The phase sensitivity of an SU(1,1) interferometer with coherent and squeezed-vacuum light
New Journal of Physics2014Vol. 16(7), pp. 073020–073020
Citations Over TimeTop 10% of 2014 papers
Abstract
We theoretically study the phase sensitivity of the SU(1,1) interferometer with a coherent light together with a squeezed vacuum input case using the method of homodyne. We find that the homodyne detection has better sensitivity than the intensity detection under this input case. For a certain intensity of coherent light (squeezed light) input, the relative phase sensitivity is not always better with increasing the squeezed strength (coherent light strength). The phase sensitivity can reach the Heisenberg limit only under a certain moderate parameter interval, which can be realized with current experiment ability.
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