Relativistic Effects in Many-Body Systems

  • Lloyd ArmstrongJr.
Conference paper


The introduction of relativity into many-body systems produces a number of new effects, and a number of new problems. First among the latter might be the difficulty in defining what a “relativistic effect” might be. As we shall discuss below, relativity in a many-body system necessarily implies the use of QED. Thus, any attempt to differentiate between “relativistic effects” and “QED effects” must be rather arbitrary, and not necessarily desirable. At the opposite extreme, many “relativistic effects” can be approximately incorporated into nonrelativistic calculations through introduction of familiar operators such as spin-orbit, spin-other-orbit, etc., into the Schrodinger equation. Thus the wisest procedure seems to be to not specifically define “relativistic effects” at the beginning, but rather to plunge right in and let the discussion itself provide a rough definition.


Relativistic Effect Dirac Equation Oscillator Strength Body Equation Lamb Shift 


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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Lloyd ArmstrongJr.
    • 1
    • 2
  1. 1.Physics DivisionNational Science FoundationUSA
  2. 2.Department of PhysicsJohns Hopkins UniversityBaltimoreUSA

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