Papers
Live trends in quantum computing research, updated daily from arXiv.
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Quantum State Preparation of Ferromagnetic Magnons by Parametric Driving
Monika E. Mycroft, Rostyslav O. Serha, Andrii V. Chumak +1 more·Jan 19, 2026
We propose a method to prepare and certify Gaussian quantum states of the ferromagnetic resonance spin-wave modes in ferromagnets using a longitudinal drive. Contrary to quantum optics-based strategies, our approach harnesses a purely magnonic featur...
Revealing the non-classicality of a molecular nanomagnet
Alessandra Cammarata, Steve Campbell, Mauro Paternostro·Jan 19, 2026
Molecular nanomagnets are compounds characterized by a high-spin magnetic core that is protected by organic ligands. They have recently gained attention as potential quantum information carriers in solid-state quantum computing platforms, simultaneou...
Connecting Magic Dynamics in Thermofield Double States to Spectral Form Factors
Ning Sun, Pengfei Zhang·Jan 19, 2026
Under unitary evolution, chaotic quantum systems initialized in simple states rapidly develop high complexity, precluding any efficient classical description. Quantum chaos is traditionally characterized by spectral properties of the Hamiltonian, mos...
Constructing the Hamiltonian for a free 1D KFGM particle in an interval
Techapon Kampu, Salvatore De Vincenzo·Jan 19, 2026
We analyze the problem of a free 1D Klein-Fock-Gordon-Majorana (KFGM) particle in an interval. By free, we mean that there is no potential within the interval and that its walls are penetrable; hence, the pertinent energy current density does not van...
Learning at the Edge of Causality: Optimal Learning-Sample Complexity from No-Signaling Constraints
Jeongho Bang, Kyoungho Cho, Jeongwoo Jae·Jan 19, 2026
What ultimately fixes the sample cost of quantum learning -- algorithmic ingenuity or physical law? We study this question in an arena where computation, learning, and causality collide. A twist on Grover's search that reflects about an a priori unkn...
Equation-Free Discovery of Open Quantum Systems via Paraconsistent Neural Networks
Aleyna Ceyran, Jair Minoro Abe·Jan 19, 2026
Modeling the dynamics of open quantum systems on noisy intermediate-scale quantum (NISQ) devices constitutes a major challenge, as high noise levels and environmental degradations lead to the decay of pure quantum states (decoherence) and energy loss...
Interpolation of unitaries with time-dependent Hamiltonians via Deep Learning
Antonio Guerra, Daniel Uzcategui-Contreras, Aldo Delgado +1 more·Jan 18, 2026
Quantum systems governed by time-dependent Hamiltonians pose significant challenges for the accurate computation of unitary time-evolution operators, which are essential for predicting quantum state dynamics. In this work, we introduce a physics-info...
Quantum Filtering for Squeezed Noise Inputs
John Gough, Dylon Rees·Jan 18, 2026
We derive the quantum filter for a quantum open system undergoing quadrature measurements (homodyning) where the input field is in a general quasi-free state. This extends previous work for thermal input noise and allows for squeezed inputs. We intro...
Artificial Intelligence in Materials Science and Engineering: Current Landscape, Key Challenges, and Future Trajectorie
Iman Peivaste, Salim Belouettar, Francesco Mercuri +15 more·Jan 18, 2026
Artificial Intelligence is rapidly transforming materials science and engineering, offering powerful tools to navigate complexity, accelerate discovery, and optimize material design in ways previously unattainable. Driven by the accelerating pace of ...
Coherence Scaling in Quantum Communication Protocols
Pedro H. Alvarez, Marcos C. de Oliveira·Jan 18, 2026
We investigate how quantum coherence scales and is redistributed in quantum communication protocols, using superdense coding and quantum teleportation as paradigmatic case studies. Employing the relative entropy of coherence as a circuit-level resour...
AlphaSyndrome: Tackling the Syndrome Measurement Circuit Scheduling Problem for QEC Codes
Yuhao Liu, Shuohao Ping, Junyu Zhou +8 more·Jan 18, 2026
Quantum error correction (QEC) is essential for scalable quantum computing, yet repeated syndrome-measurement cycles dominate its spacetime and hardware cost. Although stabilizers commute and admit many valid execution orders, different schedules ind...
Novel method for evaluating the eigenvalues of the Heun differential equation with an application to the Breit equation
P. J. Rijken, Th. A. Rijken·Jan 18, 2026
Eigenvalues of the Breit equation, in which only the static Coulomb potential is considered, have been found. Over the past decades several authors have analyzed the Breit equation to obtain numerically or by approximation an estimation of the energy...
Semidefinite Programming for Quantum Channel Learning
Mikhail Gennadievich Belov, Victor Victorovich Dubov, Vadim Konstantinovich Ivanov +3 more·Jan 18, 2026
The problem of reconstructing a quantum channel from a sample of classical data is considered. When the total fidelity can be represented as a ratio of two quadratic forms (e.g., in the case of mapping a mixed state to a pure state, projective operat...
Non-intersecting Squared Bessel Process: Spectral Moments and Dynamical Entanglement Entropy
Youyi Huang, Lu Wei·Jan 18, 2026
Statistical ensembles of reduced density matrices of bipartite quantum systems play a central role in entanglement estimation, but do not capture the non-stationary nature of entanglement relevant to realistic quantum information processing. To addre...
A Mixture of Experts Vision Transformer for High-Fidelity Surface Code Decoding
Hoang Viet Nguyen, Manh Hung Nguyen, Hoang Ta +2 more·Jan 18, 2026
Quantum error correction is a key ingredient for large scale quantum computation, protecting logical information from physical noise by encoding it into many physical qubits. Topological stabilizer codes are particularly appealing due to their geomet...
Stochastic Quantum Information Geometry and Speed Limits at the Trajectory Level
Pedro B. Melo, Pedro V. Paraguassú, Sílvio M. Duarte Queirós +3 more·Jan 18, 2026
Standard quantum metrology relies on ensemble-averaged quantities, such as the Quantum Fisher Information (QFI), which often mask the fluctuations inherent to single-shot realizations. In this work, we bridge the gap between quantum information geome...
Operator delocalization in disordered spin chains via exact MPO marginals
Jonnathan Pineda, Mario Collura, Gianluca Passarelli +3 more·Jan 18, 2026
We investigate operator delocalization in disordered one-dimensional spin chains by introducing -- besides the already known operator mass -- a complementary measure of operator complexity: the operator length. Like the operator nonstabilizerness, bo...
Topological quantum color code model on infinite lattice
Shiyu Cao, Zhian Jia, Sheng Tan·Jan 18, 2026
The color code model is a crucial instance of a Calderbank--Shor--Steane (CSS)-type topological quantum error-correcting code, which notably supports transversal implementation of the full Clifford group. Its robustness against local noise is rooted ...
Efficient classical simulation of time dynamics in Fermi-Hubbard models with imaginary interactions
Raul A. Santos·Jan 18, 2026
Using a map between the Lindbladian evolution of dephasing in free fermions and the time evolution of imaginary-interaction Fermi-Hubbard models in bipartite lattices, we present an efficient classical algorithm to solve the Schrödinger equation in t...
Disentanglement by deranking and by suppression of correlation
Eyal Buks·Jan 18, 2026
The spontaneous disentanglement hypothesis is motivated by some outstanding issues in standard quantum mechanics, including the problem of quantum measurement. The current study compares between some possible methods that can be used to implement the...