California Institute of Technology
Hybrid Quantum Systems
Quantum information science strives to utilize the fundamental laws of physics to achieve dramatic improvement in communication, computation, and metrology. Existing quantum protocols rely on a wide variety of physical platforms for storing, transferring, and processing of quantum information. Optical photons are the prime carriers of quantum information because of their low loss, large bandwidth of transmission, and resilience to thermal noise. On the contrary, the task of processing quantum information is exceedingly difficult to achieve in the optical regime because of the weakness of the nonlinear interactions between photons. Development of the field of circuit quantum electrodynamics (cQED) in the last decade has provided an intrinsically scalable platform for storing and processing of quantum information with superconducting qubits in the microwave frequency band.
Hybrid quantum systems promise to combine these functionalities in a network where superconducting processing nodes are joined by optical communication links. An integral element in this architecture is a quantum interconnect capable of interfacing the electrical and optical components across an immense frequency gap. I provide a summary of my past and current research involving optical and microwave quantum systems and the interfacing of these platforms using acoustic devices.