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Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum coherent dynamics of quasiclassical spacetimes
Sijia Wang, Achintya Sajeendran, Dong-han Yeom +2 more·Nov 25, 2025
In a wide range of quantum gravity theories, quasiclassical geometries, which are solutions to the Einstein field equations approximately, are described by "coherent states." Here we propose a Hamiltonian formalism for gravitational dynamics with res...
Nonreciprocal quantum information processing with superconducting diodes in circuit quantum electrodynamics
Nicolas Dirnegger, Prineha Narang, Arpit Arora·Nov 25, 2025
Introducing new components and functionalities into quantum devices is critical in advancing state-of-the-art hardware. Here, we propose superconducting diodes (SDs) as a coherent nonreciprocal element in circuit quantum electrodynamics (cQED) archit...
Baby universe as logical qubits: information recovery in random encoding
Takato Mori, Beni Yoshida·Nov 25, 2025
We revisit whether a semiclassical closed baby universe in AdS/CFT necessarily possess a trivial one-dimensional Hilbert space or may instead carry a large entropy. Recent results on Haar random encoding suggest a breakdown of complementary recovery,...
Elucidating the Inter-system Crossing of the Nitrogen-Vacancy Center up to Megabar Pressures
Benchen Huang, Srinivas V. Mandyam, Weijie Wu +12 more·Nov 25, 2025
The integration of Nitrogen-Vacancy color centers into diamond anvil cells has opened the door to quantum sensing at megabar pressures. Despite a multitude of experimental demonstrations and applications ranging from quantum materials to geophysics, ...
Routing in Non-Isotonic Quantum Networks
Maxwell Tang, Garrett Hinkley, Kenneth Goodenough +2 more·Nov 25, 2025
Optimal routing in quantum-repeater networks requires finding the best path that connects a pair of end nodes. Most previous work on routing in quantum networks assumes utility functions that are isotonic, meaning that the ordering of two paths does ...
Extracting conserved operators from a projected entangled pair state
Wen-Tao Xu, Miguel Frías Pérez, Mingru Yang·Nov 25, 2025
Given a tensor network state, how can we determine conserved operators (including Hamiltonians) for which the state is an eigenstate? We answer this question by presenting a method to extract geometrically $k$-local conserved operators that have the ...
Asymptotic yet practical optimization of quantum circuits implementing GF($2^m$) multiplication and division operations
Noureldin Yosri, Dmytro Gavinsky, Dmitri Maslov·Nov 25, 2025
We present optimized quantum circuits for GF$(2^m)$ multiplication and division operations, which are essential computing primitives in various quantum algorithms. Our ancilla-free GF multiplication circuit has the gate count complexity of $O(m^{\log...
Quantum Key Distribution: Bridging Theoretical Security Proofs, Practical Attacks, and Error Correction for Quantum-Augmented Networks
Nitin Jha, Abhishek Parakh, Mahadevan Subramaniam·Nov 25, 2025
Quantum Key Distribution (QKD) is revolutionizing cryptography by promising information-theoretic security through the immutable laws of quantum mechanics. Yet, the challenge of transforming these idealized security models into practical, resilient s...
Dynamic local single-shot checks for toric codes
Yingjia Lin, Abhinav Anand, Kenneth R. Brown·Nov 25, 2025
Quantum error correction typically requires repeated syndrome extraction due to measurement noise, which results in substantial time overhead in fault-tolerant computation. Single-shot error correction aims to suppress errors using only one round of ...
Reservoir-Engineered Exceptional Points for Quantum Energy Storage
Borhan Ahmadi, André H. A. Malavazi, Paweł Mazurek +2 more·Nov 25, 2025
Exceptional points are spectral singularities where both eigenvalues and eigenvectors collapse onto a single mode, causing the system behavior to shift abruptly and making it highly responsive to even small perturbations. Although widely studied in o...
