1. Coupling modifies the quantum fluctuations of entangled oscillators
- Author
-
Vinicius S. F. Lisboa and R. B. B. Santos
- Subjects
Physics ,Quantum Physics ,010308 nuclear & particles physics ,General Physics and Astronomy ,FOS: Physical sciences ,Quantum entanglement ,01 natural sciences ,Noise (electronics) ,Metrology ,Momentum ,Coupling (physics) ,Product (mathematics) ,Quantum mechanics ,0103 physical sciences ,010306 general physics ,Quantum Physics (quant-ph) ,Quantum ,Quantum fluctuation - Abstract
Coupled oscillators are among the simplest composite quantum systems in which the interplay of entanglement and interaction may be explored. We examine the effects of coupling on fluctuations of the coordinates and momenta of the oscillators in a single-excitation entangled state. We discover that coupling acts as a mechanism for noise transfer between one pair of coordinate and momentum and another. Through this noise transfer mechanism, the uncertainty product is lowered, on average, relatively to its non-coupled level for one pair of coordinate and momentum and it is enhanced for the other pair. This novel mechanism may be explored in precision measurements in entanglement-assisted sensing and metrology., Comment: 6 pages, 6 figures
- Published
- 2021
- Full Text
- View/download PDF