Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum key-recovery attacks on FBC algorithm
Yanying Zhu, Bin-Bin Cai, Fei Gao +1 more·Aug 1, 2025
With the advancement of quantum computing, symmetric cryptography faces new challenges from quantum attacks. These attacks are typically classified into two models: Q1 (classical queries) and Q2 (quantum superposition queries). In this context, we pr...
Nonclassical microwave radiation from the parametric dynamical Casimir effect in the reversed-dissipation regime of circuit optomechanics
H. Solki, A. Motazedifard, M. Naderi +2 more·Aug 1, 2025
We propose an experimentally feasible optomechanical system (OMS) that is dispersively driven and operates in the reversed dissipation regime (RDR), where the mechanical damping rate far exceeds the cavity decay rate. We demonstrate that coherent, fa...
Evaluating Angle and Amplitude Encoding Strategies for Variational Quantum Machine Learning: their impact on model's accuracy
A. Tudisco, Andrea Marchesin, Maurizio Zamboni +2 more·Aug 1, 2025
Recent advancements in Quantum Computing and Machine Learning have increased attention to Quantum Machine Learning (QML), which aims to develop machine learning models by exploiting the quantum computing paradigm. One of the widely used models in thi...
Truncation uncertainties for accurate quantum simulations of lattice gauge theories
Anthony N. Ciavarella, Siddharth Hariprakash, Jad C. Halimeh +1 more·Jul 31, 2025
The encoding of lattice gauge theories onto quantum computers requires a discretization of the gauge field's Hilbert space on each link, which presents errors with respect to the Kogut--Susskind limit. In the electric basis, Hilbert space fragmentati...
Amplitude amplification and estimation require inverses
Ewin Tang, John Wright·Jul 31, 2025
We prove that the generic quantum speedups for brute-force search and counting only hold when the process we apply them to can be efficiently inverted. The algorithms speeding up these problems, amplitude amplification and amplitude estimation, assum...
Quantum scarring enhances non-Markovianity of subsystem dynamics
Aditya Banerjee·Jul 31, 2025
Given that any subsystem of a closed out-of-equilibrium quantum system is an open quantum system, its dynamics (reduced from the full system's unitary evolution) can be either Markovian (memory-less) or non-Markovian, with the latter necessarily impe...
Swap Network Augmented Ansätze on Arbitrary Connectivity
Teodor Parella-Dilmé, Jakob S. Kottmann, Antonio Acín·Jul 31, 2025
Efficient parametrizations of quantum states are essential for trainable hybrid classical-quantum algorithms. A key challenge in their design consists in adapting to the available qubit connectivity of the quantum processor, which limits the capacity...
Squeezed gravitons from superradiant axion fields around rotating black holes
Panagiotis Dorlis, Nick E. Mavromatos, Sarben Sarkar +1 more·Jul 31, 2025
We propose, in (3+1)-dimensional spacetimes, a novel astrophysical source of squeezed graviton states, due to superradiant axionic clouds surrounding rotating (Kerr-type) black holes (BH). The microscopic origin of these axions is diverse, ranging fr...
Long-range photonic device-independent quantum key distribution using SPDC sources and linear optics
Morteza Moradi, Maryam Afsary, Piotr Mironowicz +2 more·Jul 31, 2025
We address the question of the implementation of long-distance device-independent quantum key distribution (DI QKD) by proposing two experimentally viable schemes. Those schemes only use spontaneous parametric down-conversion (SPDC) sources and linea...
Are controlled unitaries helpful?
Ewin Tang, John Wright·Jul 31, 2025
Many quantum algorithms, to compute some property of a unitary $U$, require access not just to $U$, but to $cU$, the unitary with a control qubit. We show that having access to $cU$ does not help for a large class of quantum problems. For a quantum c...
Dynamical mean field theory with quantum computing
Thomas Ayral·Jul 31, 2025
Near-term quantum processors are limited in terms of the number of qubits and gates they can afford. They nevertheless give unprecedented access to programmable quantum systems that can efficiently, although imperfectly, simulate quantum time evoluti...
Intrinsic heralding and optimal decoders for non-Abelian topological order
D. Jing, Pablo Sala, Liang Jiang +1 more·Jul 31, 2025
Topological order (TO) provides a natural platform for storing and manipulating quantum information. However, its stability to noise has only been systematically understood for Abelian TOs. In this work, we exploit the non-deterministic fusion of non...
Quantum Key Distribution
S. Kish, J. Pieprzyk, Seyit Ahmet Camtepe·Jul 31, 2025
Quantum Key Distribution (QKD) is a technology that ensures secure communication by leveraging the principles of quantum mechanics, such as the no-cloning theorem and quantum uncertainty. This chapter provides an overview of this quantum technology's...
Quantum simulation of Helmholtz equations via Schr{ö}dingerization
Anjiao Gu, Shi Jin, Chuwen Ma·Jul 31, 2025
The Helmholtz equation is a prototypical model for time-harmonic wave propagation. Numerical solutions become increasingly challenging as the wave number $k$ grows, due to the equation's elliptic yet noncoercive character and the highly oscillatory n...
Dimension reduction with structure-aware quantum circuits for hybrid machine learning
A. Daskin·Jul 31, 2025
Schmidt decomposition of a vector can be understood as writing the singular value decomposition (SVD) in vector form. A vector can be written as a linear combination of tensor product of two dimensional vectors by recursively applying Schmidt decompo...
Entanglement spreading and emergent locality in Brownian SYK chains
Onkar Parrikar, Jatin A. Narde, Harshit Rajgadia +1 more·Jul 31, 2025
The Ryu-Takayanagi (RT) formula and its interpretation in terms of quantum error correction (QEC) implies an emergent locality for the spread of quantum information in holographic CFTs, where information injected at a point in the boundary theory spr...
SOME: Symmetric One-Hot Matching Elector — A Lightweight Microsecond Decoder for Quantum Error Correction
Xinyi Guo, Geguang Miao, Shinichi Nishizawa +3 more·Jul 31, 2025
Conventional quantum error correction (QEC) de-coders such as Minimum-Weight Perfect Matching (MWPM) and Union-Find (UF) offer high thresholds and fast decoding, respectively, but both suffer from high topological complexity. In contrast, Ising model...
Enhanced Extrapolation-Based Quantum Error Mitigation Using Repetitive Structure in Quantum Algorithms
Boseon Kim, Wooyeong Song, Kwang-il Bae +2 more·Jul 31, 2025
Quantum error mitigation is a crucial technique for suppressing errors especially in noisy intermediate-scale quantum devices, enabling more reliable quantum computation without the overhead of full error correction. Zero-Noise Extrapolation (ZNE), w...
Transfer Entropy and O-Information to Detect Grokking in Tensor Network Multi-Class Classification Problems
Domenico Pomarico, Roberto Cilli, A. Monaco +10 more·Jul 31, 2025
Quantum-enhanced machine learning, encompassing both quantum algorithms and quantum-inspired classical methods such as tensor networks, offers promising tools for extracting structure from complex, high-dimensional data. In this work, we study the tr...
Search for $t\bar tt\bar tW$ Production at $\sqrt{s} = 13$ TeV Using a Modified Graph Neural Network at the LHC
Syed Haider Ali, A. Ahmad, Muhammad Saiel +1 more·Jul 31, 2025
The simultaneous production of four top quarks in association with a ($W$) boson at $(\sqrt{s} = 13)$ TeV is an rare SM process with a next-to-leading-order (NLO) cross-section of $(6.6^{+2.4}_{-2.6} {ab})$\cite{saiel}. Identifying this process in th...