Proposal for a Phonon Laser Utilizing Quantum-Dot Spin States
Proposal for a Phonon Laser Utilizing Quantum-Dot Spin States
We propose a nanoscale realization of a phonon laser utilizing phonon-assisted spin flips in quantum dots to amplify sound. Owing to a long spin relaxation time, the device can be operated in a strong pumping regime, in which the population inversion is close to its maximal value allowed under Fermi …