Treatment of the spectrum of squeezing based on the modes of the universe. II. Applications

Details Treatment of the spectrum of squeezing based on the modes of the universe. II. Applications Treatment of the spectrum of squeezing based on the modes of the universe. II. Applications

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrva..41..381g&link_type=abstract

Physical Review A (Atomic, Molecular, and Optical Physics), Volume 41, Issue 1, January 1, 1990, pp.381-387

Physics

14

Nonclassical States Of The Electromagnetic Field, Including Entangled Photon States, Quantum State Engineering And Measurements

Scientific paper

In the preceding paper we developed a formalism based on the true modes of the universe containing a leaky cavity to analyze the relationship of quantum noise inside that cavity to that outside. We illustrate this formalism here by studying several active systems. We analyze both an ordinary laser and a laser operating in the phase-locked regime. We calculate the extracavity quadrature variances for the phase-locked laser and find that the spectrum of noise reduction in the squeezed quadrature is Lorentzian. Our formalism is also applied to a two-photon correlated-spontaneous-emission laser. We find the familiar result that with 50% squeezing in the phase quadrature of the field inside the cavity, one has nearly 100% phase squeezing outside the cavity. However, under different conditions the phase quadrature of the intracavity field is nearly perfectly squeezed, but the extracavity field shows almost no squeezing in its phase quadrature. We also analyze the effect of finiteness of measurement time on the extracavity quadrature variances.

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