Microwave Frequency Phononic Classical and Quantum Information Processing Enabled By Strong Electron-Phonon Interactions

In this talk I will discuss my group’s progress toward a new class of classical microwave frequency phononic devices created by heterogeneously integrating semiconductors and piezoelectric materials. The combination of these materials allows for active and non-reciprocal phononic circuit functionalities to be achieved on a single chip, such as amplifiers, isolators, circulators, mixers, and switches. Combined with their ability to perform narrow-band filtering and duplexing, these phononic circuits pave the way for a new era of radio-frequency signal processing on a chip. Then I will describe our recent theoretical and experimental work on giant phononic non-linearities mediated by electron- phonon interactions and how these non-linearities may be leveraged to provide new functionality for quantum information processing with phonons.