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Millimeter wave (mmWave) has been claimed to be the only viable solution for high-bandwidth vehicular communications. However, frequent channel estimation and beamforming required to provide a satisfactory quality of service limits mmWave…

Signal Processing · Electrical Eng. & Systems 2019-09-26 Sina Shaham , Ming Ding , Matthew Kokshoorn , Zihuai Lin , Shuping Dang , Rana Abbas

The Schrieffer-Wolff (SW) method is a version of degenerate perturbation theory in which the low-energy effective Hamiltonian H_{eff} is obtained from the exact Hamiltonian by a unitary transformation decoupling the low-energy and…

Quantum Physics · Physics 2015-05-28 Sergey Bravyi , David DiVincenzo , Daniel Loss

Relaxed random walk (RRW) models of trait evolution introduce branch-specific rate multipliers to modulate the variance of a standard Brownian diffusion process along a phylogeny and more accurately model overdispersed biological data.…

Populations and Evolution · Quantitative Biology 2019-11-15 Alexander A. Fisher , Xiang Ji , Philippe Lemey , Marc A. Suchard

We consider the Cahn-Hilliard (CH) equation with a Burgers-type convective term that is used as a model of coarsening dynamics in laterally driven phase-separating systems. In the absence of driving, it is known that solutions to the…

Pattern Formation and Solitons · Physics 2023-06-13 D. Tseluiko , M. Alesemi , T. -S. Lin , U. Thiele

In this paper we study controlled continuous time random walks (CTRWs) and heuristically derive pay-off function dynamic programming (DP) equations which turn in the limit of standard scaling to fractional Hamilton Jacobi Bellman type…

Optimization and Control · Mathematics 2012-04-05 V. Kolokoltsov , M. Veretennikova

We present an approach for evaluating Wannier functions, offering an alternative perspective on their role in many-body systems. Unlike traditional methods, such as the maximally localized Wannier functions approach, which focuses on…

Strongly Correlated Electrons · Physics 2025-01-09 Matteo Zendra , Fausto Borgonovi , Giuseppe Luca Celardo , Shmuel Gurvitz

Single-qubit gates are in many quantum platforms applied using a linear drive resonant with the qubit transition frequency which is often theoretically described within the rotating-wave approximation (RWA). However, for fast gates on…

We study a tripartite quantum system consisting of a coplanar-waveguide (CPW) resonator and a nanomechanical resonator (NAMR) connected by a flux qubit, where the flux qubit has a large detuning from both resonators. By a unitray…

Quantum Physics · Physics 2015-09-23 Wei Xiong , Da-Yu Jin , Jun Jing , Chi-Hang Lam , J. Q. You

We propose a formulation of full-wavefield inversion (FWI) as a constrained optimization problem, and describe a computationally efficient technique for solving constrained full-wavefield inversion (CFWI). The technique is based on using a…

Geophysics · Physics 2014-10-28 Musa Maharramov , Biondo Biondi

In contextual optimization, a decision-maker leverages contextual information, often referred to as covariates, to better resolve uncertainty and make informed decisions. In this paper, we examine the challenges of contextual…

Optimization and Control · Mathematics 2025-06-26 Tianyu Wang , Ningyuan Chen , Chun Wang

EPR transient nutation spectroscopy is used to measure the effective field (Rabi frequency) for multiphoton transitions in a two-level spin system bichromatically driven by a transverse microwave (MW) field and a longitudinal…

Materials Science · Physics 2007-12-13 A. P. Saiko , G. G. Fedoruk , S. A. Markevich

Connected and automated vehicles (CAVs) have recently gained prominence in traffic research due to advances in communication technology and autonomous driving. Various longitudinal control strategies for CAVs have been developed to enhance…

Systems and Control · Electrical Eng. & Systems 2024-06-25 Jingyuan Zhou , Longhao Yan , Kaidi Yang

We experimentally assess the capabilities of an active, open-loop technique for drag reduction in turbulent wall flows recently introduced by Quadrio et al. [J. Fluid Mech., v.627, 161, (2009)]. The technique consists in generating…

Fluid Dynamics · Physics 2015-05-19 Franco Auteri , Arturo Baron , Marco Belan , Gabriele Campanardi , Maurizio Quadrio

Exploiting unmanned aerial vehicles (UAVs) to execute tasks is gaining growing popularity recently. To solve the underlying task scheduling problem, the deep reinforcement learning (DRL) based methods demonstrate notable advantage over the…

Machine Learning · Computer Science 2023-06-07 Xiao Mao , Zhiguang Cao , Mingfeng Fan , Guohua Wu , Witold Pedrycz

We consider the problem of a qubit driven by a harmonically oscillating external field while it is coupled to a quantum two-level system. We perform a systematic numerical analysis of the problem by varying the relevant parameters. The…

Superconductivity · Physics 2007-05-23 S. Ashhab , J. R. Johansson , Franco Nori

Deep Reinforcement Learning (Deep-RL) techniques for motion control have been continuously used to deal with decision-making problems for a wide variety of robots. Previous works showed that Deep-RL can be applied to perform mapless…

The collective charge density wave (CDW) conduction is modulated by a transverse single-particle current in a transistor-like device. Nonequilibrium conditions in this geometry lead to an exponential reduction of the depinning threshold,…

Strongly Correlated Electrons · Physics 2009-10-31 N. Markovic , M. A. H. Dohmen , H. S. J. van der Zant

Componentwise boosting (CWB), also known as model-based boosting, is a variant of gradient boosting that builds on additive models as base learners to ensure interpretability. CWB is thus often used in research areas where models are…

Computation · Statistics 2021-11-01 Daniel Schalk , Bernd Bischl , David Rügamer

Precise quantum control relies on a deep understanding of the dynamics of quantum systems under external drives. This study investigates the impact of anharmonicity on qubit dynamics under conditions typical for two-qubit entangling gates…

An efficient urban bus control system has the potential to significantly reduce travel delays and streamline the allocation of transportation resources, thereby offering enhanced and user-friendly transit services to passengers. However,…

Systems and Control · Electrical Eng. & Systems 2023-08-17 Qinghui Nie , Jishun Ou , Haiyang Zhang , Jiawei Lu , Shen Li , Haotian Shi
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