Papers
Live trends in quantum computing research, updated daily from arXiv.
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Partial Differential Equations in the Age of Machine Learning: A Critical Synthesis of Classical, Machine Learning, and Hybrid Methods
M. Nooraiepour, J. Both, T. Kadeethum +1 more·Mar 8, 2026
Partial differential equations (PDEs) govern physical phenomena across the full range of scientific scales, yet their computational solution remains one of the defining challenges of modern science. This critical review examines two mature but episte...
Post-quantum Federated Learning: Secure And Scalable Threat Intelligence For Collaborative Cyber Defense
Prabhudarshi Nayak, G. Thiyagarajan, Ritunsa Mishra +1 more·Mar 8, 2026
Collaborative threat intelligence via federated learning (FL) faces critical risks from quantum computing, which can compromise classical encryption methods. This study proposes a quantum-secure FL framework using post-quantum cryptography (PQC) to p...
Machine Learning Techniques for Enhancing Quantum Key Distribution
Ali Al-Kuwari, Safaa Alqrinawi, Lujayn Al-Amir +2 more·Mar 7, 2026
Quantum Key Distribution (QKD) offers theoretically unbreakable security by leveraging quantum mechanics. However, practical implementation is challenged by environmental vulnerabilities, noise, and hardware imperfections. Recently, Machine Learning ...
paces: Parallelized Application of Co-Evolving Subspaces, a method for computing quantum dynamics on GPUs
R. Kevin Kessing·Mar 7, 2026
An efficient method of computing the dynamics of a pure quantum state under the time-dependent Schrödinger equation is described: At each timestep, a restricted subspace of the potentially infinite-dimensional total Hilbert space is systematically an...
Impact of Layer Structure and Strain on Morphology and Electronic Properties of InAs Quantum Wells on InP (001)
Zijin Lei, Yuze Wu, Christian Reichl +2 more·Mar 7, 2026
High-quality InAs quantum wells grown on InP are a promising platform for topological quantum information processing due to their large g-factor, strong Rashba spin-orbit interaction, and their compatibility with in-situ-deposited superconductors. In...
Uncertainty relations: a small zoo of remarkable inequalities discovered since 1927
V. V. Dodonov·Mar 7, 2026
A concise review of various mathematical formulations of the uncertainty relations in quantum mechanics discovered since 1927 is given. Besides the traditional Heisenberg inequality, the modifications made by Schrödinger and Robertson, as well as gen...
A defect in diamond with millisecond-scale spin relaxation time at room temperature
Sounak Mukherjee, Anran Li, Johannes Eberle +16 more·Mar 7, 2026
Spin defects in diamond are promising platforms for quantum sensing. The longest electron spin relaxation times ($T_1$) at room temperature for solid-state defects are observed in nitrogen vacancy centers in diamond, which can reach 6.67 ms, and subs...
Hybrid light-matter excitations and spontaneous time-reversal symmetry breaking in two-dimensional Josephson Junctions
V. Varrica, G. Falci, E. Paladino +1 more·Mar 7, 2026
In the context of hybrid superconductor-semiconductor systems, Josephson junctions based on two-dimensional materials, such as graphene, offer promising opportunities because of their scalability and gate-tunable electronic properties. In this work, ...
Complexity Bounds for Hamiltonian Simulation in Unitary Representations
Naihuan Jing, Molena Nguyen·Mar 7, 2026
For any unitary representation $ρ$ on a finite-dimensional Hilbert space \(V\) with differential \(dρ: \mathfrak{g} \to \mathfrak{u}(V)\) for the Lie algebra $\mathfrak g$, we consider the Hamiltonian evolution \[ U_X(t) \coloneqq ρ(\exp(tX)) = e^{t\...
Boundary-Driven Exceptional Points in Photonic Waveguide Lattices
Stefano Longhi·Mar 7, 2026
We predict and analyze boundary-driven exceptional points in semi-infinite Hermitian photonic waveguide lattices with a side-coupled defect. The exceptional points arise from coherent reflections at the lattice termination, which induce strong memory...
