We show how a squeezed bath can be obtained by means of a suitable feedback of the output signal corresponding to a Quantum Non-Demolition (QND) measurement of an observable. We also show that a quantum non-demolition mediated feedback is able to preserve the interference fringes of the superposition of macroscopically distinguishable quantum states.
Optical feedback from quantum non-demolition measurements: How to realize a measurement apparatus to observe macroscopic quantum coherence
TOMBESI, Paolo;VITALI, David
1995-01-01
Abstract
We show how a squeezed bath can be obtained by means of a suitable feedback of the output signal corresponding to a Quantum Non-Demolition (QND) measurement of an observable. We also show that a quantum non-demolition mediated feedback is able to preserve the interference fringes of the superposition of macroscopically distinguishable quantum states.File in questo prodotto:
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