Abstract
We show that the Bloch oscillation in semiconductor superlattices under the external dc bias is able to generate nonclassical photon states. The time development operator of the photon field in such systems is obtained and is shown to be equivalent approximately to the displacement operator, the phase-quadrature amplitude squeezing operator, or the optical Kerr operator, depending on the external dc bias. Such equivalence is discussed also in terms of Stark-ladder formation.
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