Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
High-fidelity realisation of CNOT gate in Majorana-based optical platform
Jia-Kun Li, Kai Sun, Ze-Yan Hao +7 more·Aug 20, 2025
We present the experimental realisation of a robust CNOT quantum gate using Majorana zero modes simulated on a photonic platform. Three Kitaev chains supporting Majorana zero modes at their endpoints are used to encode two logical qubits, and both in...
Reinforcement learning entangling operations on spin qubits
M. Abedi, Markus Schmitt·Aug 20, 2025
High-fidelity control of one- and two-qubit gates past the error correction threshold is an essential ingredient for scalable quantum computing. We present a reinforcement learning (RL) approach to find entangling protocols for semiconductor-based si...
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...
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...
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...
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...
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 ...
Graybox characterization and calibration with finite-shot estimation on superconducting-qubit experiments
Poramet Pathumsoot, A. Chantasri, Michal Hajduvsek +1 more·Aug 18, 2025
Characterization and calibration of quantum devices are necessary steps to achieve fault-tolerant quantum computing. As quantum devices become more sophisticated, it is increasingly essential to rely not only on physics-based models, but also on pred...
Generalized number-phase lattice encoding of a bosonic mode for quantum error correction
D. Hu, Weizhou Cai, Chang-Ling Zou +1 more·Aug 16, 2025
Bosonic systems offer unique advantages for quantum error correction, as a single bosonic mode provides a large Hilbert space to redundantly encode quantum information. However, previous studies have been limited to exploiting symmetries in the quadr...
Wireless Josephson parametric amplifier above 20 GHz
Z. Hao, J. Cochran, Y. -C. Chang +2 more·Aug 15, 2025
Operating superconducting qubits at elevated temperatures offers increased cooling power and thus system scalability, but requires suppression of thermal photons to preserve coherence and readout fidelity. This motivates migration to higher operation...
One, Two, Three: One Empirical Evaluation of a Two-Copy Shadow Tomography Scheme with Triple Efficiency
Viet T. Tran, R. Kueng·Aug 15, 2025
Shadow tomography protocols have recently emerged as powerful tools for efficient quantum state learning, aiming to reconstruct expectation values of observables with considerably fewer resources than traditional quantum state tomography. For the par...
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...
Simulating Mass-Dependent Decoherence in Quantum Computers: Baseline Signatures for Testing Gravity-Induced Collapse
V. Balaji, Samuel Punch·Aug 14, 2025
We present a quantum computing simulation study of mass-dependent decoherence models inspired by Penrose's gravity-induced collapse hypothesis. According to objective reduction (OR) theory, quantum superpositions become unstable when the gravitationa...
Efficient Quantum Information-Inspired Ansatz for Variational Quantum Eigensolver Algorithm: Applications to Atomic Systems
A. Kalam, Prasenjit Deb, A. Sakurai +3 more·Aug 14, 2025
We present a quantum information-inspired ansatz for the variational quantum eigensolver (VQE) and demonstrate its efficacy in calculating ground-state energies of atomic systems. Instead of adopting a heuristic approach, we start with an approximate...
Reliable high-accuracy error mitigation for utility-scale quantum circuits
D. Aharonov, O. Alberton, I. Arad +36 more·Aug 14, 2025
Error mitigation is essential for unlocking the full potential of quantum algorithms and accelerating the timeline toward quantum advantage. As quantum hardware progresses to push the boundaries of classical simulation, efficient and robust error mit...
Decoded quantum interferometry under noise
Kaifeng Bu, Weichen Gu, Dax Enshan Koh +1 more·Aug 14, 2025
Decoded quantum interferometry (DQI) is a recently proposed quantum optimization algorithm that exploits sparsity in the Fourier spectrum of objective functions, with the potential for exponential speedups over classical algorithms on suitably struct...
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...
Improving quantum communication rates with permutation-invariant codes
Sujeet Bhalerao, Felix Leditzky·Aug 13, 2025
In this work we improve the quantum communication rates of various quantum channels of interest using permutation-invariant quantum codes. We focus in particular on parametrized families of quantum channels and aim to improve bounds on their quantum ...
Fault tolerant Operations in Majorana-based Quantum Codes: Gates, Measurements and High Rate Constructions
Maryam Mudassar, Alexander Schuckert, Daniel Gottesman·Aug 13, 2025
Majorana-based quantum computation in nanowires and neutral atoms has gained prominence as a promising platform to encode qubits and protect them against noise. In order to run computations reliably on such devices, a fully fault-tolerant scheme is n...
Bridging Theory and Practice in Quantum Game Theory: Optimized Implementation of the Battle of the Sexes with Error Mitigation on NISQ Hardware
Germ'an D'iaz Agreda, Carlos Andrés Duran Paredes, Mateo Buenaventura Samboni +2 more·Aug 12, 2025
Implementing quantum game theory on real hardware is challenging due to noise, decoherence, and limited qubit connectivity, yet such demonstrations are essential to validate theoretical predictions. We present one of the first full experimental reali...