Abstract

We investigate the properties of a quantum hybrid opto-mechanical transducer in the context of information thermodynamics, and show that it provides a valuable platform to monitor information-to-energy conversions at the quantum level. An optically active emitter interacts with the electromagnetic field, that plays the role of an out-of-equilibrium heat bath. The bit of information encoded in the emitter is reversibly converted into mechanical energy stored in a nano-resonator whose displacement is measurable in time, offering direct access to the elementary work exchanged. The study of the complete thermodynamical cycle described over a full mechanical period reveals a new type of Landauer’s erasure that produces, instead of costing, work. We finally show that this device can be turned into a powerful heat engine operating at Carnot efficiency.

© 2014 Optical Society of America