Coupling Modifies the Quantum Fluctuations of Entangled Oscillators

Coupled oscillators are among the simplest composite quantum systems in which interplay of entanglement and interaction may be explored. We examine effects coupling on fluctuations coordinates momenta a single-excitation entangled Bell-like state. discover that acts as mechanism for noise transfer between one pair coordinate momentum another. Through this mechanism, uncertainty product is lowered, average, relatively to its non-coupled level it enhanced other pair. This novel explored precision measurements entanglement-assisted sensing metrology.