6 papers
Optimal estimation of time-dependent gravitational fields with quantum optomechanical systems
Sofia Qvarfort, A. Douglas K. Plato, David Edward Bruschi +4
We study the fundamental sensitivity that can be achieved with an ideal optomechanical system in the nonlinear regime for measurements of time-dependent gravitational fields. Using…
Phononic gravity gradiometry with Bose-Einstein condensates
Tupac Bravo, Dennis Rätzel, Ivette Fuentes
Gravity gradiometry with Bose-Einstein condensates (BECs) has reached unprecedented precisions. The basis of this technique is the measurement of differential forces by interferenc…
Optimal estimation with quantum optomechanical systems in the nonlinear regime
Fabienne Schneiter, Sofia Qvarfort, Alessio Serafini +4
We study the fundamental bounds on precision measurements of parameters contained in a time-dependent nonlinear optomechanical Hamiltonian, which includes the nonlinear light-matte…
Time-evolution of nonlinear optomechanical systems: Interplay of mechanical squeezing and non-Gaussianity
Sofia Qvarfort, Alessio Serafini, André Xuereb +3
We solve the time evolution of a nonlinear optomechanical Hamiltonian with arbitrary time-dependent mechanical displacement, mechanical single-mode squeezing and a time-dependent o…
Enhanced continuous generation of non-Gaussianity through optomechanical modulation
Sofia Qvarfort, Alessio Serafini, André Xuereb +2
We study the non-Gaussian character of quantum optomechanical systems evolving under the fully nonlinear optomechanical Hamiltonian. By using a measure of non-Gaussianity based on…
Comment on "Interaction of a Bose-Einstein condensate with a gravitational wave"
Richard Howl, Dennis Rätzel, Ivette Fuentes
A gravitational-wave (GW) detector that utilizes the phononic excitations of a Bose-Einstein condensate (BEC) has recently been proposed [NJP 16, 085003 (2014)]. A subsequent and i…