Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Fault Injection Attacks on Machine Learning-based Quantum Computer Readout Error Correction
Anthony Etim, Jakub Szefer·Dec 23, 2025
Machine-learning (ML) classifiers are increasingly used in quantum computing systems to improve multi-qubit readout discrimination and to mitigate correlated readout errors. These ML classifiers are an integral component of today's quantum computer's...
Markov Chain Model of Entanglement Setup in Noisy Dynamic LEO Satellite Networks
Yifan Gao, Alvin Valera, Winston K. G. Seah·Dec 23, 2025
Quantum entanglement routing in dynamic Low Earth Orbit (LEO) satellite networks is important for achieving scalable and high-fidelity quantum communication. However, the dynamic characteristics of satellite network topology, limited quantum resource...
$\mathscr{H}_2$ Model Reduction for Augmented Model of Linear Non-Markovian Quantum Systems
Guangpu Wu, Shibei Xue, Guofeng Zhang +3 more·Dec 23, 2025
An augmented system model provides an effective way to model non-Markovian quantum systems, which is useful in filtering and control for this class of systems. However, since a large number of ancillary quantum oscillators representing internal modes...
Experimental Efficient Source-Independent Quantum Conference Key Agreement
Wen-Ji Hua, Yi-Ran Xiao, Yu Bao +2 more·Dec 23, 2025
Multipartite entanglement enables secure group key distribution among multiple users while providing immunity against hacking attacks targeting source devices, thereby realizing source-independent quantum conference key agreement (SI-QCKA). However, ...
Bell-Inequality Violation for Continuous, Non-Projective Measurements
Shalender Singh, Santosh Kumar·Dec 23, 2025
Many solid-state quantum platforms do not permit sharp, projective measurements but instead yield continuous voltage or field traces under weak, non-demolition readout. In such systems, standard Bell tests based on dichotomic projective measurements ...
Regression of Functions by Quantum Neural Networks Circuits
Fernando M. de Paula Neto, Lucas dos Reis Silva, Paulo S. G. de Mattos Neto +1 more·Dec 23, 2025
The performance of quantum neural network models depends strongly on architectural decisions, including circuit depth, placement of parametrized operations, and data-encoding strategies. Selecting an effective architecture is challenging and closely ...
Real Matrix Representations of Quantum Operators: An Introduction to Quantum Index Algebra
A. Yu. Volkov, G. A. Koroteev, Yu. S. Volkov·Dec 23, 2025
We introduce Quantum Index Algebra (QIA) as a finite, index-based algebraic framework for representing and manipulating quantum operators on Hilbert spaces of dimension $2^m$. In QIA, operators are expressed as structured combinations of basis elemen...
Solving Segment Display Problems Using Quantum Grover's Search Algorithm
Shanyan Chen, Ali Al-Bayaty, Xiaoyu Song +1 more·Dec 23, 2025
This paper introduces a new Boolean-based methodology for constructing Segment Display Problems (SDPs) in the quantum domain and solving them using Grover's quantum search algorithm. In the classical domain, the SDPs are typically solved using variou...
Nonclassicality of Mixed States with Photon Number Coherence
Spencer Rogers, Salman Shahid, Wenchao Ge·Dec 23, 2025
The operational resource theory (ORT) measure is a nonclassicality measure for bosonic states, notable for its resource-theoretic properties and connection to metrology. However, it can be difficult to evaluate, being linked to an optimization proble...
Post-Quantum Cryptography in the 5G Core
T. Attema, Bor de Kock, S. Jayaprakash +3 more·Dec 23, 2025
In this work, the conventional cryptographic algorithms used in the 5G Core are replaced with post-quantum alternatives and the practical impact of this transition is evaluated. Using a simulation environment, we model the registration and deregistra...
Controlled pairing symmetries in a Fermi-Hubbard ladder with band flattening
J. P. Mendonça, S. Biswas, M. Dziurawiec +6 more·Dec 22, 2025
Band flattening has been identified as key ingredient to correlation phenomena in Moiré materials and beyond. Here, we examine strongly repulsive fermions on a ladder -- a minimal platform for unconventional $d$-wave pairing -- and show that flatteni...
An introduction to monitored quantum systems and quantum trajectories: spectrum, typicality, and phases
Ryusuke Hamazaki, Ken Mochizuki, Hisanori Oshima +1 more·Dec 22, 2025
Thanks to recent experimental advances in simulating and detecting quantum dynamics with high precision and controllability, our understanding of the physics of monitored quantum systems has considerably deepened over the past decades. In this articl...
Analytical blueprint for 99.999% fidelity X-gates on present superconducting hardware under strong driving
José Diogo Da Costa Jesus, Boxi Li, Yuan Gao +3 more·Dec 22, 2025
Achieving very fast gates that undercut the natural limits set by decoherence requires going into the strong driving limit. Realizing single-qubit control predicted beyond semi-classical, time-dependent modeling has yet to be experimentally realized ...
DC-powered broadband quantum-limited microwave amplifier
N. Nehra, N. Bourlet, A. H. Esmaeili +7 more·Dec 22, 2025
Fast, high-fidelity, single-shot readout of superconducting qubits in quantum processors demands quantum-limited amplifiers to preserve the optimal signal-to-noise ratio. Typically, quantum-limited amplification is achieved with parametric down-conve...
Gate-Based Microwave Quantum Repeater Via Grid-State Encoding
Hany Khalifa, Matti Silveri·Dec 22, 2025
In autonomous quantum error correction the lifetime of a logical bosonic qubit can be extended beyond its physical constituents without feedback measurements. Leveraging autonomous error correction, we propose a second-generation gate-based microwave...
Efficient Learning of Lattice Gauge Theories with Fermions
Shreya Shukla, Yukari Yamauchi, Andrey Y. Lokhov +2 more·Dec 22, 2025
We introduce a learning method for recovering action parameters in lattice field theories. Our method is based on the minimization of a convex loss function constructed using the Schwinger-Dyson relations. We show that score matching, a popular learn...
Entanglement cohomology for GHZ and W states
Christian Ferko, Keiichiro Furuya·Dec 22, 2025
Entanglement cohomology assigns a graded cohomology ring to a multipartite pure state, providing homological invariants that are stable under local unitaries and characterize inequivalent patterns of entanglement. In this work we derive exact express...
Generalized coherent states in thermal field dynamics in the frame of diagonal ordering operator technique
Dušan Popov·Dec 22, 2025
Although the thermofield dynamics (TFD) was developed specifically for systems to which the ladder canonical operators and are associated, in the paper we showed that this approach can also be formulated for systems of deformed bosons, associated wit...
Dissipative quantum algorithms for excited-state quantum chemistry
Hao-En Li, Lin Lin·Dec 22, 2025
Electronic excited states are central to a vast array of physical and chemical phenomena, yet accurate and efficient methods for preparing them on quantum devices remain challenging and comparatively underexplored. We introduce a general dissipative ...
The relation between classical and quantum Lyapunov exponent and the bound on chaos in classically chaotic quantum systems
Fabian Haneder, Gerrit Caspari, Juan Diego Urbina +1 more·Dec 22, 2025
Out-of-Time-Ordered Commutators (OTOCs), representing a key diagnostic for scrambling as a facet of short-time quantum chaos, have attracted wide-ranging interest, from many-body physics to quantum gravity. By means of a suitable form of the Wigner-M...