Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
A Quantum Range-Doppler Algorithm for Synthetic Aperture Radar Image Formation
Alessandro Giovagnoli, S. Huber, Gerhard Krieger·Apr 29, 2025
Synthetic aperture radar (SAR) is a well established technology in the field of Earth remote sensing. Over the years, the resolution of SAR images has been steadily improving and the pixel count increasing as a result of advances in the sensor techno...
Initialization of Neutral and Charged Exciton Spin States in a Telecom-Emitting Quantum Dot
Giora Peniakov, J. Michl, Mohamed Helal +6 more·Apr 29, 2025
Photonic cluster states are highly entangled states that allow for photonic quantum computing and memory-less quantum repeaters. Their generation has been recently demonstrated using semiconductor quantum dots emitting at the 900 nm wavelength range....
Language Model for Large-Text Transmission in Noisy Quantum Communications
Yuqi Li, Zhou Shi, Haitao Ma +3 more·Apr 29, 2025
Quantum communication has the potential to revolutionize information processing, providing unparalleled security and increased capacity compared to its classical counterpart by using the principles of quantum mechanics. However, the presence of noise...
Transversal Gates in Nonadditive Quantum Codes
Chao Zhang, Zipeng Wu, Shilin Huang +1 more·Apr 29, 2025
Transversal gates play a crucial role in suppressing error propagation in fault-tolerant quantum computation, yet they are intrinsically constrained: any nontrivial code encoding a single logical qubit admits only a finite subgroup of $\mathrm{SU}(2)...
Photonic quantum convolutional neural networks with adaptive state injection
Léo Monbroussou, Beatrice Polacchi, Verena Yacoub +14 more·Apr 29, 2025
Abstract. Recent photonic quantum machine learning proposals combined linear optics with adaptivity to enhance expressivity and improve algorithm performance and scalability. The particle-number-preserving property of linear optical platforms was rec...
Variational Quantum Simulation of the Interacting Schwinger Model on a Trapped-Ion Quantum Processor
Christian Melzer, Stephan Schuster, Diego Alberto Olvera Mill'an +4 more·Apr 29, 2025
Simulations in high-energy physics are currently emerging as an application of noisy intermediate-scale quantum (NISQ) computers. In this work, we explore the multi-flavor lattice Schwinger model - a toy model inspired by quantum chromodynamics - in ...
Petz recovery maps of single-qubit decoherence channels in an ion trap quantum processor
Wen-Han Png, Valerio Scarani·Apr 29, 2025
The Petz recovery map provides a near-optimal reversal of quantum noise, yet proposals for its implementation are only recent. We propose a physical realization of the exact state-specific Petz map in an ion trap for qubit decoherence channels. Our c...
CloudQC: A Network-aware Framework for Multi-tenant Distributed Quantum Computing
Ruilin Zhou, Yuhang Gan, Yi Liu +1 more·Apr 29, 2025
Distributed quantum computing (DQC) that allows a large quantum circuit to be executed simultaneously on multiple quantum processing units (QPUs) becomes a promising approach to increase the scalability of quantum computing. It is natural to envision...
Multimode Entangled Squeezed Light Generation and Propagation in a Coupled-Cavity Photonic Crystal
Dylan van Eeden, Marc M. Dignam·Apr 28, 2025
Entangled multi-mode squeezed states of light have a wide variety of applications in quantum information systems, particularly in the generation of non-Gaussian states of light, which are central to continuous-variable quantum computing. Although the...
Fractional Angular Momentum and Quasi-Probability Densities for Angular Degrees of Freedom
Bo-Sture K. Skagerstam, Per K. Rekdal·Apr 28, 2025
In the present update work we consider properly defined two-parameter quasi-probability densities that, e.g., can be used as witness for quantum behaviour for a class of pure states as expressed in terms of a self-adjoint observable angular position ...
The 2D free particle in the phase space quantum mechanics
Hubert Jóźwiak, Jaromir Tosiek·Apr 28, 2025
The Wigner eigenfunctions of a free quantum particle propagating on a plane are derived. Two possibilities are analysed. Firstly, the particle of given energy and angular momentum is discussed. In that case, a special choice of coordinates on the sym...
Emergence of Hermitian topology from non-Hermitian knots
Gaurav Hajong, Ranjan Modak, Bhabani Prasad Mandal·Apr 28, 2025
The non-Hermiticity of the system gives rise to a distinct knot topology in the complex eigenvalue spectrum, which has no counterpart in Hermitian systems. In contrast, the singular values of a non-Hermitian (NH) Hamiltonian are always real by defini...
Generalized pulse design in Floquet engineering: Application to interacting spin systems
Ryan Scott, Bryce Gadway, V. W. Scarola·Apr 28, 2025
Floquet engineering in quantum simulation employs externally applied high-frequency pulses to dynamically design steady-state effective Hamiltonians. Such protocols can be used to enlarge the space of Hamiltonians but approximations often limit pulse...
Roadmap on Quantum Thermodynamics
Steve Campbell, Irene D'Amico, Mario A. Ciampini +66 more·Apr 28, 2025
The last two decades has seen quantum thermodynamics become a well established field of research in its own right. In that time, it has demonstrated a remarkably broad applicability, ranging from providing foundational advances in the understanding o...
Towards Non-Abelian Quantum Signal Processing: Efficient Control of Hybrid Continuous- and Discrete-Variable Architectures
Shraddha Singh, Baptiste Royer, Steven M. Girvin·Apr 28, 2025
Robust quantum control is crucial for achieving operations below the quantum error correction threshold. Quantum Signal Processing (QSP) transforms a unitary parameterized by $θ$ into one governed by a polynomial function $f(θ)$, a feature that under...
Nonstabilizerness generation in a multiparticle quantum walk
Cătălin Paşcu Moca, Doru Sticlet, Balázs Dóra +3 more·Apr 28, 2025
We investigate the generation of non-stabilizerness, or magic, in a multi-particle quantum walk by analyzing the time evolution of the stabilizer Rényi entropy $M_2$. Our study considers both single- and two-particle quantum walks in the framework of...
Impossibility via W states and feasibility via W-like states for perfect quantum teleportation
Sora Kobayashi, Kei-Ichi Kondo·Apr 28, 2025
We examine the two-party perfect quantum teleportation of an unknown 1-qubit state in the case of sharing various 3-qubit entangled states between a sender and a receiver: GHZ state, W state and W-like state. We give an impossibility proof that the W...
Spin-Depairing-Induced Exceptional Fermionic Superfluidity
Soma Takemori, Kazuki Yamamoto, Akihisa Koga·Apr 28, 2025
We investigate the non-Hermitian (NH) attractive Hubbard model with spin depairing, which is a spin-resolved asymmetric hopping that nonreciprocally operates spins in the opposite direction. We find that spin depairing stabilizes a superfluid state u...
Gapped Boundaries of Kitaev's Quantum Double Models: A Lattice Realization of Anyon Condensation from Lagrangian Algebras
Mu Li, Xiao-Han Yang, Xiao-Yu Dong·Apr 28, 2025
The macroscopic theory of anyon condensation, rooted in the categorical structure of topological excitations, provides a complete classification of gapped boundaries in topologically ordered systems, where distinct boundaries correspond to the conden...
A Cautionary Note on Quantum Oracles
Avantika Agarwal, Srijita Kundu·Apr 28, 2025
In recent years, the quantum oracle model introduced by Aaronson and Kuperberg (2007) has found a lot of use in showing oracle separations between complexity classes and cryptographic primitives. It is generally assumed that proof techniques that do ...