Papers

Tianchu Li, Andrés Montoya-Castillo·Jul 6, 2026

While complex-pole hierarchical equations of motion (HEOM) have dramatically expanded the reach of numerically exact quantum dynamics simulations of open quantum systems, they suffer from numerical instabilities rooted in the non-Hermitian structure ...

Pradnya Taksande, Jainesh Mehta, Prasanna Chaporkar·Jul 6, 2026

The integration of Non Terrestrial Networks into 5G and beyond cellular systems has introduced a significant paradigm shift, enabling ubiquitous connectivity and extending services to previously unconnected and underserved remote regions. In particul...

Gaurav Sarmah, Ramakrishna Podila·Jul 6, 2026

Finite quantum environments can relax local probes without acting as canonical baths. We study this distinction for a probe qubit coupled to a programmable bath of ($N$) qubits under excitation-number-conserving dynamics. The conserved charge partiti...

Hasna Chnafa, Rachid El Aitouni, Clarence Cortes +2 more·Jul 6, 2026

We present a theoretical study of spin- and valley-resolved quantum transport in monolayer MoS$_2$ under the combined influence of mechanical strain and an external scalar potential, a combination whose simultaneous unexplored. Within an effective ma...

Ruo Kun Cai, Zhi Jiao Deng, Chun Wang Wu +1 more·Jul 6, 2026

Bound states in the continuum (BICs) are counterintuitive localized states that lie within the continuum of extended states. While extensively realized and utilized in classical wave systems, it is still unclear what a close analog of BICs would be, ...

Sunkyu Yu, Xianji Piao, Namkyoo Park·Jul 6, 2026

Strengthening light-matter coupling has become a central challenge in cavity quantum electrodynamics (QED), enabling ultrafast gate operations, qubit protection, and deterministic nonlinear optics. As the coupling increases, even the simplest configu...

Kyuho Kim, Dayeong Lee, Seungkyun Park +3 more·Jul 6, 2026

Graph-theoretic frameworks have been widely employed in quantum physics to address the high-dimensional complexity of quantum systems. Although open quantum dynamics incorporates system-bath coupling via numerous interacting operators, it has been fo...

Rikizo Ikuta, Hirokazu Kobayashi, Hiroki Takahashi·Jul 6, 2026

Coherent perfect absorption (CPA) extinguishes optical fields through interference and dissipation, but conventional implementations rely on material loss that is largely fixed after fabrication. Here we demonstrate all-optically controllable CPA bas...

Santiago Ávila, Marco Enríquez·Jul 6, 2026

Quantum gate teleportation enables distant parties to implement nonlocal quantum operations without physically transferring the participating qubits, making it a promising primitive for distributed quantum computing. We introduce a general framework ...

Juntao Tu, Yuanlong Wang, Shuming Cheng +2 more·Jul 6, 2026

Hamiltonian estimation is an effective approach in studying the structure and dynamical evolution of quantum systems. The difficulty in estimating the Hamiltonian is that an $N$-qubit Hamiltonian has $4^N-1$ unknown parameters, requiring exponentiall...

Ling-Feng Zhang, Wing Chi Yu·Jul 6, 2026

We investigate phase transitions in the extended Su-Schrieffer-Heeger (SSH) model with next-nearest-neighbor hoppings and an imaginary staggered chemical potential. In the presence of small non-Hermiticity, exceptional points emerge in pairs from the...

Leon Adachi, Le Bin Ho·Jul 6, 2026

Quantum networks can exhibit nonclassical correlations that cannot be explained by classical models with independent sources. While the role of entanglement is well understood, the impact of measurement design remains largely unexplored. Here we deve...

Kyoungho Cho, Yu-Seong Jeon, Jinhyoung Lee +1 more·Jul 6, 2026

Expressive parameterized quantum circuits (PQCs) are often designed under a dilemma: the growth of expressibility and entangling power (EP) that improves Hilbert-space coverage is also expected to randomize an ansatz and activate barren-plateau (BP) ...

Ming Zhong, Xiangyu Ren, Jinglei Cheng +2 more·Jul 6, 2026

Quantum compilers play a key role in transforming quantum circuits into lower-cost implementations with improved execution fidelity. This process is commonly guided by circuit-level metrics, such as gate counts and circuit depth. Although compiler pa...

Alice C. Quillen·Jul 6, 2026

With unitary coin operator that is a random matrix drawn from a uniform distribution with respect to the Haar measure, we construct a variant of a discrete quantum random walk using a d-regular undirected connected simple graph. With each step of the...

Katarzyna Siudzińska·Jul 6, 2026

Conical 2-designs are families of positive operators possessing crucial symmetry properties that allow them to efficiently characterize important quantum measures. However, little is known about their general structures and properties. We propose a c...

Shun Kawakami, Mori Watanabe, Takuya Ikuta +1 more·Jul 5, 2026

Quantum conference key agreement (QCKA) enables multiple users to establish a common secret key with information-theoretic security and is regarded as a key primitive for secure communication in future quantum networks. However, practical implementat...

Ilyas Haouam·Jul 5, 2026

In this paper, we study the two-dimensional Schrodinger oscillator within a dynamical noncommutative (DNC) space. By leveraging perturbation theory, we derive the energy eigenvalues and eigenvectors and systematically analyze the effects of both dyna...

Hossein Rangani Jahromi·Jul 5, 2026

We address the ratio between the trace speed and the Hilbert-Schmidt speed for differentiable finite-dimensional quantum states, $\mathcal R=\|\partial_φρ\|_1/\|\partial_φρ\|_2$. Since the tangent $\partial_φρ$ is Hermitian and traceless, $\mathcal R...

A. A. Saharian, G. V. Mirzoyan, V. S. Torosyan·Jul 5, 2026

We investigate how the compactification of some spatial dimensions in Rindler spacetime affects the vacuum expectation values (VEVs) of the field squared and the energy-momentum tensor for a charged scalar field prepared in the Fulling-Rindler vacuum...