Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Exceptional deficiency of non-Hermitian systems
Zhen Li, Xulong Wang, Rundong Cai +5 more·Apr 16, 2025
Exceptional points (EPs) are non-Hermitian singularities associated with the coalescence of individual eigenvectors accompanied by the degeneracy of their complex energies. Here, we report the discovery of a generalization to the concept of EP called...
On the Convergence of Markov Chain Distribution within Quantum Walk Circuit Subspace
Aingeru Ramos, Jose A. Pascual, Javier Navaridas +1 more·Apr 16, 2025
Markov Chain Monte Carlo (MCMC) methods are algorithms for sampling probability distributions, commonly applied to the Boltzmann distribution in physical and chemical models such as protein folding and the Ising model. These methods enable exploratio...
Characterizing physical and logical errors in a transversal CNOT via cycle error reconstruction
Nicholas Fazio, Robert Freund, Debankan Sannamoth +7 more·Apr 16, 2025
The development of prototype quantum information processors has progressed to a stage where small instances of logical qubit systems perform better than the best of their physical constituents. Advancing towards fault-tolerant quantum computing will ...
Hardware Co-Designed Optimal Control for Programmable Atomic Quantum Processors via Reinforcement Learning
Qian Ding, Dirk Englund·Apr 16, 2025
Developing scalable, fault-tolerant atomic quantum processors requires precise control over large arrays of optical beams. This remains a major challenge due to inherent imperfections in classical control hardware, such as inter-channel crosstalk and...
Advancing quantum simulations of nuclear shell model with noise-resilient protocols
Nifeeya Singh, P. Siwach, P. Arumugam·Apr 16, 2025
Some of the computational limitations in solving the nuclear many-body problem could be overcome by utilizing quantum computers. The nuclear shell-model calculations providing deeper insights into the properties of atomic nuclei, is one such case wit...
Phonon-coupled hole-spin qubits in high-purity germanium: design and modeling of a scalable architecture
D. Mei, S. Panamaldeniya, K. Dong +3 more·Apr 16, 2025
We present a design and modeling of a scalable quantum processor architecture utilizing hole-spin qubits defined in gate-controlled germanium (Ge) quantum dots, where coherent spin–phonon coupling is predicted to facilitate qubit manipulation and lon...
Network-Integrated Decoding System for Real-Time Quantum Error Correction with Lattice Surgery
Namitha Liyanage, Yue Wu, Emmet Houghton +1 more·Apr 16, 2025
Existing real-time decoders for surface codes are limited to isolated logical qubits and do not support logical operations involving multiple logical qubits. We present Deconet, a first-of-its-kind decoding system that scales to thousands of logical ...
Logical multi-qubit entanglement with dual-rail superconducting qubits
Wenhui Huang, Xuandong Sun, Jiawei Zhang +21 more·Apr 16, 2025
Recent advances in quantum error correction (QEC) across hardware platforms have demonstrated operation near and beyond the fault-tolerance threshold, yet achieving exponential suppression of logical errors through code scaling remains a critical cha...
Constant-time hybrid compilation of Shor's algorithm with quantum just-in-time compilation
David Ittah, J. Fraser, Josh Izaac +1 more·Apr 16, 2025
Continuous improvements in quantum computing hardware are exposing the need for simultaneous advances in software. Large-scale implementation of quantum algorithms requires rapid and automated compilation routines such as circuit synthesis and optimi...
Locality-Aware Pauli-Based Computation for Local Magic State Preparation
Yutaka Hirano, Keisuke Fujii·Apr 16, 2025
Magic state distillation, a process for preparing magic states needed to implement non-Clifford gates faulttolerantly, plays a crucial role in fault-tolerant quantum computation. Historically, it has been a major bottleneck, leading to the pursuit of...
Quantum simulations of nuclear resonances with variational methods
A. Singh, P. Siwach, P. Arumugam·Apr 16, 2025
The many-body nature of nuclear physics problems poses significant computational challenges. These challenges become even more pronounced when studying the resonance states of nuclear systems, which are governed by the non-Hermitian Hamiltonian. Quan...
A complete theory of the Clifford commutant
Lennart Bittel, J. Eisert, Lorenzo Leone +2 more·Apr 16, 2025
The Clifford group plays a central role in quantum information science. It is the building block for many error-correcting schemes and matches the first three moments of the Haar measure over the unitary group -a property that is essential for a broa...
Adaptive Entanglement Distillation
Sijie Cheng, Narayanan Rengaswamy·Apr 15, 2025
Quantum network applications impose a variety of requirements on entanglement resources in terms of rate, fidelity, latency, and more. The repeaters in the quantum network must combine good methods for entanglement generation, effective entanglement ...
Work Statistics and Quantum Trajectories: No-Click Limit and non-Hermitian Hamiltonians
Manali Malakar, Alessandro Silva·Apr 15, 2025
We investigate quantum work statistics within the standard two-point measurement (TPM) scheme in continuously monitored quantum systems, including the effects of generalized unitary evolution, possibly controlled by quantum circuit models, and multip...
Hybrid Authentication Protocols for Advanced Quantum Networks
Suchetana Goswami, Mina Doosti, Elham Kashefi·Apr 15, 2025
Authentication is a fundamental building block of secure quantum networks, essential for quantum cryptographic protocols and often debated as a key limitation of quantum key distribution (QKD) in security standards. Most quantum-safe authentication s...
Optically Switchable Fluorescence Enhancement at Critical Interparticle Distances
Arda Gulucu, Emre Ozan Polat·Apr 15, 2025
Plasmonic nanostructures provide electric field localization to be used as a fluorescence enhancement tool for the closely located fluorophores. However, metallic structures exhibit non-radiative energy transfer at close proximity, which suppresses t...
Probing Quantum Anomalous Hall States in Twisted Bilayer WSe2 via Attractive Polaron Spectroscopy
Beini Gao, Mahdi Ghafariasl, Mahmoud Jalali Mehrabad +15 more·Apr 15, 2025
Moiré superlattices in semiconductors exhibit a rich variety of interaction-induced topological states, including quantum anomalous Hall (QAH) effects. A recent study hinted that twisted WSe2 homobilayer (tWSe2) could host a QAH state but lacked dire...
Entangled Subspaces through Algebraic Geometry
Masoud Gharahi, Stefano Mancini·Apr 15, 2025
We propose an algebraic geometry-inspired approach for constructing entangled subspaces within the Hilbert space of a multipartite quantum system. Specifically, our method employs a modified Veronese embedding, restricted to the conic, to define subs...
Fault Tolerant Quantum Simulation via Symplectic Transvections
Zhuangzhuang Chen, Jack Owen Weinberg, Narayanan Rengaswamy·Apr 15, 2025
Conventional approaches to fault-tolerant quantum computing realize logical circuits gate-by-gate, synthesizing each gate independently on one or more code blocks. This incurs excess overhead and doesn't leverage common structures in quantum algorith...
Probe of Generic Quantum Contextuality and Nonlocal Resources for Qubits
Wei Li, Min-Xuan Zhou, Yun-Hao Shi +3 more·Apr 15, 2025
We reveal that the entropic uncertainty relation with a quantum memory is able to intrinsically connect local generic contextuality addressed in the pioneering work by Spekkens and nonlocal quantum resources such as entanglement and Bell nonlocality....