensure the confidentiality of system states and control inputs for networked control systems. This paper presents a computationally efficient encrypted control framework for networked systems enabled ...
Semantic Temporal Single-photon LiDAR
Fang Li, Tonglin Mu, Shuling Li +11 more·Dec 3, 2025
Temporal single-photon (TSP-) LiDAR presents a promising solution for imaging-free target recognition over long distances with reduced size, cost, and power consumption. However, existing TSP-LiDAR approaches are ineffective in handling open-set scen...
Hybridized-Mode Parametric Amplifier in Kinetic-Inductance Circuits
Danial Davoudi, Abdul Mohamed, Shabir Barzanjeh·Dec 3, 2025
Parametric amplification is essential for quantum measurement, enabling the amplification of weak microwave signals with minimal added noise. While Josephson-junction-based amplifiers have become standard in superconducting quantum circuits, their ma...
Experimental Blueprint for Distinguishing Decoherence from Objective Collapse
Ridha Horchani·Dec 2, 2025
The transition from the quantum to the classical realm remains one of the most profound open questions in physics. While quantum theory predicts the existence of macroscopic superpositions, their apparent absence in the everyday world is attributed e...
Implementation and Analysis of Quantum Majority Rules under Noisy Conditions
Gal Amit, Yuval Idan, Michael Suleymanov +2 more·Dec 2, 2025
Quantum voting, inspired by quantum game theory, provides a framework in which the quantum majority rule (QMR) constitution of Bao and Yunger Halpern [Phys. Rev. A 95, 062306 (2017)] violates the quantum analogue of Arrow's impossibility theorem. We ...
Fault-tolerant quantum computation with constant overhead for general noise
Matthias Christandl, Omar Fawzi, Ashutosh Goswami·Dec 2, 2025
Fault-tolerant quantum computation traditionally incurs substantial resource overhead, with both qubit and time overheads scaling polylogarithmically with the size of the computation. While prior work by Gottesman showed that constant qubit overhead ...