Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Universal Sensitivity Bound for Thermal Quantum Dynamic Sensing
Rui Zhang, Yang Yang, Wenkui Ding +1 more·Dec 2, 2025
This work unifies the equilibrium and non-equilibrium frameworks of quantum metrology within the context of many-body systems. We investigate dynamic sensing schemes to derive an upper bound on the quantum Fisher information for probe states in therm...
Progress in quantum metrology and applications for optical atomic clocks
Raphael Kaubruegger, Adam M. Kaufman·Dec 1, 2025
Quantum entanglement offers powerful opportunities for enhancing measurement sensitivity beyond classical limits, with optical atomic clocks serving as a leading platform for such advances. This chapter introduces the principles of entanglement-enhan...
Absorption-Based Qubit Estimation in Discrete-Time Quantum Walks
Edgard P. M. Amorim, Lorena R. Cerutti, O. P. de Sá Neto +1 more·Dec 1, 2025
We investigate state estimation in discrete-time quantum walks with a single absorbing boundary. Using a spectral approach, we obtain closed expressions for the escape probability as a function of the coin state and the boundary position, and their c...
Network theory classification of quantum matter based on wave function snapshots
Riccardo Andreoni, Vittorio Vitale, Cristiano Muzzi +3 more·Dec 1, 2025
Quantum computers and simulators offer unparalleled capabilities of probing quantum many-body states, by obtaining snapshots of the many-body wave function via collective projective measurements. The probability distribution obtained by such snapshot...
Scalable Quantum Reversible BCD Adder Architectures with Enhanced Speed and Reduced Quantum Cost for Next-Generation Computing
Negin Mashayekhi, Mohammad Reza Reshadinezhad, Antonio Rubio +1 more·Dec 1, 2025
The quantum and reversible paradigm merges the principles of quantum mechanics and reversible computation to enable information-preserving processing. It supports next-generation computing architectures that provide improved scalability and enhanced ...
Robust hyperentanglement self testing
Yu-Hao Wang, Xing-Fu Wang, Ming-Ming Du +4 more·Dec 1, 2025
Hyperentanglement, which refers to entanglement encoded in two or more independent degrees of freedom (DOFs), is a valuable resource for the future high-capacity quantum network. Certifying hyperentanglement sources work as intended is critical for t...
From Device to Dynamics: An Iterative Architectural Framework for High-Performance Single-Photon Detection at Room Temperature
Hao Shu·Dec 1, 2025
Photon detection is a cornerstone of quantum technology, traditionally regarded as a static device-level operation constrained by the intrinsic physical properties of single-photon detectors (SPDs). Consequently, high-performance detection has been h...
Passive Polarization Stabilization for Practical and Robust Entanglement Distribution
Jin-Woo Kim, Minchul Kim, Jiho Park +1 more·Dec 1, 2025
Quantum entanglement is a key resource in quantum information science, playing an essential role in quantum key distribution (QKD), quantum networks, and distributed quantum computing. However, practical applications require techniques capable of rel...
From Betti Numbers to Persistence Diagrams: A Hybrid Quantum Algorithm for Topological Data Analysis
Dong Liu·Dec 1, 2025
Persistence diagrams serve as a core tool in topological data analysis, playing a crucial role in pathological monitoring, drug discovery, and materials design. However, existing quantum topological algorithms, such as the LGZ algorithm, can only eff...
Nonclassicality Analysis and Entanglement Witnessing in Spin-$1/2$ NMR Systems
Fatemeh Khashami·Nov 30, 2025
We investigate quantum features and non-classical nature of two-spin-$1/2$ NMR systems at thermal equilibrium under external magnetic fields. More specifically, using suitable quantifiers, we analyze quantum coherence, mixedness, and entanglement in ...
Quantum ramp secret sharing from Haar scrambling
Kiran Adhikari·Nov 30, 2025
Quantum information scrambling has emerged as a powerful tool for studying the dynamics of chaotic quantum many-body systems, assessing benchmarking protocols, and even investigating exotic black hole models. During quantum information scrambling, lo...
Information conservation relations for weak measurement and its reversal
Yusef Maleki, Luis D. Zambrano Palma, M. Suhail Zubairy·Nov 30, 2025
We investigate the information distribution among different entities in the weak measurements protocol. Focusing on multilevel, decaying systems under continuous (no-click) monitoring, we derive exact, conservation-type information relations that hol...
Curvature-Aware Optimization of Noisy Variational Quantum Circuits via Weighted Projective Line Geometry
Gunhee Cho, Jessie Wang, Angela Yue·Nov 30, 2025
We develop a differential-geometric framework for variational quantum circuits in which noisy single- and multi-qubit parameter spaces are modeled by weighted projective lines (WPLs). Starting from the pure-state Bloch sphere CP1, we show that realis...
Hybridization of pulse and continuous-wave based optical quantum computation
Tatsuki Sonoyama, Tomoki Sano, Takumi Suzuki +13 more·Nov 29, 2025
We propose a pulse and continuous wave (CW) hybrid architecture of continuous-variable measurement-based optical quantum computation utilizing the strengths of both pulsed and CW light. In this architecture, input and ancillary non-Gaussian quantum s...
Quantum Sensing via Large Spin-Clusters in Solid-State NMR: Optimal coherence order for practical sensing
Conan Alexander, T S Mahesh·Nov 29, 2025
Quantum entanglement has long been recognized as an important resource for quantum sensing. In this work, we demonstrate the use of multiple-quantum solid-state NMR for quantum sensing by creating, manipulating, and detecting large clusters of correl...
Out-of-time correlation functions in single-body systems
Andrew C. Hunt·Nov 29, 2025
In the study of quantum chaos, `out of time ordered correlators' (OTOCs) are commonly used to quantify the rate at which quantum information is scrambled. This rate has been conjectured by Maldecena et al. to obey a universal, temperature dependent b...
Precise computation of universal corner entanglement entropy at 2+1 dimension: From Ising to Gaussian quantum critical points
Ben Lee-Yeung Ngai, Justin Tim-Lok Chau, Junchen Rong +3 more·Nov 29, 2025
Computing the subleading logarithmic term in the entanglement entropy (EE) of (2+1)d quantum many-body systems remains a significant challenge, despite its central role in revealing universal information about quantum states and quantum critical poin...
Quantum Cubature Codes
Yaoling Yang, Andrew Tanggara, Tobias Haug +1 more·Nov 28, 2025
Bosonic codes utilize the infinite-dimensional Hilbert space of harmonic oscillators to encode quantum information, offering a hardware-efficient approach to quantum error correction. Designing these codes requires precise geometric arrangements of q...
Nonstabilizerness Estimation using Graph Neural Networks
Vincenzo Lipardi, Domenica Dibenedetto, Georgios Stamoulis +2 more·Nov 28, 2025
This article proposes a Graph Neural Network (GNN) approach to estimate nonstabilizerness in quantum circuits, measured by the stabilizer Rényi entropy (SRE). Nonstabilizerness is a fundamental resource for quantum advantage, and efficient SRE estima...
An Operational Quantum Information Framework for Experimental Studies on Color Perception
Roberto Leporini, Edoardo Provenzi, Michel Berthier·Nov 28, 2025
Starting from the foundational axiomatization of the perceptual color space initiated by Schrödinger in 1920 and eventually refined by Resnikoff in 1974, Berthier, Provenzi and their collaborators have recently proposed a reformulation of perceptual ...