Theoretical seminar. Tagantsev

Prof. Alexander K. Tagantsev (Ioffe Institute, St. Petersburg, and EPFL, Switzerland)  

'Comparing dissipative and dispersive optomechanical couplings: quantummeasurements, stability and light squeezing'
 
Abstract: We analyze a cavity optomechanical setup, in which the position of an oscillatormodulates the internal optical loss.We show that, in contrast to systems with a fixed internal loss,in such a setup, quantum-limited position measurements can be performed and formulate conditions under which itis possible. Additionally, under these conditions the setup exhibits a number of potential benefits forpractical operation, including the complete absence of dynamical backaction and optomechanical instability,rejection of classical laser noise, and thermal fluctuations of cavity frequency from the measurementrecord. We address a few
potential experimental implementations of this setup.