Results 41 to 50 of about 74,838 (223)

A Hybrid Semi‐Inverse Variational and Machine Learning Approach for the Schrödinger Equation

Advanced Physics Research, EarlyView.
A hybrid semi‐inverse variational and machine‐learning framework is presented for solving the Schrödinger equation with complex quantum potentials. Physics‐based variational solutions generate high‐quality training data, enabling Random Forest and Neural Network models to deliver near‐perfect energy predictions.
Khalid Reggab, Houssam Eddine Hailouf, Kingsley Onyebuchi Obodo, Mireille Megnidio‐Tchoukouegno, Mohammed Benali Kanoun, Souraya Goumri‐Said   +5 more
wiley   +1 more source

Alternative Algebraic Structures from Bi-Hamiltonian Quantum Systems

, 2005
We discuss the alternative algebraic structures on the manifold of quantum states arising from alternative Hermitian structures associated with quantum bi-Hamiltonian systems.
Marmo, G., Scolarici, G., Simoni, A., Ventriglia, F.   +3 more
core   +2 more sources

Performance improvement of discrete‐time linear‐quadratic regulators applied to uncertain linear systems using the Tikhonov regularization method

Asian Journal of Control, EarlyView.
Abstract The linear‐quadratic regulator (LQR) problem of optimal control of an uncertain discrete‐time linear system (DTLS) is revisited in this paper from the perspective of Tikhonov regularization. We show that an optimally chosen regularization parameter reduces, compared to the classical LQR, the values of a scalar error function, as well as the ...
Fernando Pazos, Amit Bhaya
wiley   +1 more source

Quantum unitary dynamics in cosmological spacetimes

, 2015
We address the question of unitary implementation of the dynamics for scalar fields in cosmological scenarios. Together with invariance under spatial isometries, the requirement of a unitary evolution singles out a rescaling of the scalar field and a ...
Cortez, Jeronimo, Marugan, Guillermo A. Mena, Velhinho, Jose M.   +2 more
core   +1 more source

Quantum Spin Dynamics VIII. The Master Constraint [PDF]

, 2005
Recently the Master Constraint Programme (MCP) for Loop Quantum Gravity (LQG) was launched which replaces the infinite number of Hamiltonian constraints by a single Master constraint.
Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Bratteli O, Cameron P J, Di Bartolo C, Dittrich B, Dittrich B, Dittrich B, Dittrich B, Dittrich B, Dittrich B, Dittrich B, Fleischhack C, Giesel K Thiemann T, Giesel K Thiemann T, Lewandowski J Okolow A Sahlmann H Thiemann T, Okolow A, Okolow A, Potter M D, Reed M, Rovelli C, Rovelli C, Rovelli C, Sahlmann H, Sahlmann H, Sahlmann H Thiemann T, Sahlmann H Thiemann T, Smolin L, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thomas Thiemann   +48 more
core   +3 more sources

Rising Strong: Cultivating Resilience in Edible City Entrepreneurship. Insights Into the Landscape of Urban Food Initiatives

Business Strategy and the Environment, EarlyView.
ABSTRACT In response to growing global challenges, this study explores how social entrepreneurship within the Edible City movement contributes to building resilient, sustainable, and equitable urban food systems. Drawing on semistructured interviews with over 70 stakeholders across five cities—Berlin, Andernach, Oslo, Rotterdam, and Havana—we ...
Ina Säumel, Stephanie Ligan, Alice Bischof, Edi Emilov Ivanov, Laura Martinez‐Izquierdo, Sara Noémie Plassnig, Marisa Pettit   +6 more
wiley   +1 more source

Emergence of helicity +/- 2 modes (gravitons) from qubit models

, 2010
The general equivalence principle and the associated diffeomorphism gauge symmetry are regarded as a founding principles of nature. But, one may wonder, can diffeomorphism gauge symmetry emerge as a low energy property of certain topological/quantum ...
Aharony, Baskaran, Carlip, Chen, Dass, Dirac, Einstein, Einstein, Fermi, Foerster, Green, Gu, Hastings, Horava, Kaluza, Klein, Kogut, Lee, Levin, Levin, Mannion, Motrunich, Nordstrom, Pauli, Peldan, Polchinski, Regge, Renteln, Rovelli, Smolin, Smolin, Thiemann, Volovik, Waelbroeck, Weinberg, Wen, Wen, Wen, Wen, Wen, Wen, Wen, Weyl, Wu, Xiao-Gang Wen, Xu, Yang, Zhang, Zheng-Cheng Gu   +48 more
core   +1 more source

Market and Nonmarket Strategies in Focus: How Entrepreneurs Tackling the Grand Challenge of Waste Management Navigate Institutional and Market Adversity in Ghana

Business Strategy and the Environment, EarlyView.
ABSTRACT Waste management remains a critical grand challenge in African countries. While entrepreneurship has been a viable strategy for addressing this challenge, it is fraught with constraints. This study investigates the strategies orchestrated by entrepreneurs to navigate adversity in Waste management and ensure the social and economic viability of
Tahiru Azaaviele Liedong, Abiodun Samuel Adegbile, Augustine Awuah Peprah, Bede Akorige Atarah   +3 more
wiley   +1 more source

Klein's programme and Quantum Mechanics

, 2015
We review the geometrical formulation of Quantum Mechanics to identify, according to Klein's programme, the corresponding group of transformations. For closed systems, it is the unitary group.
Clemente-Gallardo, J., Marmo, G.
core   +1 more source

Quantum Processors and Controllers [PDF]

, 2003
In this paper is presented an abstract theory of quantum processors and controllers, special kind of quantum computational network defined on a composite quantum system with two parts: the controlling and controlled subsystems.
Vlasov, Alexander Yu.
core   +5 more sources