Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Generalized Gottesman-Kitaev-Preskill States on a Quantum Torus
Sijo K. Joseph, Sudhir Singh·Sep 20, 2025
We introduce a novel formulation of a Generalized Gottesman-Kitaev-Preskill (GKP) state that resolves all of its foundational pathologies, such as infinite energy, non-normalizability, and orthogonality. We demonstrate that these issues are artifacts...
Driving the Unruh Response
Kevin Player·Sep 20, 2025
The Unruh effect, central to quantum field theory in curved spacetime, states that uniformly accelerated observers perceive the Minkowski vacuum as a thermal ensemble of Rindler excitations. Building on this foundation and drawing analogies from sque...
Knowledge Distillation for Variational Quantum Convolutional Neural Networks on Heterogeneous Data
Kai Yu, Binbin Cai, Song Lin·Sep 20, 2025
Distributed quantum machine learning faces significant challenges due to heterogeneous client data and variations in local model structures, which hinder global model aggregation. To address these challenges, we propose a knowledge distillation frame...
On the accuracy of twirled approximations in repeater chains
Bethany Davies, Guus Avis, Stephanie Wehner·Sep 20, 2025
In the performance analysis of quantum networks, it is common to approximate bipartite entangled states as either being Bell-diagonal or Werner states. We refer to these as twirled approximations because it is possible to bring any state to such a fo...
Multipartite quantum entanglement in $\mathcal{PT}$-symmetric molecular optomechanics: Nonreciprocal enhancement and thermal resilience to \SI{500}{\kelvin}
E. Kongkui Berinyuy, C. Tchodimou, P. Djorwé +2 more·Sep 20, 2025
We present a theoretical framework for a $\mathcal{PT}$-symmetric double-cavity molecular optomechanical system demonstrating nonreciprocal enhancement of multipartite quantum entanglement at elevated temperatures. All bipartite entanglement channels...
Auxiliary-qubit-free quantum approximate optimization algorithm for the minimum dominating set problem
Guanghui Li, Xiaohui Ni, Junjian Su +5 more·Sep 20, 2025
Quantum Approximate Optimization Algorithm (QAOA) is a promising framework for solving combinatorial optimization problems on near-term quantum devices. One such problem is the Minimum Dominating Set (MDS), which is known to be NP-hard. Existing QAOA...
Solving Linear Systems of Equations with the Quantum HHL Algorithm: A Tutorial on the Physical and Mathematical Foundations for Undergraduate Students
Lucas Q. Galvão, Anna Beatriz M. de Souza, Alexandre Oliveira S. Santos +2 more·Sep 20, 2025
Quantum computing enables the efficient resolution of complex problems, often outperforming classical methods across various applications. In 2009, Harrow, Hassidim and Lloyd proposed an algorithm for solving linear systems of equations, demonstratin...
Quantum Algorithms for Solving Generalized Linear Systems via Momentum Accelerated Gradient and Schrödingerization
Qitong Hu, Xiaoyang He, Shi Jin +1 more·Sep 20, 2025
In this paper, we propose a quantum algorithm that combines the momentum accelerated gradient method with Schrödingerization [S. Jin, N. Liu and Y. Yu, Phys. Rev. Lett, 133 (2024), 230602][S. Jin, N. Liu and Y. Yu, Phys. Rev. A, 108 (2023), 032603], ...
Two- and three-mode squeezing in a three-qubit entangled system
Joanna K. Kalaga, Jan Perina·Sep 20, 2025
The states of a three-mode bosonic system with the restricted Hilbert space are discussed in the context of quantum entanglement and squeezing of quantum fluctuations. The states exhibiting non-zero tripartite entanglement are considered. Mutual rela...
Geometric Construction of Dynamically Corrected Quantum Gates
Shingo Kukita, Yasushi Kondo·Sep 20, 2025
The foundation of quantum technologies lies in the precise control of quantum systems. It is crucial to implement dynamically corrected quantum gates (DCQG), which compensate for individual quantum gate errors to make them more resilient to errors al...
Relativistic Path-Integral Origin of the Dirac Equation, Quantum Collapse, Decoherence and Non-Hermitian Phenomena
Wei Wen·Sep 20, 2025
Relativity and quantum mechanics are two cornerstones of modern physics, yet their unification within a single-particle path integral and a dynamical explanation of quantum measurement remain unresolved. Historically, these two problems have been tre...
Spontaneous excitation of a centripetally accelerated atom coupled to electromagnetic vacuum fluctuations near a reflecting boundary
Yan Peng, Jiawei Hu, Hongwei Yu·Sep 20, 2025
We investigate the rate of change of the mean atomic energy for centripetally accelerated atoms interacting with electromagnetic vacuum fluctuations near a reflecting boundary, using the Dalibard-Dupont-Roc-Cohen-Tannoudji formalism. The distinct con...
Covert Communication and Key Generation Over Quantum State-Dependent Channels
Hassan ZivariFard, Rémi A. Chou, Xiaodong Wang·Sep 19, 2025
We study covert communication and covert secret key generation with positive rates over quantum state-dependent channels. Specifically, we consider fully quantum state-dependent channels when the transmitter shares an entangled state with the channel...
Locally Purified Maximally Mixed States At Scale: Entanglement Pruning and Symmetries
Amit Jamadagni, Eugene Dumitrescu·Sep 19, 2025
Locally Purified Density Operators (LPDOs) are state-of-the-art tensor network ansatze candidates that efficiently represent mixed quantum states at scale. However, given their non-uniqueness, their representational complexity is generally sub-optima...
Data Complexity: a threshold between Classical and Quantum Machine Learning -- Part I
Christophe Pere·Sep 19, 2025
Quantum machine learning (QML) holds promise for accelerating pattern recognition, optimization, and data analysis, but the conditions under which it can truly outperform classical approaches remain unclear. Existing research often emphasizes algorit...
Subtleties in the pseudomodes formalism
Wynter Alford, Laetitia P. Bettmann, Gabriel T. Landi·Sep 19, 2025
The pseudomode method for open quantum systems, also known as the mesoscopic leads approach, consists in replacing a structured environment by a set of auxiliary "pseudomodes" subject to local damping that approximate the environment's spectral densi...
Multimode Gaussian steady state engineering in optomechanical systems with a squeezed reservoir
Nahid Yazdi, Stefano Zippilli, David Vitali·Sep 19, 2025
We investigate a theoretical protocol for the dissipative stabilization of mechanical quantum states in a multimode optomechanical system composed of multiple optical and mechanical modes. The scheme employs a single squeezed reservoir that drives on...
Unital Kadison-Schwarz Maps
Hajir Al Zadjali, Farrukh Mukhamedov·Sep 19, 2025
Quantum entanglement is an important phenomenon in quantum information theory. To detect entanglement theoretically, positive but not completely positive maps are used. The Kadison-Schwarz (KS) inequality interpolates between positivity and complete ...
Fast momentum-selective transport of Bose-Einstein condensates via controlled non-adiabatic dynamics in optical lattices
Raja Chamakhi, Dana Codruta Marinica, Naceur Gaaloul +2 more·Sep 19, 2025
We present a detailed numerical study of a protocol for momentum-selective transport of a Bose-Einstein condensate (BEC) in a one-dimensional optical lattice, achieving narrow momentum distributions through controlled non-adiabatic dynamics. The prot...
Classical Feedback in a Quantum Network
Elina Levi, Uzi Pereg·Sep 19, 2025
Communication over a quantum multiple access channel (MAC) is considered with classical feedback. Since the no-cloning prohibits universal copying of arbitrary quantum states, classical feedback is generated through measurement. An achievable rate re...