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The Entropy Squeezing Properties in a Superposition Stateof Light Field

LU Dao-ming

Published Jan 1, 2004• 0 citations
OpenAlex

Abstract

The entropy squeezing properties in a superposition state of light lield are studied. Its quarature squeezing properties and entropy sqeezing properties are contrasted. It is shown that the entropy squeezing is more sensitive than the quarature squeezing.

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arXiv:1710.08605•Oct 24, 2017•1 citation
The properties of unequal-power Nj-th power H-squeezing of a kind of multimode superposition state light field Ψ(2)〉q with the superposition of two states are studied in detail.It is found that,when the sum of the squeezing orders of each mode is even number,the multimode superposition state light field Ψ(2)〉q is always in Nj minimum uncertainty state;when the sum of the squeezing orders of each mode is odd number,under some conditions the multimode superposition state light field Ψ(2)〉q can also present Nj-th power H-squeezing that changes periodically.
The properties of generalized nonlinear equal power N th power Y sqeezing on multimode superposition state light field ψ (ab) I q are studied,by utilizing the theory of multimode squeezed state.It is found that in the some certain condition,the state ψ (ab) I q can always display the equal power N Y minimum uncertainty state,the state ψ (ab) I q cant display the equal power N th power Y squeezing effect.It is obvious that in the certain condition multimode superposition state light field composed of asymmetrical coherent state light field always keep down the coherent properties of original light lield.
Aim The properties of even-power Y-squeezing in the multimode superposition state light field |Ψ(ab)〉q with the superposition of distinct two quantum states are studied in detail.Methods Account analytical induction and summarization by utilizing the theory of multimode squeezed states.Results The properties of even-power Y-squeezing is found in the multimode superposition state light field |Ψ(ab)〉q.Conclusion The squeezed power number Nj is an even number,under some certain conditions the state |Ψ(ab)〉q can display the effects of even-power Y-squeezing.
The manuscript investigates the entropy squeezing of a qubit (two-level atom) interacting with the cavity field in the Schrödinger cat states. The effects of the Schrödinger cat states of the field on the squeezing are examined. Our results suggest that entropy squeezing is not sensitive to the superposition features of two coherent states of the Schrödinger cat states. Furthermore, it is found that entropy squeezing occurs as the qubit initially close to its maximally coherent state, and the qubit initially in the maximally coherent state can generate optimal squeezing. This also demonstrates that the atomic coherence has a remarkable effect on the atomic squeezing. On the other hand, we also show how the entropy squeezing is related to the intensity of the initial field.