hide
Free keywords:
Quantum Physics, quant-ph
Abstract:
Coherent quantum noise cancellation (CQNC) can be used in optomechanical
sensors to surpass the standard quantum limit (SQL). In this paper, we
investigate an optomechanical force sensor that uses the CQNC strategy by
cascading the optomechanical system with an all-optical effective negative mass
oscillator. Specifically, we analyze matching conditions, losses and compare
the two possible arrangements in which either the optomechanical or the
negative mass system couples first to light. While both of these orderings
yield a sub-SQL performance, we find that placing the effective negative mass
oscillator before the optomechanical sensor will always be advantageous for
realistic parameters. The modular design of the cascaded scheme allows for
better control of the sub-systems by avoiding undesirable coupling between
system components, while maintaining similar performance to the integrated
configuration proposed earlier. We conclude our work with a case study of a
micro-optomechanical implementation.
