Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Optical transport of cold atoms to quantum degeneracy
Yanqing Tao, Yufei Wang, Ligeng Yu +1 more·Feb 15, 2026
Efficient transport of cold atoms is essential for continuous operation, enabling applications ranging from atomic lasers to continuously operated qubits. However, deep potentials required to overcome vibrations, axial trap nonuniformity and insuffic...
Geometric phase of arbitrary Mueller evolutions and its two-level quantum analogue
José J Gil·Feb 15, 2026
We identify, for a general physically realizable Mueller transformation, the only intrinsic geometricphase structure that can be assigned to it in an invariant manner: the retarding part of the characteristic pure component selected by the characteri...
Fully integrated quantum frequency processor on a silicon chip
Sara Congia, Leopold Virot, Elena Rovetta +5 more·Feb 15, 2026
Frequency-bin encoding has recently emerged as a powerful approach for photonic quantum information processing, offering high dimensionality, gate-parallelization, and compatibility with existing telecommunication infrastructure. However, its scalabl...
Quantum field theory measurements for relativistic particles
Nadia Koliopoulou, Charis Anastopoulos, Ntina Savvidou·Feb 15, 2026
The formulation of a consistent measurement theory for relativistic quantum fields has become a problem of growing foundational and practical significance. Standard non-relativistic measurement models fail to incorporate the essential relativistic pr...
TensorCircuit-NG: A Universal, Composable, and Scalable Platform for Quantum Computing and Quantum Simulation
Shi-Xin Zhang, Yu-Qin Chen, Weitang Li +22 more·Feb 15, 2026
We present TensorCircuit-NG, a next-generation quantum software platform designed to bridge the gap between quantum physics, artificial intelligence, and high-performance computing. Moving beyond the scope of traditional circuit simulators, TensorCir...
Bidirectional Quantum Processor Interfacing by a 4-Kelvin Analog Signal Chain for Superconducting Qubit Control and Quantum State Readout
Deepak R, Lokendra Kanawat, Jayadeep K +1 more·Feb 15, 2026
This paper presents a comprehensive cryogenic analog signal processing architecture designed for superconducting qubit control and quantum state readout operating at 4 Kelvin. The proposed system implements a complete bidirectional signal path bridgi...
Mathematical Paradoxes of Dirac Equation Representations
V. P. Neznamov·Feb 15, 2026
This paper examines the Foldy-Wouthuysen and Feynman-Gell-Mann representations of the Dirac equation. The analysis is conducted for electrons and positrons interacting with electromagnetic fields. Versions of quantum electrodynamics are considered bo...
Approximating the $S$ matrix for solving the Marchenko equation: the case of channels with different thresholds
N. A. Khokhlov·Feb 15, 2026
This work extends previous results on the inverse scattering problem within the framework of Marchenko theory (fixed-$l$ inversion). In particular, I approximate an $n$-channel $S$-matrix as a function of the first-channel momentum $q$ by a sum of a ...
Early-stage memory effect on the dephasing charger-mediated quantum battery
Yu Wang, Jiasen Jin·Feb 15, 2026
We investigate the performance of the charger-mediated quantum battery modeled by a two-qubit system. One of the qubits acts as the battery and the other acts as the charger which is subjected to a reservoir. We derived the time-local master equation...
Non-Hermitian Quantum Mechanics of Open Quantum Systems: Revisiting The One-Body Problem
Naomichi Hatano, Gonzalo Ordonez·Feb 15, 2026
We review analyses of open quantum systems. We show how non-Hermiticity arises in an open quantum system with an infinite environment, focusing on the one-body problem. One of the reasons for taking the present approach is that we can solve the probl...
Interaction-Enabled Two- and Three-Fold Exceptional Points
Musashi Kato, Tsuneya Yoshida·Feb 15, 2026
We propose a novel type of exceptional points, dubbed interaction-enabled $n$-fold exceptional points [EP$n$s ($n=2,3$)] -- EP$n$s protected by topology that are prohibited at the non-interacting level. Specifically, we demonstrate that both bosonic ...
Enhancing collective spin squeezing via one-axis twisting echo control of individual atoms
Zhiwei Hu, Youwei Zhang, Junlei Duan +2 more·Feb 15, 2026
Spin squeezing generated via inter-atom entanglement in multilevel atomic ensembles provides a powerful resource for quantum-enhanced metrology. Existing schemes that harness internal atomic degrees of freedom to boost squeezing typically encode the ...
Semiclassical Simulation of Homogeneous Emitter Ensembles with Local Dissipation
Lewis Ruks·Feb 15, 2026
Emitter ensembles constitute a fundamental component in quantum optical technologies, yet efficient and accurate simulation of large ensembles remains challenging. Here, we formulate a truncated Wigner approximation (TWA) for permutation-invariant em...
Phase sensitive topological classification of single-qubit measurements in linear cluster states
Sougata Bhattacharyya, Sovik Roy·Feb 15, 2026
We provide an explicit geometric classification of single-qubit projective measurements on one-dimensional linear cluster states within a topological framework. By establishing an explicit geometrical correspondence between local measurements and top...
Wideband Quantum Transduction for Rydberg Atomic Receivers Using Six-Wave Mixing
Yuanbin Chen, Chau Yuen, Chong Meng Samson See·Feb 15, 2026
Rydberg atomic receivers hold extremely high sensitivity to electric fields, yet their effective 3-dB baseband bandwidth under conventional electromagnetically induced transparency (EIT) is typically constrained to tens to a few hundreds of kilohertz...
Homodyne Detection of Temporally Resolved Quantum States
Owen Sandner, Brendan Mackey, Yuyang Liu +2 more·Feb 15, 2026
We present an analysis of the time domain measurement of temporally resolvable quantum states using balanced homodyne detection. Our approach outlines a formalism of detecting quantum states in arbitrary temporal modes via projection of the temporal ...
Probabilistic approximate optimization using single-photon avalanche diode arrays
Ziyad Alswaidan, Abdelrahman S. Abdelrahman, Md Sakibur Sajal +9 more·Feb 15, 2026
Combinatorial optimization problems are central to science and engineering and specialized hardware from quantum annealers to classical Ising machines are being actively developed to address them. These systems typically sample from a fixed energy la...
Torsion-Induced Quantum Fluctuations in Metric-Affine Gravity using the Stochastic Variational Method
Tomoi Koide, Armin van de Venn·Feb 14, 2026
This review paper comprehensively examines the influence of spatial torsion on quantum fluctuations from the perspectives of Metric-Affine Gravity (MAG) and the Stochastic Variational Method (SVM). We first outline the fundamental framework of MAG, a...
Decoherence, Perturbations and Symmetry in Lindblad Dynamics
A. Y. Klimenko·Feb 14, 2026
We extend a perturbative Dyson-type treatment and discrete-symmetry constraints from the Schrödinger and von Neumann equations to a dephasing Lindblad framework. This work develops further the odd-symmetric formulation -- based on stochastic realism ...
Bulk-boundary correspondence in topological two-dimensional non-Hermitian systems: Toeplitz operators and singular values
J. Sirker·Feb 14, 2026
In contrast to eigenvalue-based approaches, we formulate the bulk-boundary correspondence for two-dimensional non-Hermitian quadratic lattice Hamiltonians in terms of Toeplitz operators and singular values, which correctly capture the stability, loca...