Papers

Guan-Jie Fan-Yuan, Yang-Guang Shan, Cong Zhang +10 more·Feb 2, 2026

Determining the position of an entity is a fundamental prerequisite for nearly all activities. Classical means, however, have been proven incapable of providing secure position verification, meaning that a prover can mislead verifiers about its actua...

Kaito Kashiwagi, Akira Matsumura·Feb 2, 2026

We investigate the dissipative dynamics of a two-level atom in a weak gravitational field. Using the Feynman--Vernon influence functional formalism, we derive a quantum master equation describing the two-level atom interacting with a scalar field in ...

Seung Park, Sangjin Lee, Kyunghyun Baek·Feb 2, 2026

Product-formula (PF) based quantum simulation is a promising approach for simulating quantum systems on near-term quantum computers. Achieving a desired simulation precision typically requires a polynomially increasing number of Trotter steps, which ...

Ali Bagci·Feb 2, 2026

Coulomb-Sturmian functions are complete, orthonormal, and include the full spectrum of continuum states. They are restricted to integer values of quantum numbers, as imposed by boundary and orthonormality conditions. Bagci-Hoggan exponential-type orb...

Yuki Kurokawa, Yoshihiko Hasegawa·Feb 2, 2026

Optimal control is a central problem in quantum thermodynamics. When minimizing dissipated work and work fluctuations defined via the two-point measurement scheme in open quantum systems, existing approaches largely focus on the rapid- and slow-drivi...

Shaobo Zhang, Akib Karim, Harry M. Quiney +1 more·Feb 2, 2026

Computing electronic structures of quantum systems is a key task underpinning many applications in photonics, solid-state physics, and quantum technologies. This task is typically performed through iterative algorithms to find the energy eigenstates ...

Tomohiro Nishiyama, Yoshihiko Hasegawa·Feb 2, 2026

In finite-dimensional quantum systems, temperature cannot be uniquely defined. This, in turn, implies that there are several ways to define entropy production in finite-dimensional quantum systems, because the classical entropy production depends on ...

Nobuyuki Okuma·Feb 2, 2026

Non-Hermitian systems have attracted significant theoretical interest due to their extreme properties. However, realizations have mostly been limited to classical applications or artificial setups. In this study, we focus on the quantum nature inhere...

Ruotian Gong, Alex L. Melendez, Guanghui He +3 more·Feb 2, 2026

Spin relaxometry using solid-state spin defects, such as the diamond nitrogen-vacancy (NV) center, probes dynamical processes by measuring how environmental fluctuations enhance the spin relaxation rate. In the weak-coupling limit, relaxation rates s...

Abel C. H. Chen·Feb 2, 2026

In recent years, quantum computing technologies have steadily matured and have begun to find practical applications across various domains. One important area is network communication security, where Quantum Key Distribution (QKD) enables communicati...

Gabriele Carcassi, Christine A. Aidala, Tobias Thrien·Feb 1, 2026

In a previous work we were able to define a non-additive measure that can be used to represent both classical and quantum states in physics. We further extended this idea to work on a generic space of statistical ensembles (i.e. an ensemble space) in...

Georgi Gary Rozenman, Alona Maslennikov, Sara P. Gandelman +5 more·Feb 1, 2026

Satellite-based quantum communications represent a critical advancement in the pursuit of secure, global-scale quantum networks. Leveraging the principles of quantum mechanics, these systems offer unparalleled security through Quantum Key Distributio...

Maximilian L. D. D. Pellner, Georgi Gary Rozenman·Feb 1, 2026

Self-accelerating Airy matter waves offer a clean setting to access the cubic Kennard phase. Here we reconstruct the relative phase of simulated Airy-shaped Bose-Einstein condensates in free space, a regime approached in microgravity, from interferen...

Rafael A. Molina·Feb 1, 2026

Non-Hermitian degeneracies of Lindblad generators (Liouvillian exceptional points) can induce non-exponential relaxation and higher-order poles in dynamical response functions. A collective spin coupled to a polarized Markovian bath exhibits an \emph...

Stuart Ferguson, Petros Wallden·Feb 1, 2026

Optimisation plays a central role in a wide range of scientific and industrial applications, and quantum computing has been widely proposed as a means to achieve computational advantages in this domain. To date, research into the design of noise-resi...

Mei Ian Sam, Tai-Yu Li·Feb 1, 2026

This paper presents an efficient and scalable tensor network framework for quantum kernel circuit simulation, alleviating practical costs associated with increasing qubit counts and data size. The framework enables systematic large-scale evaluation o...

Dimitrios Metaxas·Feb 1, 2026

I review the formalism, Feynman rules, and combinatorics that constrain a field to propagate ``classically", strictly in tree diagrams, either by itself, or interacting with other, purely quantum fields. The perturbation theory is reorganized by virt...

Lin-Yue Luo, Wei-Lin Li, Bao-Ming Xu +1 more·Feb 1, 2026

In this manuscript, we study the quench dynamics of a transverse-field XY model starting from coherent Gibbs states. The results reveal that the initial strength of magnetization plays a crucial role in the emergence of dynamical quantum phase transi...

Akihiro Miyata, Tomonori Ugajin·Feb 1, 2026

According to the island formula, information in the code subspace defined in the black hole interior is embedded in the Hawking radiation after the Page time. At first sight, this embedding suggests that operations acting on the Hawking radiation cou...

Ayanava Dasgupta, Naqueeb Ahmad Warsi, Masahito Hayashi·Feb 1, 2026

We present a unified information-theoretic framework elucidating the interplay between stability, privacy, and the generalization performance of quantum learning algorithms. We establish a bound on the expected generalization error in terms of quantu...