In this project we develop a quantum interface between microwave and optical photons as a key enabling technology of a hybrid quantum network. In such a network, the robust optical photons carry quantum information through optical fibres over long distances, while superconducting microwave circuits protected from thermal photon noise by the low temperature environment of a dilution refrigerator function as quantum nodes, providing memory, processing and routing capability. Our work includes developing an integrated, microfabricated device that interfaces the fragile microwave photons and with optical photons through either individual or ensembles of three-level solid-state quantum emitters, such as nitrogen vacancy (NV) centers in diamonds. In addition, we are developing novel quantum memory and repeater designs. Here the device itself could serve as an optical quantum memory, storing information in the ground states where we may perform quantum control via a microwave circuit. It could also serve as a specialized quantum node. Entangling operations between remote superconducting circuits can be performed for repeater operation. Finally, we will also develop an efficient microwave photon detector that works by converting microwave photons into optical photons, which can then be efficiently detected with existing technology.
Quantum Simulation of Strongly Coupled Field Theories
Strongly-coupled field theories describe both fundamental and applied quantum problems.
August 10, 2017
Quantum Computational Resources in the Presence of Symmetry
Summary Fault-tolerance is essential to the performance of quantum technologies, but known schemes are extremely resource intensive. Thus, improving existing schemes or inventing new schemes is of central importance. This joint project is based on the realization that fault-tolerance schemes make use of symmetries in fundamental ways, and that studying the problem of fault tolerance […]
March 13, 2019
Towards large area, resonant quantum tunneling diodes by continuous Langmuir transfer of exfoliated 2D materials
Summary Atomically thin 2D materials constitute promising building blocks for quantum devices due to their exotic, layer-dependent electronic properties. The ability to stack these materials in alternating layers enables heterostructures to be built in almost limitless combinations and over small enough length scales to observe quantum phenomena. So far though, practical implementation of devices based […]
April 1, 2020
Next Generation Quantum Sensors
We are developing new semiconductor p-n junctions and designing novel nanowire arrays that have the potential to significantly enhance the ability to detect light at the single photon level over an unprecedented wavelength range from the ultraviolet to infrared.
June 1, 2017