Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
GHZ-Preserving Gates and Optimized Distillation Circuits
Mingyuan Wang, Guus Avis, Stefan Krastanov·Oct 29, 2025
Greenberger-Horne-Zeilinger (GHZ) states play a central role in quantum computing and communication protocols, as a typical multipartite entanglement resource. This work introduces an efficient enumeration and simulation method for circuits that pres...
Heuristic Quantum Advantage with Peaked Circuits
Hrant Gharibyan, Mohammed Zuhair Mullath, Nicholas E. Sherman +3 more·Oct 29, 2025
We design and demonstrate heuristic quantum advantage with peaked circuits (HQAP circuits) on Quantinuum's System Model H2 quantum processor. Through extensive experimentation with state-of-the-art classical simulation strategies, we identify a clear...
Establishing Baselines for Photonic Quantum Machine Learning: Insights from an Open, Collaborative Initiative
Cassandre Notton, Vassilis Apostolou, Agathe Senellart +28 more·Oct 29, 2025
The Perceval Challenge is an open, reproducible benchmark designed to assess the potential of photonic quantum computing for machine learning. Focusing on a reduced and hardware-feasible version of the MNIST digit classification task or near-term pho...
Nonlinear quantum evolution of a dissipative superconducting qubit
Orion Lee, Qian Cao, Yogesh N. Joglekar +1 more·Oct 29, 2025
Unitary and dissipative models of quantum dynamics are linear maps on the space of states or density matrices. This linearity encodes the superposition principle, a key feature of quantum theory. However, this principle can break down in effective no...
Inverse-free quantum state estimation with Heisenberg scaling
Kean Chen·Oct 29, 2025
In this paper, we present an inverse-free pure quantum state estimation protocol that achieves Heisenberg scaling. Specifically, let $\mathcal{H}\cong \mathbb{C}^d$ be a $d$-dimensional Hilbert space with an orthonormal basis $\{|1\rangle,\ldots,|d\r...
Universal Random Matrix Behavior of a Fermionic Quantum Gas
Maxime Dixmerias, Giuseppe Del Vecchio Del Vecchio, Cyprien Daix +6 more·Oct 29, 2025
The pursuit of universal governing principles is a foundational endeavor in physics, driving breakthroughs from thermodynamics to general relativity and quantum mechanics. In 1951, Wigner introduced the concept of a statistical description of energy ...
Symmetry and Asymmetry in Bosonic Gaussian Systems: A Resource-Theoretic Framework
Nikolaos Koukoulekidis, Iman Marvian·Oct 29, 2025
We study the interplay of symmetries and Gaussianity in bosonic systems, under closed and open dynamics, and develop a resource theory of Gaussian asymmetry. Specifically, we focus on Gaussian symmetry-respecting (covariant) operations, which serve a...
ETH-monotonicity in two-dimensional systems
Nilakash Sorokhaibam, Anjan Daimari·Oct 29, 2025
We study a recently discovered property of many-body quantum chaotic systems called ETH-monotonicity in two-dimensional systems. Our new results further support ETH-monotonicity in these higher dimensional systems. We show that the flattening rate of...
Fast high-fidelity baseband reset of a latched state for quantum dot qubit readout
Piotr Marciniec, M. A. Wolfe, Tyler Kovach +9 more·Oct 29, 2025
A common method for reading out the state of a spin qubit is by latching one logical qubit state, either $|1\rangle$ or $|0\rangle$, onto a different, metastable charge state. Such a latched state can provide a superior charge sensing signal for qubi...
Conformal Blocks in 2d Carrollian/Galilean CFTs and Excited State Entanglement Entropy
Peng-Xiang Hao, Shunta Takahashi·Oct 29, 2025
We advance the study of flat space holography by computing the entanglement entropy of highly excited states in two-dimensional Carrollian/Galilean Conformal Field Theories (C/G CFTs). Our approach is centered on a novel, physically intuitive derivat...
Quantum simulation of actinide chemistry: towards scalable algorithms on trapped ion quantum computers
Kesha Sorathia, Cono Di Paola, Gabriel Greene-Diniz +9 more·Oct 29, 2025
Due to the wide range of technical applications of actinide elements, a thorough understanding of their electronic structure could complement technological improvements in many different areas. Quantum computing could greatly aid in this understandin...
Accurate Leakage Speculation for Quantum Error Correction
Chaithanya Naik Mude, Swamit Tannu·Oct 29, 2025
Quantum Error Correction (QEC) protects qubits against bit- and phase-flip errors in the |0> or |1> subspace, but physical qubits can also leak into higher energy levels (e.g., |2>). Leakage is especially harmful, as it corrupts all subsequent syndro...
Large-scale implementation of quantum subspace expansion with classical shadows
Laurin E. Fischer, Daniel Bultrini, Ivano Tavernelli +1 more·Oct 29, 2025
Quantum subspace expansion (QSE) offers promising avenues to perform spectral calculations on quantum processors but comes with a large measurement overhead. Informationally complete (IC) measurements, such as classical shadows, were recently propose...
Photoelectric detection of single spins in diamond by optically controlled discharge of long-lived trap states
A. C. Ulibarri, D. J. McCloskey, D. Wang +3 more·Oct 29, 2025
Electrical detection methods for solid-state spins are attractive for quantum technologies, being readily chip-scalable and not subject to the small photon budgets of single emitters. However, realising electrical spin readout in wide-bandgap materia...
Engineering Atom-Photon Hybridization with Density-Modulated Atomic Ensembles in Coupled Cavities
Carlos E. Máximo, Romain Bachelard, Tobias Donner·Oct 29, 2025
Radiation-matter hybridization allows atoms to serve as mediators of effective interactions between light modes and, conversely, to interact among themselves via light. Here we exploit the spatial structure of atomic ensembles to control the coupling...
Controlling the Dynamical Evolution of Quantum Coherence and Quantum Correlations in $ e^{+}e^{-} \to Λ\barΛ$ Processes at BESIII
Elhabib Jaloum, Mohamed Amazioug·Oct 29, 2025
Quantum coherence, a cornerstone of quantum mechanics, is of paramount importance for quantum information protocols. However, maintaining coherence in elementary particle systems presents significant challenges. In this work, we investigate quantum c...
Systematic Non-Binary Extension of LDPC-CSS Codes Preserving Orthogonality
Kenta Kasai·Oct 29, 2025
We study finite-field extensions that preserve the same support as the parity-check matrices defining a given binary CSS code. Here, an LDPC-CSS code refers to a CSS code whose parity-check matrices are orthogonal in the sense that each pair of corre...
Transition-Aware Decomposition of Single-Qudit Gates
Denis A. Drozhzhin, Evgeniy O. Kiktenko, Aleksey K. Fedorov +1 more·Oct 29, 2025
Quantum computation with $d$-level quantum systems, also known as qudits, benefits from the possibility to use a richer computational space compared to qubits. However, for an arbitrary qudit-based hardware platform, the issue is that a generic qudit...
Hybrid Quantum-Classical Recurrent Neural Networks
Wenduan Xu·Oct 29, 2025
We present a hybrid quantum-classical recurrent neural network (QRNN) architecture in which the recurrent core is realized as a parametrized quantum circuit (PQC) controlled by a classical feedforward network. The hidden state is the quantum state of...
Charge-Preserving Operations in Quantum Batteries
André H. A. Malavazi, Borhan Ahmadi, Paweł Horodecki +1 more·Oct 29, 2025
Ergotropy provides a fundamental measure of the extractable work from a quantum system and, consequently, of the maximal useful energy, or charge, stored within it. Understanding how this quantity can be manipulated and transformed efficiently is cru...