In this talk I will outline quantum-enhanced sensing modalities for nanoscale displacement and phase
sensing. Optomechanical devices use optical readout of micro/nano-electromechanical systems (MEMS)
displacement in order to transduce displacement and phase signals. New detection modes that focus on
ultrasonic measurements have brought the shot noise of the optical field into play when...
Cavity quantum optomechanics utilizes electromagnetic fields to generate and study quantum states of motion of macroscopic mechanical oscillators. The field has undergone significant growth recently owing to its significant promise for both quantum technology development and to test the foundations of physics. Our new team at Imperial College London - the Quantum Measurement Lab - pursue a...
Naïve semiclassical arguments suggest that the entropy of Hawking radiation should continue to grow even at very late times, a result that is inconsistent with the unitarity of quantum mechanics. In this talk, I will argue that a more careful replica trick calculation shows that the gravitational path integral becomes dominated (at late times) by saddles containing spacetime wormholes. These...
