Zobrazeno 1 - 10
of 6 644
pro vyhledávání: '"Hamiltonians"'
Autor:
Ian Marquette
Publikováno v:
AIMS Mathematics, Vol 9, Iss 10, Pp 26836-26853 (2024)
We provide new insights into the solvability property of a Hamiltonian involving the fourth Painlevé transcendent and its derivatives. This Hamiltonian is third-order shape invariant and can also be interpreted within the context of second supersymm
Externí odkaz:
https://doaj.org/article/4de7d46ad585447b9d1ee211a52840db
Autor:
Roberto Grimaudo
Publikováno v:
Physics, Vol 6, Iss 3, Pp 1111-1123 (2024)
This paper presents a two-qubit model derived from an SU(2)-symmetric 4×4 Hamiltonian. The resulting model is physically significant and, due to the SU(2) symmetry, is exactly solvable in both time-independent and time-dependent cases. Using the for
Externí odkaz:
https://doaj.org/article/6d30d48a058b4bde97f157e9e5ec0a61
Publikováno v:
Magnetism, Vol 4, Iss 3, Pp 183-199 (2024)
Spin models like the Heisenberg Hamiltonian effectively describe the interactions of open-shell transition-metal ions on a lattice and can account for various properties of magnetic solids and molecules. Numerical methods are usually required to find
Externí odkaz:
https://doaj.org/article/ae05edc968014cfeb566545303894c92
Autor:
Ali Al-Bayaty, Marek Perkowski
Publikováno v:
Entropy, Vol 26, Iss 10, p 843 (2024)
A new methodology is introduced to solve classical Boolean problems as Hamiltonians, using the quantum approximate optimization algorithm (QAOA). This methodology is termed the “Boolean-Hamiltonians Transform for QAOA” (BHT-QAOA). Because a great
Externí odkaz:
https://doaj.org/article/da7380c2e0a34258a6fa773f72e45749
Autor:
Aroaldo S. Santos, Pedro H. Pereira, Patrícia P. Abrantes, Carlos Farina, Paulo A. Maia Neto, Reinaldo de Melo e Souza
Publikováno v:
Entropy, Vol 26, Iss 6, p 527 (2024)
In this paper, we present a systematic approach to building useful time-dependent effective Hamiltonians in molecular quantum electrodynamics. The method is based on considering part of the system as an open quantum system and choosing a convenient u
Externí odkaz:
https://doaj.org/article/2588724a8b06420d8aead17f18fcb84b
Publikováno v:
Advanced Electronic Materials, Vol 10, Iss 3, Pp n/a-n/a (2024)
Abstract Non‐Hermitian Hamiltonians may still possess real eigenvalues in case of the existence of parity‐time (PT) symmetry. Exceptional points (EPs) occur at the phase transition from real to complex eigenvalues due to PT‐symmetry breaking in
Externí odkaz:
https://doaj.org/article/3e9ac19fd28f49a89b3b22d15a23d268
Publikováno v:
Symmetry, Vol 16, Iss 7, p 860 (2024)
Time and again, non-conventional forms of Lagrangians with non-quadratic velocity dependence have received attention in the literature. For one thing, such Lagrangians have deep connections with several aspects of nonlinear dynamics including specifi
Externí odkaz:
https://doaj.org/article/33736aa3fa3446dcb2429c7d1fec86a4
Autor:
Lucas Alonso, Guilherme C. Matos, François Impens, Paulo A. Maia Neto, Reinaldo de Melo e Souza
Publikováno v:
Entropy, Vol 26, Iss 3, p 251 (2024)
A mirror subjected to a fast mechanical oscillation emits photons out of the quantum vacuum—a phenomenon known as the dynamical Casimir effect (DCE). The mirror is usually treated as an infinite metallic surface. Here, we show that, in realistic ex
Externí odkaz:
https://doaj.org/article/e3f1e34c464e493bb89f5b93985d056b
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