Quantum States and Hardy’s Formulation of the Uncertainty Principle: a Symplectic Approach |
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Authors: | Maurice de Gosson Franz Luef |
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Institution: | (1) Faculty of Mathematics, University of Vienna, Nordbergstrasse 15, 1090 Vienna, Austria |
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Abstract: | We express the condition for a phase space Gaussian to be the Wigner distribution of a mixed quantum state in terms of the
symplectic capacity of the associated Wigner ellipsoid. Our results are motivated by Hardy’s formulation of the uncertainty
principle for a function and its Fourier transform. As a consequence we are able to state a more general form of Hardy’s theorem.
The authors were supported under the EU-project MEXT-CT-2004-51715. |
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Keywords: | 81S10 81S30 37J05 |
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