Coupling of nonlocal potentials to electromagnetic fields.

Nonlocal Hamiltonians are used widely in first-principles quantum calculations; the nonlocality stems from eliminating undesired degrees of freedom, e.g., core electrons. To date, attempts to couple nonlocal systems to external electromagnetic (EM) fields have been heuristic or limited to weak or long wavelength fields. Using Feynman path integrals, we derive an exact, closed-form coupling of arbitrary EM fields to nonlocal systems. Our results justify and clarify the couplings used to date and are essential for systematic computation of linear and especially nonlinear responses.

• Publication year

  2001

• Venue

  Physical Review Letters

• Publication date

  2001-01-24

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevLett.87.087402arXiv cond-mat/0101383PMID 11497982
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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