Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Analytical bounds for decoy-state quantum key distribution with discrete phase randomization
Zhaohui Liu, Ahmed Lawey, Mohsen Razavi·Aug 20, 2025
We analyze the performance of quantum key distribution (QKD) protocols that rely on discrete phase randomization (DPR). For many QKD protocols that rely on weak coherent pulses (WCPs), continuous phase randomization is assumed, which simplifies the s...
Breaking conservation law enables steady-state entanglement out of equilibrium
Vince Hou, Eric Kleinherbers, Shane P. Kelly +1 more·Aug 20, 2025
We show how entangled steady states can be prepared by purely dissipative dynamics in a system coupled to a thermal environment. While entanglement is hindered by thermalization when the system and environment exchange a conserved quantity, we demons...
Improving VQE parameter quality on noisy quantum processors with cost-effective readout error mitigation
N. Belaloui, Abdellah Tounsi, Abdelmouheymen Rabah Khamadja +4 more·Aug 20, 2025
The inherent noise in current Noisy Intermediate-Scale Quantum (NISQ) devices presents a major obstacle to the accurate implementation of quantum algorithms such as the Variational Quantum Eigensolver (VQE) for quantum chemistry applications. This st...
Spin versus Magic: Lessons from Gluon and Graviton Scattering
John Gargalionis, Nathan Moynihan, S. Trifinopoulos +3 more·Aug 20, 2025
The quantum property of non-stabiliserness, also known as magic, plays a key role in designing quantum computing systems. How to produce, manipulate and enhance magic remains mysterious, such that concrete examples of physical systems that manifest m...
Single-click protocols for remote state preparation using weak coherent pulses
Janice van Dam, Emil R. Hellebek, Tzula B. Propp +3 more·Aug 20, 2025
Remote state preparation (RSP) allows one party to remotely prepare a known quantum state on another party's qubit using entanglement. This can be used in quantum networks to perform applications such as blind quantum computing or long-distance quant...
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...
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 ...
Quantum Flow Matching
Zidong Cui, Pan Zhang, Ying Tang·Aug 17, 2025
The flow matching has rapidly become a dominant paradigm in classical generative modeling, offering an efficient way to interpolate between two complex distributions. We extend this idea to the quantum realm and introduce the Quantum Flow Matching (Q...
Learning to Restore Heisenberg Limit in Noisy Quantum Sensing via Quantum Digital Twin
Hang Xu, Tailong Xiao, Jingzheng Huang +2 more·Aug 15, 2025
Quantum sensors leverage nonclassical resources to achieve sensing precision at the Heisenberg limit, surpassing the standard quantum limit attainable through classical strategies. However, a critical issue is that the environmental noise induces rap...
Generation of frequency-bin-encoded dual-rail cluster states via time-frequency multiplexing of microwave photonic qubits
Zhiling Wang, Takeaki Miyamura, Yoshiki Sunada +4 more·Aug 14, 2025
Cluster states are a class of multi-qubit entangled states with broad applications such as quantum metrology and one-way quantum computing. Here, we present a protocol to generate frequency-bin-encoded dual-rail cluster states using a superconducting...
Magic tricycles: Efficient magic state generation with finite block-length quantum LDPC codes
Varun Menon, J. P. Bonilla-Ataides, Rohan K. Mehta +3 more·Aug 14, 2025
The preparation of high-fidelity non-Clifford (magic) states is an essential subroutine for universal quantum computation, but imposes substantial space-time overhead. Magic state factories based on high rate and distance quantum low-density parity c...
A Constant-Time Hardware Architecture for the CSIDH Key-Exchange Protocol
Sina Bagheri, Masoud Kaveh, Francisco Hernando-Gallego +2 more·Aug 14, 2025
The commutative supersingular isogeny Diffie-Hellman (CSIDH) algorithm is a promising post-quantum key exchange protocol, notable for its exceptionally small key sizes, but hindered by computationally intensive key generation. Furthermore, practical ...
Parity Cross-Resonance: A Multiqubit Gate
Xuexin Xu, Siyu Wang, Radhika H. Joshi +2 more·Aug 14, 2025
We present a native three-qubit entangling gate that exploits engineered interactions to realize control-control-target and control-target-target operations in a single coherent step. Unlike conventional decompositions into multiple two-qubit gates, ...
Procedural Generation and Games at the Dawn of Fault Tolerant Quantum Computing
Daniel Bultrini, James R. Wootton·Aug 13, 2025
Vision paper Abstract-Quantum computers have long been more of a toy for researchers than a tool for solving complex problems. However, recent advances in the field make exploiting the advantages of fault-tolerant quantum computers feasible in the ne...
Metrological power of single-qubit dynamical Casimir effect in circuit QED
H.R. Schelb, A. P. Costa, A. Dodonov·Aug 13, 2025
We consider a nonstationary circuit QED system described by the quantum Rabi model, in which an artificial two-level atom with a tunable transition frequency is coupled to a single-mode resonator. We focus on regimes where the external modulation tak...
Subsampling Factorization Machine Annealing
Yusuke Hama, Tadashi Kadowaki·Aug 12, 2025
Quantum computing and machine learning are state-of-the-art technologies that have been investigated intensively in both academia and industry. The hybrid technology of these two ingredients is expected to be a powerful tool to solve complex problems...
Single-gate, multipartite entanglement on a room-temperature quantum register
Joseph D. Minnella, Mathieu Ouellet, Amelia R. Klein +1 more·Aug 11, 2025
Multipartite entanglement is an essential aspect of quantum systems, needed to execute quantum algorithms, implement error correction, and achieve quantum-enhanced sensing. In solid-state quantum registers such nitrogen-vacancy (NV) centers in diamon...
Cold atomic ensembles as quantum antennas for distributed networks of single-atom arrays
Xiaoshui Lin, Yefeng Mei, Chuanwei Zhang·Aug 11, 2025
Single neutral atoms in optical tweezer arrays offer a promising platform for high-fidelity quantum computing at local nodes. Nonetheless, creating entanglement between remote nodes in a distributed quantum network remains challenging due to inherent...
Expanding a 4-qubit Dicke state to a 5-qubit Dicke state with limited qubit access
Bibhuti Thapa, Oberon Moran, Duc-Kha Vu +1 more·Aug 11, 2025
Preparing multipartite entangled states under restricted qubit access is a key challenge for modular and distributed quantum architectures. We address this by presenting two complementary circuits. First, we propose a resource-efficient deterministic...
Bridging Classical and Quantum Computing for Next-Generation Language Models
Yi Pan, Hanqi Jiang, Junhao Chen +6 more·Aug 9, 2025
The remarkable success of Transformer architectures in Large Language Models (LLMs) has revolutionized natural language processing, yet the transition to quantum computing for next-generation language models remains an open challenge. While quantum c...