Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Systematizing the Interpretation of Quantum Theory via Reconstruction
Philip Goyal·Dec 19, 2025
For a century, quantum theory has posed a fundamental challenge to philosophical thinking. On its face, it repudiates many of the key features of the mechanical conception of physical reality. However, the challenge of developing a precise, coherent ...
Logical gates on Floquet codes via folds and twists
Alexandra E. Moylett, Bhargavi Jonnadula·Dec 19, 2025
Floquet codes have recently emerged as a new family of error-correcting codes, and have drawn significant interest across both theoretical and practical quantum computing. A central open question has been how to implement logical operations on these ...
Visualizing Detection Efficiency in Optomechanical Scattering
Youssef Tawfik, Shan Hao, Thomas P. Purdy·Dec 19, 2025
Many optical measurement techniques, such as light scattering from wavelength-scale particles or detecting motion from a surface with an optical lever, encode information in a complex radiation pattern. Extracting all available information is essenti...
Recasting Schrödinger's Cat Thought Experiment as a Remote Measurement Problem
Lucas L. Brugger, Cristhiano Duarte, Bruno F. Rizzuti·Dec 19, 2025
With 2025 being declared the Year of Quantum Science and Technology, our contribution seeks to provide a fresh perspective on Schrödinger's cat thought experiment. We reinterpret this experiment by viewing it through the lens of quantum theory as a g...
Exploring the Effect of Basis Rotation on NQS Performance
Sven Benjamin Kožić, Vinko Zlatić, Fabio Franchini +1 more·Dec 19, 2025
Neural Quantum States (NQS) use neural networks to represent wavefunctions of quantum many-body systems, but their performance depends on the choice of basis, yet the underlying mechanism remains poorly understood. We use a fully solvable one-dimensi...
Simulation of topological superconductors and their competing orders using photon-mediated interactions
Anjun Chu, Joyce Kwan, Eric Yilun Song +3 more·Dec 19, 2025
Realizing and controlling the unconventional pairing featured by topological superconductors remains a central challenge. We introduce a cavity QED quantum simulator that engineers competing chiral $p_x+ip_y$ and $d_{x^2-y^2}+id_{xy}$ orders by tailo...
A Concept of Two-Point Propagation Field of a Single Photon: A Way to Picometer X-ray Displacement Sensing and Nanometer Resolution 3D X-ray Micro-Tomography
Li Hua Yu·Dec 19, 2025
We introduce the two-point propagation field (TPPF) -- a real-valued, phase-sensitive quantity defined as the functional derivative of the single-photon detection probability with respect to an infinitesimal opaque perturbation placed between source ...
Witnessing Entanglement in Mixed-Particle Quantum Systems
Irma Avdic, David A. Mazziotti·Dec 19, 2025
We introduce an entanglement witness that identifies off-diagonal long-range order (ODLRO) -- a distinctive form of entanglement -- in systems containing both fermionic and bosonic particles. By analyzing the particle-hole reduced density matrices of...
Effective Mass in Dissipative Coupled Polaritons
Diego A. Mendoza, Areli J. Vega-Carmona, Arturo Camacho-Guardian +1 more·Dec 19, 2025
Dissipative coupling refers to the effect where two systems interact with each other mediated by dissipation channels. Recent advances in controlling light-matter systems have opened new avenues to explore non-Hermitian effects arising from dissipati...
Low-loss frequency-tunable Josephson junction array cavities on Ge/SiGe heterostructures with a tapered etching approach
Franco De Palma, Elena Acinapura, Wonjin Jang +5 more·Dec 19, 2025
Ge/SiGe heterostructures represent a promising platform for hosting various quantum devices such as hole spin qubits and Andreev spin qubits. However, the compatibility of such heterostructures with high-quality-factor microwave superconducting cavit...
Quantum Wasserstein distance for Gaussian states
Anaelle Hertz, Mohammad Ahmadpoor, Oleksandr Dzhenzherov +2 more·Dec 19, 2025
Optimal transport between classical probability distributions has been proven useful in areas such as machine learning and random combinatorial optimization. Quantum optimal transport, and the quantum Wasserstein distance as the minimal cost associat...
Momentum correlations of the Hawking effect in a quantum fluid
Marcos Gil de Olivera, Malo Joly, Antonio Z. Khoury +2 more·Dec 19, 2025
The Hawking effect -- the spontaneous emission of correlated quanta from horizons -- can be observed in laboratory systems where an acoustic horizon forms when a fluid transitions from subcritical to supercritical flow. Although most theoretical and ...
Domain-Aware Quantum Circuit for QML
Gurinder Singh, Thaddeus Pellegrini, Kenneth M. Merz,·Dec 19, 2025
Designing parameterized quantum circuits (PQCs) that are expressive, trainable, and robust to hardware noise is a central challenge for quantum machine learning (QML) on noisy intermediate-scale quantum (NISQ) devices. We present a Domain-Aware Quant...
Kerr-induced non-Gaussianity of ultrafast bright squeezed vacuum
Andrei Rasputnyi, Ilya Karuseichyk, Gerd Leuchs +2 more·Dec 19, 2025
Non-Gaussian states of light are a critical resource for fault-tolerant quantum computing and enhanced metrology, but are typically faint and often obtained via post-selection. Here, we demonstrate the deterministic generation of a bright non-Gaussia...
Adiabatic preparation of many-body quantum states: getting the beginning and ending right
Emil T. M. Pedersen, Freek Witteveen, Klaus Mølmer +1 more·Dec 19, 2025
We present numerical calculations, and simulations performed on a Rydberg atom quantum simulator, of the adiabatic evolution of many-body quantum systems around a quantum phase transition. We demonstrate that the end-to-end transfer error, for a give...
Demonstration of a quantum comparator on an ion-trap quantum device
Tatsuhiko N. Ikeda, Riku Nakama, Shunsuke Saeki +4 more·Dec 19, 2025
Quantum computers are believed to solve a class of computational problems that are based on modular arithmetic faster than classical computers. Among the arithmetic building blocks, comparison of integer pairs is a primitive. Here we report its demon...
Proximity effect in asymmetric-gap superconducting bilayers and regularization of transition rates
G. Marchegiani, G. Catelani·Dec 19, 2025
The standard mean-field treatment of low-temperature superconductors leads to a square-root divergent density of states at the gap value. This feature can lead to unphysical logarithmic divergences in various quantities, such as currents and qubit tr...
Continuum Limits of Lazy Open Quantum Walks
Lara Janiurek, Viv Kendon·Dec 19, 2025
We derive the continuous spacetime limit of the one dimensional lazy discrete time quantum walk, obtaining explicit macroscopic evolution equations for a three state model in the presence of decoherence. While continuum limits of two state quantum wa...
Methods and Tools for Secure Quantum Clouds with a specific Case Study on Homomorphic Encryption
Aurelia Kusumastuti, Nikolay Tcholtchev, Philipp Lämmel +2 more·Dec 19, 2025
The rise of quantum computing/technology potentially introduces significant security challenges to cloud computing, necessitating quantum-resistant encryption strategies as well as protection schemes and methods for cloud infrastructures offering qua...
Signatures of coherent energy transfer and exciton delocalization in time-resolved optical cross correlations
Hallmann Óskar Gestsson, Alexandra Olaya-Castro·Dec 19, 2025
We investigate how optical second-order cross correlations witness the quantum features of a prototype donor-acceptor light-harvesting unit. By considering a pair of detuned two-level emitters electronically coupled and incoherently driven to a non-e...