Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Fragment, Entangle, and Consolidate: Strong Correlation through Bi-fold Quantum Circuits
Arpan Choudhury, Sonaldeep Halder, Rahul Maitra +1 more·Oct 17, 2025
An accurate description of strong correlation is quintessential for the exploration of emerging chemical phenomena. While near-term variational quantum algorithms provide a theoretically scalable framework for quantum chemical problems, the accurate ...
High-dimensional Path-Encoded Entanglement Distribution Between Photonic Chips Enabled by Multimode Phase Stabilisation
Molly A. Thomas, Daniel Llewellyn, Patrick W. Yard +13 more·Oct 17, 2025
The reliable distribution of high-dimensional entangled quantum states, an important resource in quantum technologies, through optical fibre networks is challenging due to the need to maintain coherence across multiple modes. Here we demonstrate the ...
Solving the 3D Heat Equation with VQA via Remeshing-Based Warm Starts
Samuel Donachie, Ulysse Remond, Arthur Mathorel +1 more·Oct 17, 2025
Quantum computing holds great promise for solving classically intractable problems such as linear systems and partial differential equations (PDEs). While fully fault-tolerant quantum computers remain out of reach, current noisy intermediate-scale qu...
Distributed Quantum Information Processing: A Review of Recent Progress
Johannes Knörzer, Xiaoyu Liu, Benjamin F. Schiffer +1 more·Oct 17, 2025
Distributed quantum information processing seeks to overcome the scalability limitations of monolithic quantum devices by interconnecting multiple quantum processing nodes via classical and quantum communication. This approach extends the capabilitie...
Time evolution of the Husimi and Glauber-Sudarshan functions in terms of complementary Hamiltonian symbols
Mritunjay Tyagi, Simon Friederich·Oct 17, 2025
We present a compact, systematic formulation of the dynamics of the Husimi Q- and Glauber-Sudarshan P-phase space distribution functions expressed in terms of their \emph{complementary} Hamiltonian symbols: Anti-Wick for Q and Wick for P. The resulti...
Ultracompact Low-Loss Grating Couplers
Shiang-Yu Huang, Jonas Zatsch, Tim Engling +2 more·Oct 17, 2025
Fiber-to-chip couplers play a crucial role in interfacing on-chip photonic circuits with other optical systems or off-chip devices. Downsizing the couplers via topology optimization addresses the demand for high-density integration and improves the s...
A single optically detectable tumbling spin in silicon
Félix Cache, Yoann Baron, Baptiste Lefaucher +9 more·Oct 17, 2025
We demonstrate single spin spectroscopy of a fluorescent tumbling defect in silicon called the G center, behaving as a pseudo-molecule randomly reorienting itself in the crystalline matrix. Using high-resolution spin spectroscopy, we reveal a fine ma...
Elastic Quantum Coupling Between Free Electrons and Photons
Dingguo Zheng, Ofer Kfir·Oct 17, 2025
The quantum coupling between free-electrons and photons enables applying quantum optics techniques in electron microscopy. Here, we formulate the elastic electron-photon quantum coupling and its possible implications. Our analysis shows that when an ...
Benchmarking non-Clifford gates using only Pauli twirling group
Han Ye, Guoding Liu, Xiongfeng Ma·Oct 17, 2025
Quantum gate benchmarking is unavoidably influenced by state preparation and measurement errors. Randomized benchmarking addresses this challenge by employing group twirling to regularize the noise channel, then provides a characterization of quantum...
Parameterized quantum algorithms for closest string problems
Josh Cudby, Sergii Strelchuk·Oct 17, 2025
Parameterized complexity enables the practical solution of generally intractable NP-hard problems when certain parameters are small, making it particularly useful in real-world applications. The study of string problems in this framework has been par...
Photonic Exceptional Points in Holography and QCD
Mahdis Ghodrati·Oct 17, 2025
In this work, based on an analogy with holographic confining geometries and using complexified fields, we build a holographic toy model of third order photonic exceptional points (EPs) of ternary coupled microrings with gain and loss, which makes an ...
Adaptive quantum channel discrimination using methods of quantum metrology
Stanisław Sieniawski, Rafał Demkowicz-Dobrzański·Oct 17, 2025
We present an efficient tensor-network based algorithm for finding the optimal adaptive quantum channel discrimination strategies inspired by recently developed numerical methods in quantum metrology to find the optimal adaptive channel estimation pr...
A Hybrid Quantum Solver for Gaussian Process Regression
Kerem Bükrü, Steffen Leger, M. Lautaro Hickmann +3 more·Oct 17, 2025
Gaussian processes are widely known for their ability to provide probabilistic predictions in supervised machine learning models. Their non-parametric nature and flexibility make them particularly effective for regression tasks. However, training a G...
Fisher discord as a quantifier of quantum complexity
Huihui Li, Shunlong Luo, Yue Zhang·Oct 17, 2025
Two classically equivalent expressions of mutual information of probability distributions (classical bipartite states) diverge when extended to quantum systems, and this difference has been employed to define quantum discord, a quantifier of quantum ...
Entanglement complexification transition driven by a single non-Hermitian impurity
Yao Zhou, Peng Ye·Oct 17, 2025
While non-Hermitian bulk systems and their sensitivity to boundary conditions have been extensively studied, how a non-Hermitian boundary affects the entanglement structure of Hermitian critical systems remains largely unexplored. Here we present a f...
Generalized Boundary Conditions for the qBounce Experiment
Eric J. Sung, Benjamin Koch, Tobias Jenke +2 more·Oct 17, 2025
Discrepancies between theory and recent qBounce data have prompted renewed scrutiny of how boundary conditions are implemented for ultracold neutrons bouncing above a mirror in Earth's gravity. We apply the theory of self-adjoint extensions to the li...
Singularity-free dynamical invariants-based quantum control
Ritik Sareen, Akram Youssry, Alberto Peruzzo·Oct 17, 2025
State preparation is a cornerstone of quantum technologies, underpinning applications in computation, communication, and sensing. Its importance becomes even more pronounced in non-Markovian open quantum systems, where environmental memory and model ...
Achieving Sub-Exponential Speedup in Gate-Based Quantum Computing for Quadratic Unconstrained Binary Optimization
Tseng Ying-Wei, Kao Yu-Ting, Chang Yeong-Jar +2 more·Oct 17, 2025
Recent quantum-inspired methods based on the Simulated Annealing (SA) algorithm have shown strong potential for solving combinatorial optimization problems. However, Grover's algorithm [1] in gate-based quantum computing offers only a quadratic speed...
Capturing Protein Free Energy Landscape using Efficient Quantum Encoding
Ashwini Kannan, Jaya Vasavi Pamidimukkala, Avinash Dakshinamoorthy +3 more·Oct 17, 2025
Protein folding is one of the age-old biological problems that refers to the mechanism of understanding and predicting how a protein's linear sequence of amino acids folds into its specific three dimensional structure.This structure is critical, as a...
Investigating the performance of RPM JTWPAs by optimizing LC-resonator elements
M. A. Gali Labarias, T. Yamada, Y. Nakashima +2 more·Oct 17, 2025
Resonant phase-matched Josephson traveling-wave parametric amplifiers (RPM JTWPAs) play a key role in quantum computing and quantum information applications due to their low-noise, broadband amplification, and quadrature squeezing capabilities. This ...