Papers
Live trends in quantum computing research, updated daily from arXiv.
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A Novel Approach to Explainable AI with Quantized Active Ingredients in Decision Making
A. M. A. S. D. Alagiyawanna, Asoka Karunananda, Thushari Silva +1 more·Jan 13, 2026
Artificial Intelligence (AI) systems have shown good success at classifying. However, the lack of explainability is a true and significant challenge, especially in high-stakes domains, such as health and finance, where understanding is paramount. We ...
Rational degree is polynomially related to degree
Robin Kothari, Matt Kovacs-Deak, Daochen Wang +1 more·Jan 13, 2026
We prove that $\mathrm{deg}(f) \leq \widetilde{O}(\mathrm{rdeg}(f)^3)$ for every Boolean function $f$, where $\mathrm{deg}(f)$ is the degree of $f$ and $\mathrm{rdeg}(f)$ is the rational degree of $f$. This resolves the second of the three open probl...
Kernel Learning for Regression via Quantum Annealing Based Spectral Sampling
Yasushi Hasegawa, Masayuki Ohzeki·Jan 13, 2026
While quantum annealing (QA) has been developed for combinatorial optimization, practical QA devices operate at finite temperature and under noise, and their outputs can be regarded as stochastic samples close to a Gibbs--Boltzmann distribution. In t...
Superadditivity of Krylov Complexity for Tensor Products
Jeff Murugan, Hendrik J. R. van Zyl·Jan 13, 2026
We study Krylov complexity for quantum systems whose Hamiltonians factorise as tensor products. We prove that complexity is superadditive under tensor products, $C_{12}\ge C_1+C_2$, and identify a positive operator that quantifies the resulting exces...
Fragility of Optimal Measurements due to Noise in Probe States for Quantum Sensing
Andrew Kolmer Forbes, Marco A. Rodríguez-García, Ivan H. Deutsch·Jan 13, 2026
For a given quantum state used in sensing, the quantum Cramér-Rao bound (QCRB) sets a fundamental limit on the precision achievable by an unbiased estimator of an unknown parameter, determined by the inverse of the quantum Fisher information (QFI). T...
Data Product MCP: Chat with your Enterprise Data
Marco Tonnarelli, Filippo Scaramuzza, Simon Harrer +1 more·Jan 13, 2026
Computational data governance aims to make the enforcement of governance policies and legal obligations more efficient and reliable. Recent advances in natural language processing and agentic AI offer ways to improve how organizations share and use d...
On equivalent methods for functional determinants
Matthias Carosi·Jan 13, 2026
Computing functional determinants of differential operators is central to any field-theoretical calculation relying on a saddle-point expansion. A variety of approaches is available for the computation that avoid having to know the eigenspectrum of t...
Attosecond quantum optics
Mohamed Sennary, Javier Rivera-Dean, Yihe Wange +2 more·Jan 13, 2026
Modern quantum optics primarily operates in the quasistationary regime, isolated from the intrinsic timescales of ultrafast optical fields. Pushing these boundaries into the femtosecond and attosecond domains is a critical frontier. Here, we generate...
From Classical to Quantum Reinforcement Learning and Its Applications in Quantum Control: A Beginner's Tutorial
Abhijit Sen, Sonali Panda, Mahima Arya +3 more·Jan 13, 2026
This tutorial is designed to make reinforcement learning (RL) more accessible to undergraduate students by offering clear, example-driven explanations. It focuses on bridging the gap between RL theory and practical coding applications, addressing com...
Non-uniform modal power distribution caused by disorder in multimode fibers
Mario Zitelli·Jan 13, 2026
The evolution of modal crosstalk in multimode fibers is investigated using four different experimental and numerical approaches. Results converge to demonstrate that the fiber disorder alone is capable of generating steady states characterized by non...
Quantum CSS LDPC Codes based on Dyadic Matrices for Belief Propagation-based Decoding
Alessio Baldelli, Massimo Battaglioni, Jonathan Mandelbaum +2 more·Jan 13, 2026
Quantum low-density parity-check (QLDPC) codes provide a practical balance between error-correction capability and implementation complexity in quantum error correction (QEC). In this paper, we propose an algebraic construction based on dyadic matric...
Parameterized families of 2+1d $G$-cluster states
Shuhei Ohyama, Kansei Inamura·Jan 13, 2026
We construct a $G$-cluster Hamiltonian in 2+1 dimensions and analyze its properties. This model exhibits a $G\times2\mathrm{Rep}(G)$ symmetry, where the $2\mathrm{Rep}(G)$ sector realizes a non-invertible symmetry obtained by condensing appropriate a...
Generalized cluster states in 2+1d: non-invertible symmetries, interfaces, and parameterized families
Kansei Inamura, Shuhei Ohyama·Jan 13, 2026
We construct 2+1-dimensional lattice models of symmetry-protected topological (SPT) phases with non-invertible symmetries and investigate their properties using tensor networks. These models, which we refer to as generalized cluster models, are const...
Open quantum spin chains with non-reciprocity: a theoretical approach based on the time-dependent generalized Gibbs ensemble
Alice Marché, Hironobu Yoshida, Alberto Nardin +2 more·Jan 13, 2026
We study an open quantum spin chain with non-reciprocal dissipation using a theoretical approach known as time-dependent generalized Gibbs ensemble. In the regime of weak dissipation the system is fully characterized by its rapidity distribution and ...
Sample Complexity of Composite Quantum Hypothesis Testing
Jacob Paul Simpson, Efstratios Palias, Sharu Theresa Jose·Jan 13, 2026
This paper investigates symmetric composite binary quantum hypothesis testing (QHT), where the goal is to determine which of two uncertainty sets contains an unknown quantum state. While asymptotic error exponents for this problem are well-studied, t...
Entanglement-swapping measurements for deterministic entanglement distribution
Mir Alimuddin, Jaemin Kim, Antonio Acín +1 more·Jan 13, 2026
Entanglement swapping is a key primitive for distributing entanglement across nodes in quantum networks. In standard protocols, the outcome of the intermediate measurement determines the resulting state, making the process inherently probabilistic an...
Phase-sensitive superposition of quantum states
Xiaotong Wang, Shunlong Luo, Yue Zhang·Jan 13, 2026
Although the principle of superposition lies at the heart of quantum mechanics and is the root of almost all quantum phenomena such as coherence and entanglement, its quantification, except for that related to the resource theory of coherence and int...
Quantum Computing -- Strategic Recommendations for the Industry
Marvin Erdmann, Lukas Karch, Abhishek Awasthi +9 more·Jan 13, 2026
This whitepaper surveys the current landscape and short- to mid-term prospects for quantum-enabled optimization and machine learning use cases in industrial settings. Grounded in the QCHALLenge program, it synthesizes hardware trajectories from diffe...
Asymptotically good CSS codes that realize the logical transversal Clifford group fault-tolerantly
K. Sai Mineesh Reddy, Navin Kashyap·Jan 13, 2026
This paper introduces a framework for constructing Calderbank-Shor-Steane (CSS) codes that support fault-tolerant logical transversal $Z$-rotations. Using this framework, we obtain asymptotically good CSS codes that fault-tolerantly realize the logic...
Nonclassicality of multi-photon-added cat states
Jhordan Santiago, Petr Steindl·Jan 13, 2026
Multi-photon-added cat states are constructed by repeatedly applying the creation operator to a cat state. We study in detail their photon-number distribution, $Q$ parameter, squeezing properties, and Wigner function. We show that photon addition ind...