Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Spectral analysis of the Koopman operator recovers Hamiltonian parameters in open quantum systems
Jorge E. Pérez-García, Carlos Colchero, Julio C. Gutiérrez-Vega·Nov 28, 2025
Accurate identification of Hamiltonian parameters is essential for modeling and controlling open quantum systems. In this work, we demonstrate that the multichannel Hankel alternative view of Koopman (mHAVOK) algorithm is a robust and reliable spectr...
COMPAS: A Distributed Multi-Party SWAP Test for Parallel Quantum Algorithms
Brayden Goldstein-Gelb, Kun Liu, John M. Martyn +4 more·Nov 28, 2025
The limited number of qubits per chip remains a critical bottleneck in quantum computing, motivating the use of distributed architectures that interconnect multiple quantum processing units (QPUs). However, executing quantum algorithms across distrib...
Identifying genuine entanglement of lossy noisy very large scale continuous variable Greenberger-Horne-Zeilinger state
Xiao-yu Chen·Nov 28, 2025
Genuine entanglement identification of large scale systems is crucial for quantum computation, quantum communication and quantum learning advantage. In contrast to experiments, where noisy intermediate-scale programmable photonic quantum processors h...
Benchmarking neutral atom-based quantum processors at scale
Andrea B. Rava, Kristel Michielsen, J. A. Montanez-Barrera·Nov 28, 2025
In recent years, neutral atom-based quantum computation has been established as a competing alternative for the realization of fault-tolerant quantum computation. However, as with other quantum technologies, various sources of noise limit their perfo...
Noise-Robustness for Delegated Quantum Computation in the Circuit Model
Anne Broadbent, Joshua Nevin·Nov 28, 2025
Cloud-based quantum computing, coupled with the rapid progress in quantum algorithms, brings to the forefront the question of verifiability in delegated quantum computations. In the current landscape of noisy quantum devices, this question must be ad...
Extensive search of Shannon entropy-based randomness certification protocols
Robert Okuła, Piotr Mironowicz·Nov 27, 2025
Quantum technologies offer significant advancements in information processing and communication, notably in the domain of random number generation (RNG). The use of Bell inequalities enables users to certify the randomness of outputs produced by untr...
OPI x Soft Decoders
André Chailloux·Nov 27, 2025
In recent years, a particularly interesting line of research has focused on designing quantum algorithms for code and lattice problems inspired by Regev's reduction. The core idea is to use a decoder for a given code to find short codewords in its du...
Integrated polarization-entangled photon source for wavelength-multiplexed quantum networks
Xiaodong Shi, Yue Li, Jinyi Du +13 more·Nov 27, 2025
Entangled photons are fundamental resources for quantum communication, computing, and networking. Among them, polarization-entangled photon pairs play an important role due to their straightforward state manipulation and direct use in quantum key dis...
Recursive Clifford noise reduction
Aharon Brodutch, Gregory Baimetov, Edwin Tham +1 more·Nov 27, 2025
Clifford noise reduction (CliNR) is a partial error correction scheme that reduces the logical error rate of Clifford circuits at the cost of a modest qubit and gate overhead. The CliNR implementation of an $n$-qubit Clifford circuit of size $s$ achi...
Superconducting Qubit Gates Robust to Parameter Fluctuations
Emily Wright, Leo Van Damme, Niklas J. Glaser +14 more·Nov 27, 2025
State-of-the-art single-qubit gates on superconducting transmon qubits can achieve the fidelities required for error-corrected computations. However, parameter fluctuations due to qubit instabilities, environmental changes, and control inaccuracies m...
High-Precision Fidelity Estimation with Common Randomized Measurements
Zhongyi Yang, Datong Chen, Zihao Li +1 more·Nov 27, 2025
Efficient fidelity estimation of multiqubit quantum states is crucial to many applications in quantum information processing. However, to estimate the infidelity $ε$ with multiplicative precision, conventional estimation protocols require (order) $1/...
Radio-Frequency Hong-Ou-Mandel Interference with Conditionally Built States
A. Sheleg, D. Vovchuk, K. Boiko +8 more·Nov 27, 2025
We report an experimental demonstration of room-temperature Hong-Ou-Mandel (HOM) interference at a radio-wave frequency of 120 MHz using conditional build-up of quantum states from classical phase-averaged coherent states. This approach enables obser...
Effect of Energy Extensivity on the Performance of Open Quantum Interferometers
Žan Kokalj, Tommaso Favalli, Andrea Trombettoni·Nov 27, 2025
Studying the performance of a quantum interferometer coupled to an external environment is a problem of conceptual and practical importance. If we consider a quantum interferometer featuring Heisenberg-limited sensitivity, then a typical result is th...
Quantum resource degradation theory within the framework of observational entropy decomposition
Xiang Zhou·Nov 27, 2025
We introduce a theory of quantum resource degradation grounded in a decomposition of observational entropy, which partitions the total resource into inter-block coherence ($\mathcal{C}_{\text{rel}}$) and intra-block noise ($\mathcal{D}_{\text{rel}}$)...
Unifying Collective Effects in Emission, Absorption, and Transfer
Adesh Kushwaha, Erik M. Gauger, Ivan Kassal·Nov 27, 2025
Collective effects, such as superradiance and subradiance are central to emerging quantum technologies -- from sensing to energy storage -- and play an important role in light-harvesting. These effects enhance or suppress rates of dynamic processes (...
Controlled-SWAP gates by tuning of interfering transition pathways in neutral atom arrays
Mohammadsadegh Khazali, Klaus Mølmer·Nov 27, 2025
Neutral-atom quantum processors employ Rydberg blockade for multiqubit phase operations but lack similar native exchange and conditional exchange gates, which are essential primitives for state verification, fermionic and XY-model simulation, and eff...
Optimal Control for Rydberg multi-qubit operations
Hossein Abedi, Mohammadsadegh Khazali, Klaus Mølmer·Nov 27, 2025
Quantum computing algorithms can be decomposed into a universal set of elementary one- and two-qubit gates. Different physical implementations of quantum computing, however, employ interactions that permit direct conditional dynamics on multiple qubi...
Quantum Simulation of Ligand-like Molecules through Sample-based Quantum Diagonalization in Density Matrix Embedding Framework
Ashish Kumar Patra, Anurag K. S. V., Sai Shankar P. +4 more·Nov 27, 2025
The accurate treatment of electron correlation in extended molecular systems remains computationally challenging using classical electronic structure methods. Hybrid quantum-classical algorithms offer a potential route to overcome these limitations; ...
Towards Heterogeneous Quantum Federated Learning: Challenges and Solutions
Ratun Rahman, Dinh C. Nguyen, Christo Kurisummoottil Thomas +1 more·Nov 27, 2025
Quantum federated learning (QFL) combines quantum computing and federated learning to enable decentralized model training while maintaining data privacy. QFL can improve computational efficiency and scalability by taking advantage of quantum properti...
Quantum Sensing using Geometrical Phase in Qubit-Oscillator Systems
Nishchay Suri, Zhihui Wang, Tanay Roy +2 more·Nov 26, 2025
We present a quantum sensing protocol for coupled qubit-oscillator systems that surpasses the standard quantum limit (SQL) by exploiting a geometrical phase. The signal is encoded in the geometrical phase that is proportional to the area enclosed in ...