Magnetic Control of the Non-Hermitian Skin Effect in Two-Dimensional Lattices
Stefano Longhi·Nov 25, 2025
The non-Hermitian skin effect (NHSE) -- the anomalous boundary accumulation of an extensive number of bulk modes -- has emerged as a hallmark of non-Hermitian physics, with broad implications for transport, sensing, and topological classification. A ...
Closed-Loop Phase-Coherence Compensation for Superconducting Qubits Integrated Computational and Hardware Validation of the Aurora Method
Futoshi Hamanoue·Nov 25, 2025
We present an emulator-based and hardware feasibility study of Aurora-DD, a phase-coherence compensation method that integrates a sign-based feedback update of a global phase offset (Delta phi) with a fixed-depth XY8 dynamical decoupling (DD) scaffol...
Categorical Framework for Quantum-Resistant Zero-Trust AI Security
I. Cherkaoui, C. Clarke, J. Horgan +1 more·Nov 25, 2025
The rapid deployment of AI models necessitates robust, quantum-resistant security, particularly against adversarial threats. Here, we present a novel integration of post-quantum cryptography (PQC) and zero trust architecture (ZTA), formally grounded ...
Triangle Inequality for a Quantum Wasserstein Divergence
Melchior Wirth·Nov 25, 2025
We resolve a conjecture of De Palma and Trevisan by proving the triangle inequality for a quantum 2-Wasserstein distance. The proof relies on complex analysis methods to establish a new integral representation of the cost in the optimal transport pro...
Efficient Estimation of Multiple Temperatures via a Collisional Model
Srijon Ghosh, Sagnik Chakraborty, Rosario Lo Franco·Nov 25, 2025
We present a quantum thermometric protocol for the estimation of multiple temperatures within the collisional model framework. Employing the formalism of multiparameter quantum metrology, we develop a systematic strategy to estimate the temperatures ...
Impact of the valence band on Rydberg excitons in cuprous oxide quantum wells
Niklas Scheuler, Jörg Main, Patric Rommel +3 more·Nov 25, 2025
The complex valence band structure of bulk cuprous oxide necessitates going beyond the parabolic approximation to precisely estimate exciton binding energies. The same is true for excitons in cuprous oxide quantum wells, for which many effects have b...
Fast Quantum Gates for Neutral Atoms Separated by a Few Tens of Micrometers
Matteo Bergonzoni, Rosario Roberto Riso, Guido Pupillo·Nov 25, 2025
We present a theoretical scheme for a family of fast and high-fidelity two-qubit iSWAP gates between neutral atoms separated by more than 20 um, enabled by resonant dipole-dipole spin-exchange interactions between Rydberg states. The protocol harness...
Twin Hamiltonians, three types of the Dyson maps, and the probabilistic interpretation problem in quasi-Hermitian quantum mechanics
Aritra Ghosh, Adam Miranowicz, Miloslav Znojil·Nov 25, 2025
In the framework of the so-called quasi-Hermitian quantum mechanics of stationary unitary systems, bound states are usually constructed as eigenstates $|ψ_n \rangle$ of a Hamiltonian operator $H$ with real spectrum which is non-Hermitian, $H \neq H^\...
Resource assessment of classical and quantum hardware for post-quench dynamics
Joseph Vovrosh, Tiago Mendes-Santos, Hadriel Mamann +6 more·Nov 25, 2025
We estimate the run-time and energy consumption of simulating non-equilibrium dynamics on neutral atom quantum computers in analog mode, directly comparing their performance to state-of-the-art classical methods, namely Matrix Product States and Neur...
Quantum coherence measures in entangled atomic systems
Arnab Mukherjee, Soham Sen, Sunandan Gangopadhyay·Nov 25, 2025
In this study, we investigate the effect of the Lorentz transformation on the measures of quantum coherence in an entangled atomic system. Here, we consider the effect of this relativistic boosts on two-particle entangled generalized Gaussian wave pa...