Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Lower Bounding the Secret Key Capacity of Bosonic Gaussian Channels via Optimal Gaussian Measurements
Giuseppe Ortolano, Stefano Pirandola, Leonardo Banchi·Dec 17, 2025
We find the maximum rate achievable in the private communication over a bosonic quantum channel with a fully Gaussian protocol based on optimal single-mode Gaussian measurements. This rate establishes a lower bound on the secret rate capacity of the ...
QuantGraph: A Receding-Horizon Quantum Graph Solver
Pranav Vaidhyanathan, Aristotelis Papatheodorou, David R. M. Arvidsson-Shukur +3 more·Dec 17, 2025
Dynamic programming is a cornerstone of graph-based optimization. While effective, it scales unfavorably with problem size. In this work, we present QuantGraph, a two-stage quantum-enhanced framework that casts local and global graph-optimization pro...
Energy Inference of Black-Box Quantum Computers Using Quantum Speed Limit
Nobumasa Ishida, Yoshihiko Hasegawa·Dec 17, 2025
Cloud-based quantum computers do not provide users with access to hardware-level information such as the underlying Hamiltonians, which obstructs the characterization of their physical properties. We propose a method to infer the energy scales of gat...
Quadratic Stability of Entropy Minimizers under Block-Separable Convex Constraints
Hassan Nasreddine·Dec 17, 2025
We investigate entropy minimization problems for quantum states subject to convex block-separable constraints. Our principal result is a quantitative stability theorem: under a natural confining (fixed-support) hypothesis, if a state has entropy with...
Benchmarking Atomic Ionization Driven by Strong Quantum Light
Yi-Jia Mao, En-Rui Zhou, Yang Li +2 more·Dec 17, 2025
The recently available high-intensity quantum light pulses provide novel tools for controlling light-matter interactions. However, the rigor of the theoretical frameworks currently used to describe the interaction of strong quantum light with atoms a...
The inverse parametric problem
Michele Cortinovis, Fabio Lingua, David B. Haviland·Dec 17, 2025
We present a method to calculate the frequency components of a pump waveform driving a parametric oscillator, which realizes a desired frequency mixing or scattering between modes. The method is validated by numerical analysis and we study its sensit...
Characterizing Fisher information of quantum measurement
Rakesh Saini, Jukka Kiukas, Daniel Burgarth +1 more·Dec 17, 2025
Informationally complete measurements form the foundation of universal quantum state reconstruction, while quantum parameter estimation is based on the local structure of the manifold of quantum states. Here we establish a general link between these ...
A short history of Quantum Illumination
Marco Genovese, Ivano Ruo-Berchera·Dec 17, 2025
Quantum illumination represents one of the most interesting examples of quantum technologies. On the one hand, it can find significant applications; on the other hand, it is one of the few quantum protocols robust against noise and losses. Here we pr...
Hamiltonian and double-bracket flow formulations of quantum measurements
Aarón Villanueva, Luis Pedro García-Pintos·Dec 17, 2025
We introduce a framework that unifies quantum measurement dynamics, Hamiltonian dynamics, and double-bracket gradient flows. We do so by providing explicit expressions for stochastic Hamiltonians that produce state dynamics identical to those that ha...
Quditto: Emulating and Orchestrating Distributed QKD Network Deployments
Blanca Lopez, Angela Diaz-Bricio, Javier Perez +2 more·Dec 17, 2025
Quantum Key Distribution (QKD) offers information-theoretic security by leveraging quantum mechanics, yet the cost and complexity of dedicated hardware and fiber infrastructure have so far limited large-scale deployment and experimentation. In this p...
Spontaneous wave function collapse from non-local gravitational self-energy
Kimet Jusufi, Douglas Singleton, Francisco S. N. Lobo·Dec 17, 2025
We incorporate non-local gravitational self-energy, motivated by string-inspired T-duality, into the Schrödinger-Newton equation. In this framework spacetime has an intrinsic non-locality, rendering the standard linear superposition principle only an...
Consecutive-gap ratio distribution for crossover ensembles
Gerson C. Duarte-Filho, Julian Siegl, John Schliemann +1 more·Dec 17, 2025
The study of spectrum statistics, such as the consecutive-gap ratio distribution, has revealed many interesting properties of many-body complex systems. Here we propose a two-parameter surmise expression for such distribution to describe the crossove...
Amplitude-amplified coherence detection and estimation
Rhea Alexander, Michalis Skotiniotis, Daniel Manzano·Dec 17, 2025
The detection and characterization of quantum coherence is of fundamental importance both in the foundations of quantum theory as well as for the rapidly developing field of quantum technologies, where coherence has been linked to quantum advantage. ...
A Quantum Bluestein's Algorithm for Arbitrary-Size Quantum Fourier Transform
Nan-Hong Kuo, Renata Wong·Dec 17, 2025
We propose a quantum analogue of Bluestein's algorithm (QBA) that implements an exact $N$-point Quantum Fourier Transform (QFT) for arbitrary $N$. Our construction factors the $N$-dimensional QFT unitary into three diagonal quadratic-phase gates and ...
Wigner Cat Phases: A finely tunable system for exploring the transition to quantum chaos
M. Süzen·Dec 17, 2025
A quantum mechanical setting consisting of a frozen qubit composed with a fully thermalized chaotic system of N states is proposed, with potential relevance to quantum control. Observing the states of the composed system selectively retaining the sta...
Integrated on-chip quantum light sources on a van der Waals platform
Pietro Metuh, Paweł Wyborski, Athanasios Paralikis +4 more·Dec 17, 2025
Scalable photonic quantum information technologies require a platform combining quantum light sources, waveguides, and detectors on a single chip. Here, we introduce a van der Waals platform comprising strain-engineered bilayer WSe$_2$ quantum emitte...
Wave-packet dynamics in pseudo-Hermitian lattices: Coexistence of Hermitian and non-Hermitian wavefronts
Alon Beck, Moshe Goldstein·Dec 17, 2025
This paper investigates wave-packet dynamics in non-Hermitian lattice systems and reveals a surprising phenomenon: The simultaneous propagation of two distinct wavefronts, one traveling at the non-Hermitian velocity and the other at the Hermitian vel...
Practical Challenges in Executing Shor's Algorithm on Existing Quantum Platforms
Paul Bagourd, Julian Jang-Jaccard, Vincent Lenders +3 more·Dec 17, 2025
Quantum computers pose a fundamental threat to widely deployed public-key cryptosystems, such as RSA and ECC, by enabling efficient integer factorization using Shor's algorithm. Theoretical resource estimates suggest that 2048-bit RSA keys could be b...
Continuous-mode analysis for practical continuous-variable quantum key distribution
Yanhao Sun, Jiayu Ma, Xiangyu Wang +3 more·Dec 17, 2025
Continuous-variable quantum key distribution (CV-QKD) enables two remote parties to establish information-theoretically secure keys and offers high practical feasibility due to its compatibility with mature coherent optical communication technologies...
Decoherence in the Pure Dephasing Spin-Boson Model with Hermitian or Non-Hermitian Bath
Yue-Hong Wu, Ning-Hua Tong·Dec 17, 2025
In this paper, we investigate the decoherence of qubit due to its coupling to a Hermitian or a non-Hermitian bath within the pure dephasing spin-boson model. First, using this model, we analytically establish the previously anticipated similarity bet...