Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Spin-Momentum Impedance and Filtering by a Spin-Coupled Absorbing Boundary Condition
Alireza Jozani·Jun 24, 2026
Absorbing boundaries are often treated as scalar sinks. Here we show that a spin-coupled absorbing boundary for a Pauli particle acts instead as a spin--momentum impedance. Its tangential boundary symbol has two branches, $iκ\pm|\boldsymbolξ|$, coupl...
Towards Robust Optimal Measurements Against Noise in Quantum Metrology
Xinglei Yu, Xinzhi Zhao, Liangsheng Li +4 more·Jun 24, 2026
Quantum parameter estimation utilizes quantum mechanical effects to attain higher measurement precision than classical schemes. In practical implementations, however, noise is inevitably present during the measurement process, causing a decrease in p...
Anomalous topological superradiant phases
You-Qi Lu, Yu-Yu Zhang, Zi-Xiang Hu·Jun 24, 2026
We present a novel set of light-matter topology realized by implementing a finite-component quantum Rabi array with a photonic analog of the Su-Schrieffer-Heeger (SSH) configuration. We demonstrate how complex light-matter couplings with species-depe...
Two-dimensional Hyperbolic RNN Neural Quantum State
H. L. Dao·Jun 24, 2026
In the first part of this work, we construct the first type of two-dimensional (2D) hyperbolic neural quantum state (NQS) in the form of the Lorentz 2DRNN (Recurrent Neural Network) and benchmark its performance against the Euclidean 2DRNN in the par...
The Cost of Removing Tunability in Quantum Data Re-Uploading
Anthony Yuezhang Liu, Lirandë Pira·Jun 24, 2026
Fixed encoding data re-uploading quantum circuits provide a striking example of universality emerging from a highly constrained architecture. However, universality alone is insufficient for assessing the theoretical and practical value of fixed and t...
Controlling radiative dynamics of a giant $Λ$-type atom via interference induced by the vacuum of a waveguide
Ci-Ming Deng, Ge Sun, Jing Lu +1 more·Jun 24, 2026
We investigate the dynamics of a $Λ$-type giant atom (GA) whose both transition coupled to the guided modes of a one-dimensional (1D) waveguide at two spatially separated points with the GA initially excited and the electromagnetic (EM) modes of wave...
Criterion for qubit-assisted quantum metrology approaching Heisenberg scaling
Peng Chen, Jun Jing·Jun 24, 2026
We study in this work the metrology precision of a probe system coupled to an ancillary qubit. Restricting the probe-qubit coupling along only one or two directions is found to be a sufficient criterion for the effective dynamical generator to achiev...
Preparing two-mode magnonic Schrödinger cat states in a cavity-magnon-qubit system
Gen Li, Gang Liu, Rong-Can Yang +1 more·Jun 24, 2026
The cavity-magnon-qubit system has recently been demonstrated as a new platform for preparing macroscopic quantum states in magnonic systems. Here, we propose to prepare a two-mode magnonic cat state, which is also a non-Gaussian entangled state, bas...
Quantum metrology of electric and magnetic dipole moments: ultimate limits and optimal regimes
Simone Cavazzoni, Paolo Bordone, Matteo G. A. Paris·Jun 24, 2026
The characterization of electric and magnetic dipole moments (EDM and MDM) in quantum systems is central to fundamental physics and quantum sensing. While EDM searches provide powerful probes of CP violation within and beyond the Standard Model, prec...
A phase-space approach for performing continuous-variable quantum teleportation with a non-Gaussian resource
Ankita, Arpita Chatterjee·Jun 24, 2026
We present a comprehensive phase-space analysis of continuous-variable quantum teleportation employing a photon-subtracted two-mode squeezed Fock state (PS-TMSFS) as an entangled resource. We investigate the usefulness of PS-TMSFS within the Braunste...
