Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Memory and thermal amplification in spin--cavity squared commutators
Yong-Hong Ma, Hui-Hui Xu, Jian-Zhuang Wu +4 more·Jun 26, 2026
Squared commutators in the Holstein--Primakoff limit of a spin--cavity system provide a compact way to separate propagation from covariance growth in a finite-temperature reservoir with memory. In the finite-temperature NMQSD construction, the linear...
Enhancing Quantum Metrology with High-order Fisher Information and Experiments
Xin-Zhu Liu, Jun-Li Jiang, Yan-Han Yang +4 more·Jun 26, 2026
Fisher information plays a central role in statistics and quantum metrology, providing the basis for the celebrated Cramér-Rao bound. In this work, we introduce a new information measure based on higher-order Fisher information and show that it natur...
Scalable Acceleration of Many-Body Quantum Dynamics via Time-Rescaling
Edson B. de Almeida Filho, Ângelo F. da Silva França, Bertúlio de Lima Bernardo·Jun 26, 2026
Fast quantum control is essential to overcome decoherence in contemporary quantum platforms, yet achieving this in many-body systems remains a major challenge. We show that the time-rescaling (TR) method enables efficient acceleration of closed many-...
su(1,1) Symmetry and Exact Solutions of the Dunkl-Klein-Gordon Equation in Higher Dimensions
M. Salazar-Ramírez, B. C. Lütfüoğlu, Jesús Alfredo Martínez-Nuño·Jun 25, 2026
We investigate the $d$-dimensional Dunkl--Klein--Gordon equation for a scalar particle within an algebraic framework. By employing Schrödinger factorization, we construct the generators of the $\mathfrak{su}(1,1)$ algebra and establish the associated...
Vector Representation of Exact Soliton Dynamics in Multi-component Nonlinear Schrödinger Systems
Maxime Foucher, Laurent Delisle, Amine Jaouadi·Jun 25, 2026
Multicomponent nonlinear Schrödinger equations constitute fundamental models for coherent matter waves in multicomponent Bose--Einstein condensates, spinor quantum fluids, and vector nonlinear optical systems. We develop a vector formulation of the H...
Quantum Generative Diffusion Model for Real-World Time Series
Jack Waller, Filippo Caruso, Dimitrios Makris +2 more·Jun 25, 2026
Generative models have achieved remarkable success in data synthesis, though recent advances driven by increasing model scale have introduced challenges in computational cost and efficiency. Quantum machine learning offers a promising alternative, re...
Photon avalanche triggered by a single photon in a bistable nonlinear optical cavity
Asian Selvakumaran, Anna Minguzzi, Iacopo Carusotto +1 more·Jun 25, 2026
We theoretically investigate the response of a coherently-driven nonlinear optical cavity to an additional incident single photon. Using a quantum description of the nonlinear dynamics that fully accounts for the quantum fluctuations of the cavity fi...
I-QMapper: Error-Aware Layout Optimization and Device Diagnostics for NISQ Hardware
Milana Bazayeva, Kenneth Merz·Jun 25, 2026
Achieving high-fidelity execution on noisy intermediate-scale quantum (NISQ) hardware requires careful selection of physical qubit layouts, as gate errors, readout errors, and coherence times vary across the device and drift over time. Currently, qub...
Soft QED as Open Quantum System: Infrared Cancellation and Soft-Shell Coarse Graining
Soo-Jong Rey·Jun 25, 2026
I formulate unresolved soft-photon sector of QED as open quantum system. Resolved charged particles and hard photons form the system, unresolved soft photons form the environment, and basic object is the reduced density matrix. A resolved outcome $f$...
A Quantum Method of Types
Arick Grootveld·Jun 25, 2026
The method of types is a fundamental tool in classical information theory, with applications ranging from composite hypothesis testing and universal source coding to the capacity of arbitrarily varying channels. In this work we introduce an empirical...
Multi-parameter two-photon polarimetry at the quantum limit
Joseph Niblo, Luca Maggio, Russell M. J. Brooks +3 more·Jun 25, 2026
Photonic quantum metrology has demonstrated advantages in precision and resource efficiency for a wide range of applications, with several schemes approaching the fundamental quantum Cramér-Rao precision bound (QCRB). However, the intrinsic incompati...
Engineering of non-Hermitian interactions in digital qudit quantum simulators
Matteo M. Wauters, Paolo Boschetto, Edoardo Ballini +2 more·Jun 25, 2026
Non-Hermitian Hamiltonians are a fascinating class of many-body models that describe the effective dynamics of quantum systems interacting with the environment through particle, energy, or information exchange. Although their theoretical framework is...
Magnetic long-range order at finite temperature in two-dimensional hyperbolic lattices
Alexander Hickey, Joseph Maciejko·Jun 25, 2026
Infrared singularities of gapless Goldstone modes preclude magnetic long-range order at finite temperature in conventional two-dimensional systems. By studying the spin-$S$ Heisenberg model on regular tilings of the hyperbolic plane, we show that thi...
Cultivating logical catalysts for fault-tolerant dyadic phase rotations
Yichen Xu, Xiao Wang·Jun 25, 2026
We introduce a surface-code cultivation protocol for reusable logical catalyst states that implement exact fine dyadic phase gates $Z^{2^{-b}}$ by phase kickback. The catalyst is an eigenstate of a high-period Clifford circuit $U$, with a direct cons...
Exact subsystem dynamics in the deterministic Floquet-PXP model
Katja Klobas·Jun 25, 2026
The dynamics of local subsystems in a thermodynamically large quantum many-body system can be understood as effectively open as the system produces its own effective bath. The action of this bath can be characterised in terms of the so-called influen...
Elimination of Flux Trapping in Superconducting Circuits in Ambient Magnetic Fields
Rohan T. Kapur, Alex Wynn, Sergey K. Tolpygo +10 more·Jun 25, 2026
Superconductor digital electronics and quantum computing with superconducting qubits are promising next-generation computing technologies. When cooled down or operated in the presence of a nonzero background magnetic field $B_r$, superconducting thin...
An Instruction Set Architecture for IMPLY-based Memristive Processing-in-Array
Liam Splittgerber, Fabian Seiler, Nima TaheriNejad·Jun 25, 2026
The push towards expanded ultra-low-power edge computing necessitates hardware capable of operating under extremely strict energy constraints. Traditional Complementary Metal-Oxide-Semiconductor (CMOS) microcontrollers are fundamentally limited in th...
Geometric bulk-edge correspondence for $\mathbb{Z}_2$-topological insulators
Alexis Drouot, Jacob Shapiro, Xiaowen Zhu·Jun 25, 2026
Fermionic time-reversal-invariant insulators in two dimensions--class AII in the Kitaev table--come in two topological phases. These phases are characterized by a $\mathbb{Z}_2$-valued invariant, the Fu-Kane-Mele index. We prove a geometric bulk-edge...
Self-Sifting quantum key distribution
Saman Sarshar, Mostafa Annabestani·Jun 25, 2026
In this paper, we introduce a novel two-way quantum key distribution (QKD) protocol in which the sender (Alice) and receiver (Bob) employ one qubit of a maximally entangled Bell state as the quantum channel for key exchange. The protocol incorporates...
Exploring dynamics of individual vortices in a superconductor via a levitated magnetic transducer
Yiqi Wang, Trisha Madhavan, J. DaLi Schaefer +3 more·Jun 25, 2026
Trapped vortices determine fundamental properties of superconductors and play an important role in many practical applications such as magnetic levitation, however their complex dynamics remain poorly understood. Here, we use the mechanical motion of...