Examples of squeezed coherent states Squeezed coherent state

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as can seen in illustrations, in contrast coherent state, quantum noise squeezed state no longer independent of phase of light wave. characteristic broadening , narrowing of noise during 1 oscillation period can observed. probability distribution of squeezed state defined norm squared of wave function mentioned in last paragraph. corresponds square of electric (and magnetic) field strength of classical light wave. moving wave packets display oscillatory motion combined widening , narrowing of distribution: breathing of wave packet. amplitude-squeezed state, narrow distribution of wave packet reached @ field maximum, resulting in amplitude defined more precisely 1 of coherent state. phase-squeezed state, narrow distribution reached @ field zero, resulting in average phase value better defined 1 of coherent state.


in phase space, quantum mechanical uncertainties can depicted wigner quasi-probability distribution. intensity of light wave, coherent excitation, given displacement of wigner distribution origin. change in phase of squeezed quadrature results in rotation of distribution.








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