Weak decay of the positronium ion
Nishat Ul Sani, M. Jamil Aslam, Ishtiaq Ahmed·Jun 24, 2026
The positronium ion ($\mathrm{Ps}^-$), a coulombic three-body bound state of two electrons and a positron, predominantly decays via electron-positron annihilation into electromagnetic final states. While its radiative decay channels have been extensi...
Spin-imbalanced fermion on a dynamic lattice
Jie Liu, Xiaofan Zhou, Suotang Jia·Jun 24, 2026
We investigate the magnetic order of a one-dimensional spin-1/2 fermion dynamical lattice, where itinerant fermions are coupled to bond-centered localized spins via an Ising-like spin dependent hopping. The model provides an anisotropic dynamical ext...
Dissipative Quantum Multiplicative Weights with Sampling Feedback: A Classically Hard Primitive Realized via Engineered Open-System Dynamics
Agung Trisetyarso, Lenny Putri Yulianti, Kridanto Surendro·Jun 24, 2026
We introduce \emph{Dissipative Quantum Multiplicative Weights with Sampling Feedback} (DQMW-Sample), an online-learning primitive in which engineered open quantum-system dynamics prepare a Gibbs state whose computational-basis measurement supplies th...
Quantum tomography of free electrons
Y. Fang, J. Kuttruff, Z. Zhao +3 more·Jun 24, 2026
Determining the quantum state of a given quantum-mechanical system is a fundamental task in physics. Quantum-state tomography has been pivotal for establishing quantum optics [1-4] and for revealing the properties of bound charges in materials [5-7]....
Wide-field NV magnetometry under simultaneous high-pressure and high-temperature conditions
Masahiro Ohkuma, Eikichi Kimura, Shumpei Ohyama +7 more·Jun 24, 2026
We demonstrate wide-field optically detected magnetic resonance (ODMR) under simultaneous high-pressure and high-temperature conditions using nitrogen-vacancy (NV) centers. Although NV-center magnetometry has been widely used for spatially resolved m...
A Unified Josephson Dynamics Perspective for Single-Cavity BECs: From Self-Trapping to Dynamical Phase Transitions
Soi-Chan Lei·Jun 24, 2026
We investigate a two-component Bose-Einstein condensate (BEC) strongly coupled to a single optical cavity, effectively described by a mean-field Dicke model supplemented with interatomic nonlinearities. Here, we propose a unified theoretical framewor...
Routing Codes: High-Rate Quantum LDPC Codes with Short, Parallel Non-Local Connectivity
Jiaxuan Zhang, Zhao-Yun Chen, Peng Duan +6 more·Jun 24, 2026
Quantum low-density parity-check (qLDPC) codes are promising candidates for realizing large-scale fault-tolerant quantum computing. Although many codes with favorable theoretical parameters have been developed, their practical adoption must take hard...
High-Rate and Resource-Efficient All-Photonic Quantum Repeater Architectures with 9 km Repeater Spacing
Ryosuke Shiina, Kenneth Goodenough, Nathan Arnold +1 more·Jun 24, 2026
Quantum communication between two distant parties will serve as a cornerstone of the future quantum internet. However, generating enough entangled Bell pairs over long distances is a critical bottleneck. Although photons are ideal carriers of quantum...
Rapid and robust laser-frequency auto-locking using Bayesian-optimization and discrete-wavelet-transformation algorithms
Min Jiang, Xiao-Li Chen, Si-Bin Lu +8 more·Jun 24, 2026
Rapid and robust laser-frequency auto-locking is essential for the field deployment of quantum communications, quantum computing, and precision-measurement technologies; however, achieving this remains a considerable challenge. Here, we propose and d...
Quantum conditional mutual information and channel capacity
D. -S. Wang·Jun 24, 2026
Information measures acquire operational meaning through coding theorems. The quantum conditional mutual information (QCMI) is nonnegative due to strong subadditivity, yet a direct connection with channel coding has remained elusive. In this work, we...