Zero-range potentials for Dirac particles: Bound-state problems - Publikacja - MOST Wiedzy

Wyszukiwarka

Zero-range potentials for Dirac particles: Bound-state problems

Abstrakt

A model in which a massive Dirac particle in $\mathbb{R}^{3}$ is bound by $N\geqslant1$ spatially distributed zero-range potentials is presented. Interactions between the particle and the potentials are modeled by subjecting a particle's bispinor wave function to certain limiting conditions at the potential centers. Each of these conditions is parametrized by a $2\times2$ Hermitian matrix (or, equivalently, a real scalar and a real vector) and mixes the upper and the lower components of the wave function. The problem of determining particle's bound-state eigenenergies is reduced to the problem of finding real zeroes of a determinant of a certain $2N\times2N$ matrix. As the lower component of the particle's wave function is inverse-square singular at each of the potential centers, the wave function itself is not square-integrable. Nevertheless, one can define a scalar pseudo-product with the property that wave functions belonging to different eigenenergies are orthogonal with respect to it. The wave functions may then be normalized so that their self-pseudo-products are plus one, minus one or zero. An auxiliary set of Sturmian functions is constructed and used to derive an explicit representation of particle's matrix Green's function. For illustration purposes, two particular systems are studied in detail:\ 1) a particle bound in a field of a single zero-range potential, 2) a particle bound in a field of two identical zero-range potentials.

Cytowania

  • 0

    CrossRef

  • 0

    Web of Science

  • 0

    Scopus

Słowa kluczowe

Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
ANNALS OF PHYSICS nr 444, strony 168974 - 1-27,
ISSN: 0003-4916
Język:
angielski
Rok wydania:
2022
Opis bibliograficzny:
Szmytkowski R.: Zero-range potentials for Dirac particles: Bound-state problems// ANNALS OF PHYSICS -Vol. 444, (2022), s.168974-1-27
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.aop.2022.168974
Źródła finansowania:
  • Publikacja bezkosztowa
Weryfikacja:
Politechnika Gdańska

wyświetlono 146 razy

Publikacje, które mogą cię zainteresować

Meta Tagi