Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Error-detectable Universal Control for High-Gain Bosonic Quantum Error Correction
Weizhou Cai, Zi-Jie Chen, Ming Li +5 more·Jan 29, 2026
Protecting quantum information through quantum error correction (QEC) is a cornerstone of future fault-tolerant quantum computation. However, current QEC-protected logical qubits have only achieved coherence times about twice those of their best phys...
Schroedinger's principle eliminates the EPR-locality paradox
Walter F. Wreszinski·Jan 29, 2026
We introduce a principle, implicitly contained in Schroedinger's paper (Schr35), which allows a proof of the non-existence of the EPR-locality paradox in the Copenhagen interpretation of quantum mechanics. The paradox is shown to be well-posed alread...
A geometric criterion for optimal measurements in multiparameter quantum metrology
Jing Yang, Satoya Imai, Luca Pezzè·Jan 29, 2026
Determining when the multiparameter quantum Cramér--Rao bound (QCRB) is saturable with experimentally relevant single-copy measurements is a central open problem in quantum metrology. Here we establish an equivalence between QCRB saturation and the s...
Quantum LEGO Learning: A Modular Design Principle for Hybrid Artificial Intelligence
Jun Qi, Chao-Han Huck Yang, Pin-Yu Chen +3 more·Jan 29, 2026
Hybrid quantum-classical learning models increasingly integrate neural networks with variational quantum circuits (VQCs) to exploit complementary inductive biases. However, many existing approaches rely on tightly coupled architectures or task-specif...
Quantum Random Features: A Spectral Framework for Quantum Machine Learning
Akitada Sakurai, Aoi Hayashi, William John Munro +1 more·Jan 29, 2026
Quantum machine learning (QML) models often require deep, parameterized circuits to capture complex frequency components, limiting their scalability and near-term implementation. We introduce \textit{Quantum Random Features} (QRF) and \textit{Quantum...
Hierarchical quantum decoders
Nirupam Basak, Ankith Mohan, Andrew Tanggara +3 more·Jan 29, 2026
Decoders are a critical component of fault-tolerant quantum computing. They must identify errors based on syndrome measurements to correct quantum states. While finding the optimal correction is NP-hard and thus extremely difficult, approximate decod...
Reinforcement Learning for Adaptive Composition of Quantum Circuit Optimisation Passes
Daniel Mills, Ifan Williams, Jacob Swain +3 more·Jan 29, 2026
Many quantum software development kits provide a suite of circuit optimisation passes. These passes have been highly optimised and tested in isolation. However, the order in which they are applied is left to the user, or else defined in general-purpo...
Non-invertible translation from Lieb-Schultz-Mattis anomaly
Tsubasa Oishi, Takuma Saito, Hiromi Ebisu·Jan 29, 2026
Symmetry provides powerful non-perturbative constraints in quantum many-body systems. A prominent example is the Lieb-Schultz-Mattis (LSM) anomaly -- a mixed 't Hooft anomaly between internal and translational symmetries that forbids a trivial symmet...
A biased-erasure cavity qubit with hardware-efficient quantum error detection
Jiasheng Mai, Qiyu Liu, Xiaowei Deng +8 more·Jan 29, 2026
Erasure qubits are beneficial for quantum error correction due to their relaxed threshold requirements. While dual-rail erasure qubits have been demonstrated with a strong error hierarchy in circuit quantum electrodynamics, biased-erasure qubits -- w...
Holographic Entanglement Propagation Through Wormholes
Kazuki Doi, Liang Li, Ung Nguyen +1 more·Jan 29, 2026
We study how energy and quantum entanglement are transferred when two identical CFTs are entangled locally. This is probed by considering a local operator insertion in one of the CFTs. When the CFTs have holographic duals via the AdS/CFT corresponden...
Non-secular polariton leakage and dark-state protection in hybrid plasmonic cavities
Marco Vallone·Jan 29, 2026
A major issue in exploiting plasmonic cavities as key components in nanotechnology is the effect of radiative and absorption losses on their electrodynamic behavior. Treating them as open-systems, we derive a time-local, completely positive master eq...
Practical Evaluation of Quantum Kernel Methods for Radar Micro-Doppler Classification on Noisy Intermediate-Scale Quantum (NISQ) Hardware
Vikas Agnihotri, Jasleen Kaur, Sarvagya Kaushik·Jan 29, 2026
This paper examines the application of a Quantum Support Vector Machine (QSVM) for radarbased aerial target classification using micro-Doppler signatures. Classical features are extracted and reduced via Principal Component Analysis (PCA) to enable e...
Entanglement of quantum systems via a classical mediator in hybrid van Hove theory
Sebastian Ulbricht, Andrés Darío Bermúdez Manjarres, Marcel Reginatto·Jan 29, 2026
It is a matter of ongoing discussion whether quantum states can become entangled while only interacting via a classical mediator. This lively debate is deeply interwoven with the question of whether entanglement studies can prove the quantum nature o...
Strassen's support functionals coincide with the quantum functionals
Keiya Sakabe, Mahmut Levent Doğan, Michael Walter·Jan 29, 2026
Strassen's asymptotic spectrum offers a framework for analyzing the complexity of tensors. It has found applications in diverse areas, from computer science to additive combinatorics and quantum information. A long-standing open problem, dating back ...
Quantum Otto cycle in the Anderson impurity model
Salvatore Gatto, Alessandra Colla, Heinz-Peter Breuer +1 more·Jan 29, 2026
We study the thermodynamic performance of a periodic quantum Otto cycle operating on the single-impurity Anderson model. Using a decomposition of the time-evolution generator based on the principle of minimal dissipation, combined with the numericall...
Cooperative Emission from Quantum Emitters in Hexagonal Boron Nitride Layers
Igor Khanonkin, Amir Sivan, Le Liu +5 more·Jan 29, 2026
Collective light emission from many-body quantum systems is a cornerstone of quantum optics, yet its implementation in solid-state platforms operating under ambient conditions remains highly challenging. Large-bandgap van der Waals materials such as ...
High-Coherence and High-frequency Quantum Computing: The Design of a High-Frequency, High-Coherence and Scalable Quantum Computing Architecture
Masroor H. S. Bukhari·Jan 29, 2026
High-coherence, fault-tolerant and scalable quantum computing architectures with unprecedented long coherence times, faster gates, low losses and low bit-flip errors may be one of the only ways forward to achieve the true quantum advantage. In this c...
Transversal gates for quantum CSS codes
Eduardo Camps-Moreno, Hiram H. López, Gretchen L. Matthews +2 more·Jan 29, 2026
In this paper, we focus on the problem of computing the set of diagonal transversal gates fixing a CSS code. We determine the logical actions of the gates as well as the groups of transversal gates that induce non-trivial logical gates and logical id...
Quantum Simulation with Fluxonium Qutrit Arrays
Ivan Amelio, Quentin Ficheux, Nathan Goldman·Jan 29, 2026
Fluxonium superconducting circuits were originally proposed to realize highly coherent qubits. In this work, we explore how these circuits can be used to implement and harness qutrits, by tuning their energy levels and matrix elements via an external...
RF-free driving of nuclear spins with color centers in silicon carbide
Raphael Wörnle, Jonathan Körber, Timo Steidl +5 more·Jan 29, 2026
Color centers that enable nuclear-spin control without RF fields offer a powerful route towards simplified and scalable quantum devices. Such capabilities are especially valuable for quantum sensing and computing platforms that already find applicati...