Papers
Live trends in quantum computing research, updated daily from arXiv.
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A Refined Biorthogonal Framework for Non-Hermitian Quantum Theory and Its Application in Dynamical Phase Transition
Fei Wang, Guoying Liang, Zecheng Zhao +1 more·Mar 22, 2026
The description of states and dynamics in non-Hermitian systems is fundamentally linked to the choice of an appropriate theoretical framework--a point of ongoing debate in the field. This work addresses this issue by proposing a consistent formulatio...
Topological Anderson Random Laser
Hang-Zheng Shen, Xian-Hao Wei, Xi-Wang Luo +1 more·Mar 22, 2026
Topological lasers and random lasers embody two contrasting strategies for disorder management in photonics: the former suppresses disorder via protected edge transport, while the latter exploits multiple scattering for feedback. Here, we theoretical...
Geometric Quantum Mechanics in a Symplectic Framework: Metric-Affine Extensions and Deformed Quantum Dynamics
Hoshang Heydari·Mar 22, 2026
We present a geometric formulation of quantum mechanics based on the symplectic structure of the projective Hilbert space. Building upon the standard Kähler framework, we introduce an extension in which the symplectic structure is allowed to couple t...
The non-uniform electron gas
Mihaly A. Csirik, Andre Laestadius·Mar 22, 2026
The non-uniform (or inhomogeneous) electron gas has received much attention in many-body quantum mechanics and quantum chemistry in the early days of density functional theory, mainly as a theoretical device to construct gradient approximations via l...
Contextuality as a Left Adjoint: A Categorical Generation of Orthomodular Structure
Yukio-Pegio Gunji, Yoshihiko Ohzawa, Yuki Tokuyama +2 more·Mar 22, 2026
Contextuality is widely regarded as a hallmark of quantum information, yet its structural origin is often obscured by probabilistic or operational formulations. In this work, we show that non-distributive orthomodular structure need not be postulated...
A Grid-Based Quantum Algorithm for the Time-Dependent Simulation of Infrared Spectra
Xiaoning Feng, Arman Nejad, David P. Tew·Mar 22, 2026
We develop a time-dependent, grid-based framework for simulating infrared spectra that is specifically designed for quantum computers. The proposed circuit employs a probabilistic strategy for applying the non-unitary dipole operator and an Split Ope...
Evidential Quantum Vertical Federated Learning
Hao Luo, Zhiyuan Zhai, Qianli Zhou +3 more·Mar 22, 2026
Quantum federated learning (QFL) has recently emerged as a promising paradigm for privacy-preserving collaborative learning, yet most existing studies focus on horizontal federated learning and ignore the vertical federated learning (VFL), where part...
Robust Quantum Sensing via Prethermal Spin Orbits
Enrico Daniel Richter, Ryan J. Smith, Brayden Glockzin +3 more·Mar 22, 2026
Practical performance of quantum sensors is often curtailed by uncontrolled environmental drift (bias-field instability, temperature fluctuations, mechanical vibration), background fields, and imperfect control pulses. This motivates developing physi...
Lie-algebraic incompleteness of symmetry-adapted VQE for non-Abelian molecular point groups
Leon D. da Silva, Marcelo P. Santos·Mar 22, 2026
Symmetry-adapted variational quantum eigensolvers (VQE) based on the Unitary Coupled-Cluster ansatz (SymUCCSD) effectively reduce the parameter count for Abelian molecular point groups, yet they systematically fail for non-Abelian groups without a fu...
Proposal for erasure conversion in integer fluxonium qubits
Jiakai Wang, Raymond A. Mencia, Vladimir E. Manucharyan +1 more·Mar 22, 2026
We propose an erasure conversion scheme on the $|e\rangle-|f\rangle$ and $|g\rangle-|f\rangle$ qubits in integer fluxonium qubits (IFQs), which are both first-order insensitive to $1/f$ flux noise. The $|e\rangle-|f\rangle$ transition is identical to...
Measurement Reduction in Orbital-Optimized Variational Quantum Eigensolver via Orbital Compression
Yanxian Tao, Lingyun Wan, Jie Liu·Mar 22, 2026
The variational quantum eigensolver (VQE) has emerged as one of the leading quantum algorithms for solving electronic structure problems on near-term noisy intermediate-scale quantum devices. However, its practical application to quantum chemistry re...
Super-Klein tunneling in 2D Lorentzian-type barriers in graphene
Alonso Contreras-Astorga, Francisco Correa, Luis Inzunza +2 more·Mar 21, 2026
We introduce a two-dimensional model of spin-1/2 Dirac fermions in graphene subjected to a highly tunable electric field, which exhibits super-Klein tunneling. The electric field can be continuously interpolated between two limiting configurations: a...
Entanglement in a driven two-qubit system coupled to common cavity
Amit Dey·Mar 21, 2026
A system, comprised of a qubit pair coupled to a common cavity, is studied with the aim of establishing qubit entanglement. This study is the sequel of the paper Phys. Rev. A 111, 043705 (2025), where similar model was investigated for an initially v...
Entangled photons from quantum-dot-cavity systems under non-Markovian decoherence by pulsed excitation
Katy Snow, Mauro Paternostro·Mar 21, 2026
Cascaded emission from the biexciton state of a quantum dot results in polarization entangled photon pairs. However, modelling this system becomes challenging when photon emission is cavity-mediated due to the large Hilbert space and non-Markovian na...
Non-Gaussianity from superselection rules
Nicolas Moulonguet, Eloi Descamps, José Lorgeré +3 more·Mar 21, 2026
The quantum theory of the electromagnetic field enables the description of multiphoton states exhibiting nonclassical statistical properties, often reflected in non-Gaussian phase-space distributions. While non-Gaussianity alone does not fully charac...
Geometric Diagnostics of Scrambling-Related Sensitivity in a Bohmian Preparation Space
Stephen Wiggins·Mar 21, 2026
The Out-of-Time-Order Correlator (OTOC) is a standard algebraic diagnostic of quantum information scrambling, but it offers limited direct geometric intuition. In this note, we propose a Bohmian, trajectory-based framework for constructing a geometri...
Collective Dynamics in Circuit Quantum Acoustodynamics with a Macroscopic Resonator
Libo Zhang, Chilong Liu, Guixu Xie +9 more·Mar 21, 2026
Collective dynamics in engineered quantum systems offer a unique and versatile platform for exploring how many-body correlations bridge microscopic entanglement and macroscopic behavior. In this work, we report collective Dicke dynamics of acoustic m...
A Phase-Space Geometric Measure of Magic in Qubit Systems
Soumyojyoti Dutta, Tushar·Mar 21, 2026
Characterizing quantum magic -- the resource enabling computational advantage beyond stabilizer circuits -- is subtle in qubit systems because established measures can give conflicting information about the same state. We introduce C(rho), the l1 dis...
The typicality of symmetry-induced entanglement
Christian Boudreault, Nicolas Levasseur·Mar 21, 2026
In the presence of a globally conserved charge $N$, a natural question is whether a given separable state can be separated into charge-conserving components. We dub this problem the Symmetric Separability Problem (SSP). On random states, the SSP is a...
Simultaneous Detection of High-Dimensional Entanglement for Two Unknown Quantum States
Mao-Sheng Li, Chang-Yue Zhang, Zheng Zheng +7 more·Mar 21, 2026
The state overlap, quantified via $\tr[ρσ]$, is a metric widely used to assess the closeness between two quantum states $ρ$ and $σ$. Although global state overlap alone does not directly capture entanglement properties, we uncover that incorporating ...