Thermal Properties of Gauge-Invariant Graphene in Noncommutative Phase-Space
Ilyas Haouam·Mar 7, 2026
We study graphene in an external magnetic field within a noncommutative (NC) framework. A gauge-invariant NC Hamiltonian is derived, and the system is analyzed using the ladder-operator formalism, yielding deformed Landau levels and eigenstates. The ...
Long-time storage of entangled logical states in decoherence-free subspaces
L. Zhang, Y. -L. Xu, Y. -K. Wu +11 more·Mar 7, 2026
The maintenance of quantum entanglement lays the elementary building block of quantum information processing, requiring an integration of long coherence time, sufficient storage capacity, and high-fidelity entangling gates. Here we encode two-qubit e...
On Minimizing Krylov Complexity Using Higher-Order Generators
Saud Čindrak, Kathy Lüdge·Mar 7, 2026
Krylov complexity provides a powerful framework for characterizing the dynamical evolution of quantum systems through the spreading of states in Krylov space. The motivation for this is rooted in the optimality of the Krylov basis for the analyzed co...
Quantum-to-semiclassical Husimi dynamics of non-Hermitian localization transitions
Pallabi Chatterjee, Bhabani Prasad Mandal, Ranjan Modak·Mar 7, 2026
The localization transition in the Hermitian Aubry-André model is known to have a clear classical origin, with the critical point being exactly predictable from an analysis of classical phase-space trajectories. Motivated by this correspondence, we i...
Dynamics of ideal quantum measurement of a spin 1 with a Curie-Weiss magnet
Theodorus Maria Nieuwenhuizen·Mar 7, 2026
Quantum measurement is a dynamical process of an apparatus coupled to a test system. Ideal measurement of the $z$-component of a spin-$\frac{1}{2}$ ($s_z=\pm\frac{1}{2}$) has been modeled by the Curie-Weiss model for quantum measurement. Recently, th...
\textit{Ab Initio} Adiabatic Potential Energy Surfaces and Non-adiabatic Couplings for O$_3$: Construction of Four State Diabatic Hamiltonian
Avik Guchait, Gourhari Jana, Satyam Ravi +2 more·Mar 7, 2026
We compute highly accurate first principle based \textit{ab initio} adiabatic potential energy surfaces (PESs) using State-Averaged Multi-Configurational Self-Consistent Field (SA-MCSCF) followed by internally contracted Multi-Reference Configuration...
Efficiently Learning Global Quantum Channels with Local Tomography
Zidu Liu, Dominik S. Wild·Mar 7, 2026
Scalable characterization of quantum processors is crucial for mitigating noise and imperfections. While randomized measurement protocols enable efficient access to local observables, inferring a globally consistent description of multi-qubit process...
Higgs gap modes in superconducting circuit quantisation
Yun-Chih Liao, Ben J. Powell, Thomas M. Stace·Mar 7, 2026
We extend a recently developed projective circuit quantisation approach to incorporate superconducting Higgs modes associated to gap dynamics. This approach starts from a microscopic fermionic Hamiltonian for mesoscopic superconductors, and projects ...
Quantum criticality in sub-Ohmic systems with three competing terms: beyond conventional spin-boson physics
Nengji Zhou, Yulong Shen, Zhe Sun·Mar 7, 2026
Quantum phase transitions (QPTs) in the spin-boson model with/without the rotating-wave approximation (RWA) are systematically investigated through variational calculations using a sub-Ohmic bath with high spectral density. Four cases involving diffe...
Consistency of Generalised Probabilistic Theories is Undecidable
Serge Massar·Mar 7, 2026
Generalised Probabilistic Theories (GPTs) provide a unifying framework encompassing classical theories, quantum theories, as well as hypothetical alternatives. We investigate the problem of extending a system with a finite set of transformations. We ...