The Real Symplectic Groups in Quantum Mechanics and Optics

Details The Real Symplectic Groups in Quantum Mechanics and Optics The Real Symplectic Groups in Quantum Mechanics and Optics

1995-09-05

arxiv.org/abs/quant-ph/9509002v3

Pramana 45 (1995) 471

Physics

Quantum Physics

Review article 43 pages, revtex, no figures, replaced because somefonts were giving problem in autometic ps generation

Scientific paper

10.1007/BF02848172

text of abstract (We present a utilitarian review of the family of matrix groups $Sp(2n,\Re)$, in a form suited to various applications both in optics and quantum mechanics. We contrast these groups and their geometry with the much more familiar Euclidean and unitary geometries. Both the properties of finite group elements and of the Lie algebra are studied, and special attention is paid to the so-called unitary metaplectic representation of $Sp(2n,\Re)$. Global decomposition theorems, interesting subgroups and their generators are described. Turning to $n$-mode quantum systems, we define and study their variance matrices in general states, the implications of the Heisenberg uncertainty principles, and develop a U(n)-invariant squeezing criterion. The particular properties of Wigner distributions and Gaussian pure state wavefunctions under $Sp(2n,\Re)$ action are delineated.)

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