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Live trends in quantum computing research, updated daily from arXiv.
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Pure-State Quantum Tomography with Minimal Rank-One POVMs
Dan Edidin, Ivan Gonzalez, Itzhak Tamo·Nov 12, 2025
Quantum state tomography seeks to reconstruct an unknown state from measurement statistics. A finite measurement (POVM) is \emph{pure-state informationally complete} (PSI-Complete) if the outcome probabilities determine any pure state up to a global ...
Picturing general quantum subsystems
Octave Mestoudjian, Matt Wilson, Augustin Vanrietvelde +1 more·Nov 12, 2025
We extend the usual process-theoretic view on locality and causality in subsystems (based on the tensor product case) to general quantum systems (i.e.\ possibly non-factor, finite-dimensional von Neumann algebras). To do so, we introduce a primitive ...
Adaptive Estimation of Drifting Noise in Quantum Error Correction
Devansh Bhardwaj, Evangelia Takou, Yingjia Lin +1 more·Nov 12, 2025
Advancing quantum information processors and building fault-tolerant architectures rely on the ability to accurately characterize the noise sources and suppress their impact on quantum devices. In practice, noise often drifts over time, whereas conve...
Physics-Informed Neural Networks for Gate Design using Quantum Optimal Control
Sofiia Lauten, Matthew Otten·Nov 12, 2025
Implementing quantum gates on quantum computers can require the application of carefully shaped pulses for high-fidelity operations. We explore the use of physics-informed neural networks (PINNs) for quantum optimal control to assess their usefulness...
Shorter width truncated Taylor series for Hamiltonian dynamics simulations
Michelle Wynne Sze, David Zsolt Manrique, David Muñoz Ramo +1 more·Nov 12, 2025
As established in the seminal work by Berry et al.[1], expanding the time evolution operator using truncated Taylor series (up to some order $K$) makes a good candidate for simulating Hamiltonian dynamics. Here, we adapt the method but present an alt...
Interferometric Braiding of Anyons in Chern Insulators
Felix A. Palm, Nader Mostaan, Nathan Goldman +1 more·Nov 12, 2025
Coherent control and braiding of anyons remain central challenges in realizing topologically protected quantum operations. We propose a Ramsey interferometry protocol to directly access the geometric phases associated with anyons in fractional Chern ...
A hybrid variational quantum circuit approach for stabilizer states classifiers
Hamna Aslam, Frédéric Holweck·Nov 12, 2025
Entanglement classification of pure multipartite quantum states is a challenging problem in quantum information theory that can be mathematically stated as orbit classification for some given group action on the ambient Hilbert space. The group actio...
Noise-Induced Equalization in quantum learning models
Francesco Scala, Giacomo Guarnieri, Aurelien Lucchi·Nov 12, 2025
Quantum noise is known to strongly affect quantum computation, thus potentially limiting the performance of currently available quantum processing units. Even learning models based on variational quantum algorithms, which were designed to cope with t...
Weight-based measure of quantum memory as a universal and operational benchmark
Jinghang Zhang, Yu Luo·Nov 12, 2025
Quantum memory plays a critical role in quantum communication, sensing, and computation. However, studies on quantum memory under a unified benchmarking framework remain scarce. In this paper, we propose a weight-based quantifier as a benchmarking me...
Family of two-parameter multipartite entanglement measures
Yu Luo, Zhihua Guo, Fanxu Meng +1 more·Nov 12, 2025
Multipartite entanglement is regarded as a crucial physical resource in quantum network communication. However, due to the intrinsic complexity of quantum many-body systems, identifying a multipartite entanglement measure that is both efficiently com...
Bridging Classical and Quantum Worlds: Maps, States, and Evolutions
D. Amato, P. Facchi, G. Marmo·Nov 12, 2025
In this work, we present several aspects of the interplay between classical and quantum theories. After reviewing the equivalence between positivity and complete positivity in the commutative setting, we introduce and analyze intermediate notions tha...
Experimental loopback boson sampling
Yu. A. Biriukov, R. D. Morozov, K. I. Okhlopkov +15 more·Nov 12, 2025
We present an experimental demonstration of boson sampling enhanced by optical feedback lines, a novel approach that introduces temporal correlations among photons to amplify computational complexity. We utilize a 25-mode femtosecond laser-written in...
Thermodynamic uncertainty relations for relativistic quantum thermal machines
Dimitris Moustos, Obinna Abah·Nov 12, 2025
We investigate a two-qubit SWAP thermal machine -- a streamlined analogue of the four-stroke Otto cycle -- whose working medium comprises inertially moving Unruh-DeWitt qubit detectors, each coupled to a thermal quantum field bath prepared at a diffe...
Quantum Meet-in-the-Middle Attacks on Key-Length Extension Constructions
Min Liang, Ruihao Gao, Jiali Wu·Nov 12, 2025
Key-length extension (KLE) techniques provide a general approach to enhancing the security of block ciphers by using longer keys. There are mainly two classes of KLE techniques, cascade encryption and XOR-cascade encryption. This paper presents sever...
Influence of Modulation Frequency Stabilization on Spectral Noise of Electromagnetically Induced Transparency
Hou Jinghua, Su Nan, Liu Yao +3 more·Nov 12, 2025
The conversion of the modulation signal from the coupling light to the probe light and the conversion of the additional phase noise from the coupling light to the amplitude noise of the probe light in the electromagnetically induced transparency (EIT...
Quantum Frustration as a Protection Mechanism in Non-Topological Majorana Qubits
E. Novais·Nov 12, 2025
I analyze the decoherence of a $π$-junction qubit encoded by two co-located Majorana modes. Although not topologically protected, the qubit leverages distinct spatial profiles to couple to two independent environmental baths, realizing the phenomenon...
Correlated Quantum Airy Photons: An Analytical Approach
V. Sau, R. Giustozzi, P. Piergentili +4 more·Nov 12, 2025
We describe the generation of correlated photon pairs by means of spontaneous parametric down-conversion of an optical pump in the form of a finite energy Airy beam. The optical system function, which contributes to the propagation of the down-conver...
Efficient and Noise-Resilient Molecular Quantum Simulation with the Generalized Superfast Encoding
James Brown, Tarini S Hardikar, Kenny Heitritter +1 more·Nov 12, 2025
Simulating molecular systems on quantum computers requires efficient mappings from Fermionic operators to qubit operators. Traditional mappings such as Jordan-Wigner or Bravyi-Kitaev often produce high-weight Pauli terms, increasing circuit depth and...
Classical Optimization Strategies for Variational Quantum Algorithms: A Systematic Study of Noise Effects and Parameter Efficiency
Tomáš Bezděk, Haomu Yuan, Vojtěch Novák +2 more·Nov 12, 2025
This study systematically benchmarks classical optimization strategies for the Quantum Approximate Optimization Algorithm when applied to Generalized Mean-Variance Problems under near-term Noisy Intermediate-Scale Quantum conditions. We evaluate Dual...
Infinite-component $BF$ field theory: Connection of fracton order, Toeplitz braiding, and non-Hermitian amplification
Bo-Xi Li, Peng Ye·Nov 12, 2025
Building on the infinite-component Chern--Simons theory of three-dimensional fracton phases by Ma et al. [Phys. Rev. B 105, 195124 (2022)] and the Toeplitz braiding of anyons by Li et al.~[Phys. Rev B 110, 205108 (2024)], we show that stacking $(3+1)...