Semiclassical theory of non-local statistical measures: residual Coulomb interactions

Abstract

In a recent letter [Phys. Rev. Lett. {\bf 100}, 164101 (2008)] and within the context of quantized chaotic billiards, random plane wave and semiclassical theoretical approaches were applied to an example of a relatively new class of statistical measures, i.e. measures involving both complete spatial integration and energy summation as essential ingredients. A quintessential example comes from the desire to understand the short-range approximation to the first order ground state contribution of the residual Coulomb interaction. Billiards, fully chaotic or otherwise, provide an ideal class of systems on which to focus as they have proven to be successful in modeling the single particle properties of a Landau-Fermi liquid in typical mesoscopic systems, i.e. closed or nearly closed quantum dots. It happens that both theoretical approaches give fully consistent results for measure averages, but that somewhat surprisingly for fully chaotic systems the semiclassical theory gives a much improved approximation for the fluctuations. Comparison of the theories highlights a couple of key shortcomings inherent in the random plane wave approach. This paper contains a complete account of the theoretical approaches, elucidates the two shortcomings of the oft-relied-upon random plane wave approach, and treats non-fully chaotic systems as well.

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References in corpus (8)

• Quantum-to-classical correspondence in open chaotic systems
• BCS theory for finite size superconductors
• Many-Body Physics and Quantum Chaos
• Semiclassical Theory of Bardeen-Cooper-Schrieffer Pairing-Gap Fluctuations
• Landau Fermi Liquid Picture of Spin Density Functional Theory: Strutinsky Approach to Quantum Dots
• Residual Coulomb interaction fluctuations in chaotic systems: the boundary, random plane waves, and semiclassical theory
• Interaction Matrix Element Fluctuations in Ballistic Quantum Dots: Random Wave Model
• Statistics of Wave Functions in Disordered Systems with Applications to Coulomb Blockade Peak Spacing

Cited by in corpus (4)

• Integrating Random Matrix Theory Predictions with Short-Time Dynamical Effects in Chaotic Systems
• Friedel Oscillations in Microwave Billiards
• Fluctuations in classical sum rules
• Interaction Matrix Element Fluctuations in Ballistic Quantum Dots: Dynamical Effects