Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Metabolic quantum limit to the information capacity of magnetoencephalography
E. Gkoudinakis, S. Li, I. K. Kominis·Nov 9, 2025
Magnetoencephalography, the noninvasive measurement of magnetic fields produced by brain activity, utilizes quantum sensors such as superconducting quantum interference devices and atomic magnetometers. Combining the energy resolution limit of magnet...
Magnon-Squeezing-Induced Nonreciprocal Quantum Coherence in a Cavity Magnomechanical System
Abdelkader Hidki, Amjad Sohail, Tesfay Gebremariam Tesfahannes +2 more·Nov 9, 2025
We investigate quantum coherence in a hybrid cavity magnomechanical system incorporating a squeezed-magnon drive. By analyzing the Gaussian quantum coherence of the cavity, magnonic, and mechanical subsystems, as well as the total system coherence, w...
Ultranarrow Bright Single-Photon Emitters in Diamond with Strong Broadband Phonon Decoupling
Swetapadma Sahoo, Péter Udvarhelyi, Jaden Li +6 more·Nov 9, 2025
Single-photon emitters are fundamental building blocks for quantum information processing, communication and sensing. However, unwanted interactions with bulk phonons in their host environment strongly limit their coherence and controllability. We re...
Super-resolution with Fourier measurements
S. A. Wadood, Shaurya Aarav, Kevin Liang +1 more·Nov 8, 2025
Resolving sources beyond the diffraction limit is important in imaging, communications, and metrology. Current image-based methods of super-resolution require phase information (either of the source points or an added filter) and perfect alignment wi...
Quantum Optimal Control of a Lambda System in the Density Matrix Formulation
Julia Cen, Domenico D'Alessandro·Nov 8, 2025
In various physical implementations of quantum information processing, qubits are realized in a Lambda type system configuration as two stable lower energy levels coupled indirectly via an unstable higher energy level, that is, in comparison, a lot m...
Beyond Penrose tensor diagrams with the ZX calculus: Applications to quantum computing, quantum machine learning, condensed matter physics, and quantum gravity
Quanlong Wang, Richard D. P. East, Razin A. Shaikh +3 more·Nov 8, 2025
We introduce the Spin-ZX calculus as an elevation of Penrose's diagrams and associated binor calculus to the level of a formal diagrammatic language. The power of doing so is illustrated by the variety of scientific areas we apply it to: permutationa...
Recovery of optical losses with the Petz recovery map
Jinyan Chen, Minjeong Song, Valerio Scarani·Nov 8, 2025
Optical systems are a main platform for quantum information processing, while a hidden challenge in these systems is information loss due to scattering into unmonitored modes, typically modeled as state-independent beam-splitter interactions. While s...
Self-induced manipulation of biphoton entanglement in topologically distinct modes
Wei-Wei Zhang, Chao Chen, Jizhou Wu·Nov 8, 2025
Biphoton states have shown promising applications in quantum information processing, including quantum communications, quantum metrology, and quantum imaging. The generation and manipulation of biphoton entanglement in topologically distinct modes pa...
Contrasting GHZ and W-state Entanglement Dynamics due to Correlated Markov Noise
Stephen Brockerhoff, Brittany Corn-Agostini·Nov 8, 2025
The ability to preserve multipartite entanglement in noisy environments is central to advancing quantum information processing. In this work, we develop a semiclassical theoretical model of three entangled qubits exposed to local Markov noise environ...
Semi-device-independent randomness certification on discretized continuous-variable platforms
Moisés Alves, Vitor L. Sena, Santiago Zamora +4 more·Nov 7, 2025
Randomness is fundamental for secure communication and information processing. While continuous-variable optical systems offer an attractive platform for this task, certifying genuine quantum randomness in such setups remains challenging. We present ...
Memory effects in repeated uses of quantum channels
Hayden Zammit, Roberto Salazar, Gianluca Valentino +2 more·Nov 7, 2025
Quantum Information Processing (QIP) tasks can be efficiently formulated in terms of quantum dynamical maps, whose formalism is able to provide the appropriate mathematical representation of the evolution of open quantum systems. A key QIP task is qu...
Further improvements to stabilizer simulation theory: classical rewriting of CSS-preserving stabilizer circuits, quadratic form expansions of stabilizer operations, and framed hidden variable models
Vsevolod I. Yashin, Vladimir V. Yatsulevich, Aleksey K. Fedorov +1 more·Nov 7, 2025
Simulation of stabilizer circuits is a well-studied problem in quantum information processing, with a number of highly optimized algorithms available. Yet, we argue that further improvements can arise from the theoretical structure of stabilizer oper...
Trade-off between complexity and energy in quantum phase estimation
Yukuan Tao, Madalin Guta, Gerardo Adesso·Nov 7, 2025
Quantifying the energetic cost of implementing quantum operations is essential for assessing the efficiency and scalability of quantum sensing and information-processing technologies. Here, we introduce a framework for analysing the interplay between...
Generating functions for quantum metric, Berry curvature, and quantum Fisher information matrix
Wei Chen·Nov 7, 2025
We elaborate that the fidelity between two density matrices is a generating function, through which the quantum Fisher information matrix and Christoffel symbol of the first kind in the parameter space can be obtained through derivatives with respect...
Optimization of Information Reconciliation for Decoy-State Quantum Key Distribution over a Satellite Downlink Channel
Thomas Scarinzi, Davide Orsucci, Marco Ferrari +1 more·Nov 7, 2025
Quantum key distribution (QKD) is a cryptographic solution that leverages the properties of quantum mechanics to be resistant and secure even against an attacker with unlimited computational power. Satellite-based links are important in QKD because t...
Bounds on quantum Fisher information and uncertainty relations for thermodynamically conjugate variables
Ye-Ming Meng, Zhe-Yu Shi·Nov 7, 2025
Uncertainty relations represent a foundational principle in quantum mechanics, imposing inherent limits on the precision with which \textit{mechanically} conjugate variables such as position and momentum can be simultaneously determined. This work es...
Spin-Network Quantum Reservoir Computing with Distributed Inputs: The Role of Entanglement
Sareh Askari, Youssef Kora, Christoph Simon·Nov 7, 2025
Reservoir computing is a promising neuromorphic paradigm, and its quantum implementation using spin networks has shown some advantage when entanglement is present. Here, we consider a distributed scenario in which two distinct input time series are i...
Programmable Adiabatic Rapid Passage laser pulses for Ultra-fast Gates on trapped ions
En-Teng An, Hao-Qing Zhang, Yun-Feng Huang +2 more·Nov 7, 2025
Scaling of quantum gates remains a central challenge in quantum information science. Ultrafast gates based on spin-dependent kicks provide a promising approach for trapped-ion systems. However, these gates require laser pulses with both high temporal...
Ballistic bosonic noise suppression with hybrid qumode-qubit rotation gates
Saurabh U. Shringarpure, Siheon Park, Sungjoo Cho +4 more·Nov 7, 2025
Noise suppression is of paramount importance for reliable quantum information processing and computation. We show that for any single-mode bosonic code (qumode) corrupted by thermal~noise at rate~$η$ and mean \mbox{excitation}~$\bar{n}$, a hybrid con...
Real-time magnetic field noise correction using trapped-ion monitor qubits
Kyle DeBry, Agustin Valdes-Martinez, David Reens +2 more·Nov 6, 2025
We demonstrate a trapped-ion protocol in which a nearby, dedicated "monitor" qubit tracks magnetic-field drifts in real time without interrupting data-qubit operations. Using two $^{40}\mathrm{Ca}^+$ ions and the optical--metastable--ground architect...