Question

A combined form of this quantity equals one-half for phase space quadratures. States with a value for this quantity below that of the ground state have elliptical phase space distributions that appear “squeezed.” A bound on a combined form of this quantity equals one-half times the norm of the expectation value of a (*) commutator of two operators. (10[1])This quantity for an operator equals the square root of the difference (10[1])between its expectation value squared (10[1])and the square (10[1])of its expectation (10[3])value. (10[1])Because the product of this quantity for x and p is bounded below (10[1])by h-bar over two, (10[1])one can never (10[1])simultaneously know the position (10[2])and momentum of a particle. For 10 points, name this quantity described in a principle derived (10[2])by Heisenberg. (10[5])■END■ (10[12])

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