Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Probing phase transitions in non-Hermitian systems with quantum entanglement
Ling-Feng Zhang, Wing Chi Yu·Sep 30, 2025
We study the quantum entanglement and quantum phase transition of the non-Hermitian anisotropic spin-$\frac{1}{2}$ XY model and XXZ model with the staggered imaginary field by analytical methods and numerical exact diagonalization, respectively. Vari...
Unitary synthesis with fewer T gates
Xinyu Tan·Sep 30, 2025
We present a simple algorithm that implements an arbitrary $n$-qubit unitary operator using a Clifford+T circuit with T-count $O(2^{4n/3} n^{2/3})$. This improves upon the previous best known upper bound of $O(2^{3n/2} n)$, while the best known lower...
Layerwise Federated Learning for Heterogeneous Quantum Clients using Quorus
Jason Han, Nicholas S. DiBrita, Daniel Leeds +3 more·Sep 30, 2025
Quantum machine learning (QML) holds the promise to solve classically intractable problems, but, as critical data can be fragmented across private clients, there is a need for distributed QML in a quantum federated learning (QFL) format. However, the...
Encoder Circuit Optimization for Non-Binary Quantum Error Correction Codes in Prime Dimensions: An Algorithmic Framework
Aditya Sodhani, Keshab K. Parhi·Sep 29, 2025
Quantum computers are a revolutionary class of computational platforms with applications in combinatorial and global optimization, machine learning, and other domains involving computationally hard problems. While these machines typically operate on ...
Quantum heuristics for linear optimization over large separable operators
Ankith Mohan, Tobias Haug, Kishor Bharti +1 more·Sep 29, 2025
Optimizing over separable quantum objects is challenging for two key reasons: determining separability is NP-hard, and the dimensionality of the problem grows exponentially with the number of qubits. We address both challenges by introducing a heuris...
Modeling amortization systems with vector spaces
Juan Sebastian Ardenghi·Sep 29, 2025
Amortization systems are used widely in economy to generate payment schedules to repaid an initial debt with its interest. We present a generalization of these amortization systems by introducing the mathematical formalism of quantum mechanics based ...
Single-particle Fraunhofer diffraction in a classical pilot-wave model
David Darrow, John W. M. Bush·Sep 29, 2025
Walking oil droplets offer a qualitative, classical analog of single-particle diffraction. Making this analog quantitative has proven challenging, leading recent authors to conjecture that no classical pilot-wave model could exhibit Fraunhofer diffra...
Toward a Complexity Classification of High-Temperature Bosons: Computational Tractability and Power-Law Clustering
Xin-Hai Tong, Tomotaka Kuwahara·Sep 29, 2025
Determining when quantum many-body systems admit simple, efficiently simulable structure is a central problem. High-temperature thermal states are a natural candidate for such simplicity, yet for bosons, the unbounded local Hilbert space and energy i...
High fidelity CNOT gates in photonic integrated circuits using composite segmented directional couplers
Jonatan Piasetzky, Amit Rotem, Yuval Warshavsky +4 more·Sep 29, 2025
Integrated photonic circuits are a promising platform for scalable quantum information processing, but their performance is often constrained by component sensitivity to fabrication imperfections. Directional couplers, which are crucial building bloc...
Experimental demonstration of boson sampling as a hardware accelerator for monte carlo integration
Malaquias Correa Anguita, Teun Roelink, Sara Marzban +3 more·Sep 29, 2025
We present an experimental demonstration of boson sampling as a hardware accelerator for Monte Carlo integration. Our approach leverages importance sampling to factorize an integrand into a distribution that can be sampled using quantum hardware and ...
Barnett Effect-Induced Nonreciprocal Entanglement and Gaussian interferometric power in Magnomechanics with Optical Parametric Amplifier
Noura Chabar, M. Amghar, Shakir Ullah +5 more·Sep 29, 2025
Nonreciprocity is a powerful tool in quantum technologies. It allows signals to be sent in one direction but not the other. In this article, we propose a method for achieving non-reciprocal entanglement and Gaussian interferometric power (GIP) via th...
Heisenberg Scaling in a Continuous-Wave Interferometer
Hudson A. Loughlin, Melissa A. Guidry, Jacques Ding +7 more·Sep 29, 2025
Continuous-wave (CW) interferometry has stood at the frontier of precision measurement science since its inception, where it was used to search for the luminiferous ether, to the present day, where it forms the basis of interferometric gravitational-...
Magnetometry with Broadband Microwave Fields in Nitrogen-Vacancy Centers in Diamond
Arezoo Afshar, Andrew Proppe, Noah Lupu-Gladstein +3 more·Sep 29, 2025
Nitrogen vacancy (NV) centers in diamond are optically addressable and versatile light-matter interfaces with practical application in magnetic field sensing, offering the ability to operate at room temperature and reach sensitivities below pT/$\sqrt...
Fast quantum computation with all-to-all Hamiltonians
Chao Yin·Sep 29, 2025
All-to-all interactions arise naturally in many areas of theoretical physics and across diverse experimental quantum platforms, motivating a systematic study of their information-processing power. Assuming each pair of qubits interacts with $\mathrm{...
Quantum process tomography of a compressed time evolution circuit on superconducting quantum processors
Maria Dinca, David J. Luitz, Maxime Debertolis·Sep 29, 2025
As present day quantum hardware is limited by various noise mechanisms, quantum advantage can only be reached in the near-term by designing noise-resilient quantum algorithms. In this work, we employ state-of-the-art quantum process tomography (QPT) ...
Renormalization of Chern-Simons Wilson Loops via Flux Quantization in Cohomotopy
Hisham Sati, Urs Schreiber·Sep 29, 2025
In the practice of physics model building, the process of renormalization, resummation, and anomaly cancellation is to incrementally repair initially ill-defined Lagrangian quantum field theories. Impressive as this is, one would rather have concisel...
Krylov Winding and Emergent Coherence in Operator Growth Dynamics
Rishik Perugu, Bryce Kobrin, Michael O. Flynn +1 more·Sep 29, 2025
The operator wavefunction provides a fine-grained description of quantum chaos and of the irreversible growth of simple operators into increasingly complex ones. Remarkably, at finite temperature this wavefunction can acquire a phase that increases l...
Generalized Wigner theorem for non-invertible symmetries
Gerardo Ortiz, Chinmay Giridhar, Philipp Vojta +2 more·Sep 29, 2025
We establish the conditions under which a conservation law associated with a non-invertible operator may be realized as a symmetry in quantum physics. As established by Wigner, all quantum symmetries must be represented by either unitary or antiunita...
Error detection without post-selection in adaptive quantum circuits
Eli Chertkov, Andrew C. Potter, David Hayes +1 more·Sep 29, 2025
Current quantum computers are limited by errors, but have not yet achieved the scale required to benefit from active error correction in large computations. We show how simulations of open quantum systems can benefit from error detection. In particul...
Complexity of Einstein-Maxwell-non-minimal coupling $R^2F^2$: the role of the penalty factor
Mojtaba Shahbazi, Mehdi Sadeghi·Sep 29, 2025
We investigate holographic complexity in Einstein-Maxwell theory with a non-minimal coupling of the form $R^2F_{μν}F^{μν}$ within the complexity=anything framework. A perturbative AdS black brane solution is constructed to first order in the non-mini...