Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
String Diagrams for Defect-Based Surface Code Computing
Mateusz Kupper, D. Horsman, C. Heunen +1 more·Aug 20, 2025
Surface codes are a popular choice for implementing fault-tolerant quantum computing. Two-qubit gates may be realised in these codes using only nearest-neighbour interactions, either by lattice surgery or by braiding defects around each other. The ef...
Stochastic Modeling of a Memory-Assisted Measurement-Device-Independent Quantum Key Distribution System in Free-Space Metropolitan Environments
Fares Nada, Amber Hussain, Tasmi R. Ahmed +1 more·Aug 20, 2025
On the pathway to quantum key distribution on a global scale, will be the realization of metropolitan-sized Memory Assisted Measurement-Device-Independent Quantum Key Distribution (MA-MDI-QKD) systems. Here, we present a simplistic and intuitive stoc...
Logical Error Rates for the Surface Code Under a Mixed Coherent and Stochastic Circuit-Level Noise Model Inspired by Trapped Ions
Tyler LeBlond, Peter Groszkowski, Justin G. Lietz +2 more·Aug 19, 2025
With fault-tolerant quantum computing (FTQC) on the horizon, it is critical to understand sources of logical error in plausible hardware implementations of quantum error-correcting codes (QECC). In this work, we consider logical error rates for the s...
Flag at origin: a modular fault-tolerant preparation for CSS codes
Diego Forlivesi, David Amaro·Aug 19, 2025
Fault-tolerant (FT) preparation of diverse logical stabilizer states in quantum error-correcting (QEC) codes is essential for FT computation. Existing constructions of these FT circuits are often constrained by classical computational resources or re...
Analog computation with transcriptional networks
David Doty, Mina Latifi, David Soloveichick·Aug 19, 2025
Transcriptional networks represent one of the most extensively studied types of systems in synthetic biology. Although the completeness of transcriptional networks for digital logic is well-established, *analog* computation plays a crucial role in bi...
Brace for impact: ECDLP challenges for quantum cryptanalysis
Pierre-Luc Dallaire-Demers, William Doyle, Timothy Foo·Aug 19, 2025
Precise suites of benchmarks are required to assess the progress of early fault-tolerant quantum computers at economically impactful applications such as cryptanalysis. Appropriate challenges exist for factoring but those for elliptic curve cryptogra...
Entanglement witnesses for stabilizer states and subspaces beyond qubits
Jakub Szczepaniak, Owidiusz Makuta, Remigiusz Augusiak·Aug 19, 2025
Genuine multipartite entanglement is arguably the most valuable form of entanglement in the multipartite case, with applications, for instance, in quantum metrology. In order to detect that form of entanglement in multipartite quantum states, one typ...
Many-Body Anti-Zeno Thermalization and Zeno Determinism in Monitored Hamiltonian Dynamics
Jia-Jin Feng, Quntao Zhuang·Aug 19, 2025
Random quantum states are essential for quantum information science, with applications ranging from quantum computing to cryptography. Prior approaches for generating these states often rely on using a large bath to thermalize a smaller system, with ...
Asymptotic freedom in the dephased charging of quantum batteries
Chayan Purkait, B. Prasanna Venkatesh, Gentaro Watanabe·Aug 19, 2025
Quantum batteries, small-scale energy storage devices based on quantum systems, offer the potential for enhanced charging performance through quantum effects such as coherence and collectivity. In this work, we study the collective charging of quantu...
Noise-Resilient Spatial Search with Lackadaisical Quantum Walks
Gabriel Mauricio Oswald Vieira, Nelson Maculan, Franklin de Lima Marquezino·Aug 19, 2025
Quantum walks are a powerful framework for the development of quantum algorithms, with lackadaisical quantum walks (LQWs) standing out as an efficient model for spatial search. In this work, we investigate how broken-link decoherence affects the perf...
Schrödingerization for quantum linear systems problems with near-optimal dependence on matrix queries
Yin Yang, Yue Yu, Long Zhang·Aug 19, 2025
We develop a quantum algorithm for linear algebraic equations $ A\bb{x} = \bb{b} $ from the perspective of Schrödingerization-form problems, which are characterized by a system of linear convection equations in one higher dimension. When $ A $ is pos...
Multiclass portfolio optimization via variational quantum Eigensolver with Dicke state ansatz
J. Scursulim, G. Langeloh, Victor Leme Beltran +1 more·Aug 19, 2025
Combinatorial optimization is a fundamental challenge in various domains, with portfolio optimization standing out as a key application in finance. Despite numerous quantum algorithmic approaches proposed for this problem, most overlook a critical fe...
Quantum Sampling and Moment Estimation for Transformed Gaussian Random Fields
Matthias Deiml, Daniel Peterseim·Aug 19, 2025
We present a quantum algorithm for efficiently sampling transformed Gaussian random fields on $d$-dimensional domains, based on an enhanced version of the classical moving average method. Pointwise transformations enforcing boundedness are essential ...
Guided sampling ans\"atzes for variational quantum computing
D. Gunlycke, John P. T. Stenger, A. Maksymov +3 more·Aug 19, 2025
Quantum computing is a promising technology because of the ability of quantum computers to process vector spaces with dimensions that increase exponentially with the simulated system size. Extracting the solution, however, is challenging as the numbe...
PennyLane-Lightning MPI: A massively scalable quantum circuit simulator based on distributed computing in CPU clusters
J. Kang, Hoon Ryu·Aug 19, 2025
Quantum circuit simulations play a critical role in bridging the gap between theoretical quantum algorithms and their practical realization on physical quantum hardware, yet they face computational challenges due to the exponential growth of quantum ...
Adversarially Robust Quantum State Learning and Testing
M. Aliakbarpour, Vladimir Braverman, Nai-Hui Chia +1 more·Aug 19, 2025
Quantum state learning is a fundamental problem in physics and computer science. As near-term quantum devices are error-prone, it is important to design error-resistant algorithms. Apart from device errors, other unexpected factors could also affect ...
Quantum-Inspired Artificial Bee Colony for Latency-Aware Task Offloading in IoV
Mamta Kumari, Mayukh Sarkar, Rohit Kumar Nonia·Aug 19, 2025
Efficient task offloading is crucial for reducing latency and ensuring timely decision-making in intelligent transportation systems within the rapidly evolving Internet of Vehicles (IoV) landscape. This paper introduces a novel Quantum-Inspired Artif...
Portfolio Construction using a Sampling-Based Variational Quantum Scheme
Gabriele Agliardi, Dimitris Alevras, Vaibhaw Kumar +5 more·Aug 19, 2025
The efficient and effective construction of portfolios that adhere to real-world constraints is a challenging optimization task in finance. We investigate a concrete representation of the problem with a focus on design proposals of an Exchange Traded...
Callan-Symanzik-like equation in information theory
Mojtaba Shahbazi, Mehdi Sadeghi·Aug 18, 2025
Within the "complexity=anything" proposal of holography, the complexity growth rate (CGR) can exhibit jumps, interpreted as phase transitions. We demonstrate that the location and amplitude of these jumps are governed by the dynamics of bulk fields, ...
Quantum Walk on a Line with Absorbing Boundaries
Ammara Ammara, Václav Potoček, Martin Štefaňák +1 more·Aug 18, 2025
Absorption of two-state coined quantum walks on a finite line with two sinks located at $N$ and $-N$ is investigated. Elaborating on the results of Konno et al., J. Phys. A: Math. Gen. 36 241 (2003), we derive closed formulas for the absorption proba...