The real symplectic groups in quantum mechanics and optics |
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Authors: | Arvind B Dutta N Mukunda R Simon |
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Institution: | (1) Department of Physics, Indian Institute of Science, 560 012 Bangalore, India;(2) Jawaharlal Nehru Centre for Advanced Scientific Research, 560 064 Jakkur, Bangalore, India;(3) Centre for Theoretical Studies and Department of Physics, Indian Institute of Science, 560 012 Bangalore, India;(4) Institute of Mathematical Sciences, C. I. T. Campus, 600 113 Madras, India |
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Abstract: | We present a utilitarian review of the family of matrix groups Sp(2n, ℛ), 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, ℛ). Global decomposition theorems, interesting subgroups and their generators are described. Turning ton-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, ℛ) action are delineated. |
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Keywords: | Symplectic groups symplectic geometry Huyghens kernel uncertainty principle multimode squeezing Gaussian states |
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