Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Fractional topology in open systems
Xi Wu, Xiang Zhang, Fuxiang Li·Mar 4, 2026
We investigate the emergence of fractional topological invariants in a periodic Su-Schrieffer- Heeger chain subject to gain and loss, governed by the Gorini-Kossakowski-Sudarshan-Lindblad master equations. After preparing the symmetry condition for i...
Towards Practical Quantum Federated Learning: Enhancing Efficiency and Noise Tolerance
Suzukaze Kamei, Hideaki Kawaguchi, Takahiko Satoh·Mar 4, 2026
Federated Learning (FL) enables privacy-preserving distributed model training, yet remains vulnerable to gradient inversion and model leakage attacks. Quantum communication has been proposed to provide information-theoretic security for parameter agg...
Local vs global dynamics in a dissipative qubit-impurity system
Giuseppe Emanuele Chiatto, Giuliano Chiriacó, Elisabetta Paladino +1 more·Mar 4, 2026
We analyse the dynamics of a qubit coupled to a dissipative impurity by comparing local and global derivation schemes of a Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) master equation within the Born-Markov and full secular (FS) approximations. We sh...
O-Sensing: Operator Sensing for Interaction Geometry and Symmetries
Meng Ye-Ming, Shi Zhe-Yu·Mar 4, 2026
We ask whether the Hamiltonian, interaction geometry, and symmetries of a quantum many-body system can be inferred from a few low-lying eigenstates without knowing which sites interact with each other. Directly solving the eigenvalue equations impose...
Approximate Amplitude Encoding with the Adaptive Interpolating Quantum Transform
Gekko Budiutama, Shunsuke Daimon, Xinchi Huang +2 more·Mar 4, 2026
Amplitude encoding of real-world data on quantum computers is often the workflow bottleneck: direct amplitude encoding scales poorly with input size and can offset any speedups in subsequent processing. Fourier-based sparse amplitude encoding lowers ...
Variational Gibbs State Preparation on Trapped-Ion Devices
Reece Robertson, Mirko Consiglio, Josey Stevens +3 more·Mar 4, 2026
We implement a variational quantum algorithm for Gibbs state preparation of a transverse-field Ising model on IonQ's quantum computers. To this end, we train the variational parameters via classical simulation and perform state tomography on the quan...
Enhancing Variational Quantum Eigensolvers for SU(2) Lattice Gauge Theory via Systematic State Preparation
Klaus Liegener, Dominik Mattern, Alexander Korobov +7 more·Mar 4, 2026
Computing the vacuum and energy spectrum in non-Abelian, interacting lattice gauge theories remains an open challenge, in part because approximating the continuum limit requires large lattices and huge Hilbert spaces. To address this difficulty with ...
Overflow-Safe Polylog-Time Parallel Minimum-Weight Perfect Matching Decoder: Toward Experimental Demonstration
Ryo Mikami, Hayata Yamasaki·Mar 4, 2026
Fault-tolerant quantum computation (FTQC) requires fast and accurate decoding of quantum errors, which is often formulated as a minimum-weight perfect matching (MWPM) problem. A determinant-based approach has been proposed as a novel method to surpas...
Quantum anomaly for benchmarking quantum computing
Tomoya Hayata, Arata Yamamoto·Mar 4, 2026
Given the rapid advances in quantum computing hardware, establishing systematic strategies for verifying the correctness of quantum computations has become increasingly important. Exploiting the fact that the axial anomaly in gauge theories is exact ...
Resource-Efficient Emulation of Majorana Zero Mode Braiding on a Superconducting Trijunction
Rahul Singh, Weixin Lu, Kaelyn J Ferris +1 more·Mar 4, 2026
Topological superconductivity could host quasiparticles that are key candidates for fault-tolerant quantum computation due to their immunity to noise as they obey non-Abelian exchange statistics. For example, in the case of Majorana Zero Modes (MZM),...
Variational Quantum Transduction
Pengcheng Liao, Haowei Shi, Quntao Zhuang·Mar 4, 2026
Quantum transducers are critical for quantum interconnect, enabling coherent signal transfer across disparate frequency domains. Beyond material and device advances, protocol design has become a powerful means to improve transduction. We introduce a ...
Mitigating many-body quantum crosstalk with tensor-network robust control
Nguyen H. Le, Florian Mintert, Eran Ginossar·Mar 4, 2026
Quantum crosstalk poses a major challenge to scaling up quantum computations as its strength is typically unknown and its effect accumulates exponentially as system size grows. Here, we show that many-body robust control can be utilized to suppress u...
Quantum-Assisted Optimal Rebalancing with Uncorrelated Asset Selection for Algorithmic Trading Walk-Forward QUBO Scheduling via QAOA
Abraham Itzhak Weinberg·Mar 4, 2026
We present a hybrid classical-quantum framework for portfolio construction and rebalancing. Asset selection is performed using Ledoit-Wolf shrinkage covariance estimation combined with hierarchical correlation clustering to extract n = 10 decorrelate...
Sequence and Image Transformations with Monarq: Quantum Implementations for NISQ Devices
Jan Balewski, Roel Van Beeumen, E. Wes Bethel +1 more·Mar 3, 2026
We introduce Monarq, a unified quantum data processing framework that combines QCrank encoding with the EHands protocol for polynomial transformations, and demonstrate its implementation on noisy intermediate-scale quantum (NISQ) hardware. This frame...
Frequency-Time Multiplexing for Near-Deterministic Generation of n-Photon Frequency-Bin States
Alex Fischer, Nathan T. Arnold, Colin P. Lualdi +5 more·Mar 3, 2026
One of the primary challenges of photonic quantum information processing is the on-demand preparation of multiple single-photon-level quantum states from probabilistic photon pair sources. Motivated by recent developments in frequency-bin-encoded pho...
Star-exponential for Fermi systems and the Feynman-Kac formula
J. Berra-Montiel, H. García-Compeán, A. Kafuri +1 more·Mar 3, 2026
Inspired by the formalism that relates the star-exponential with the quantum propagator for bosonic systems, in this work we introduce the analogous extension for the fermionic case. In particular, we analyse the problem of calculating the star-expon...
Sleeping Beauty in One or Many Worlds: A Defense of the Halfer Position
Jiaxuan Zhang·Mar 3, 2026
The Sleeping Beauty Problem (SBP) is a long-standing puzzle in classical probability theory and has been used to challenge the Many-Worlds Interpretation (MWI) of quantum mechanics, since both involve objective determinacy combined with subjective un...
Full-dimensional quantum scattering calculations of rovibrationally excited HD+HD collisions
Bikramaditya Mandal, Hubert Jóźwiak, Piotr Wcisło +1 more·Mar 3, 2026
Full-dimensional quantum scattering calculations are reported for ro-vibrational transitions in HD+HD collisions using a highly accurate interaction potential for the H$_2$-H$_2$ system. Several near-resonant ro-vibrational transitions are identified...
Quantum Lego Power-up: Designing Transversal Gates with Tensor Networks
ChunJun Cao, Brad Lackey·Mar 3, 2026
Transversal gates are the simplest form of fault-tolerant gates and are relatively easy to implement in practice. Yet designing codes that support useful transversal operations -- especially non-Clifford or addressable gates -- remains difficult with...
Analogue Hawking radiation in nonlinear quantum optics
Isaac Bernal, Miguel A. Cortés-Ortiz, David Bermudez·Mar 3, 2026
The Hawking effect can be understood as a broad kinematic phenomenon associated with mode behavior near a horizon. While astrophysical black holes produce one specific realization of this radiation, this perspective inspires extensive theoretical and...