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Title: Orbital Angular Momentum of Gauge Fields: Excitation of an Atom by Twisted Photons

Twisted photon states, or photon states with large (> {h_bar}) angular momentum projection in the direction of motion, can photoexcite atomic final states of differing quantum numbers. If the photon symmetry axis coincides with the center of an atom, there are known selection rules that require exact matching between the quantum numbers of the photon and the photoexcited states. The more general case of arbitrarily positioned beams relaxes the selection rules but produces a distribution of quantum numbers of the final atomic states that is novel and distinct from final states produced by plane-wave photons. Numerical calculations are presented using a hydrogen atom as an example.
Authors:
 [1] ;  [2] ;  [3]
  1. George Washington Univ., Washington, DC (United States)
  2. William and Mary College, Williamsburg, VA and JLAB, Newport News, VA (United States)
  3. Indian Institute of Technology, Bombay (India)
Publication Date:
OSTI Identifier:
1116347
Report Number(s):
JLAB-THY--13-1795; DOE/OR--23177-2979
Journal ID: ISSN 2010-1945; TRN: US1400159
DOE Contract Number:
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Journal Name: International Journal of Modern Physics: Conference Series; Journal Volume: 25; Conference: QCD Evolution 2013, Newport News, VA (United States), 6-10 May 2013
Publisher:
World Scientific
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC) (United States)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS