Venue
Speakers
Abstract
I-HUB QUANTUM TECHNOLOGY FOUNDATION
presents......
I-HUB QTF Quantum Seminar Series
Optical interfaces for quantum communications: frequency multiplexing and hybrid protocols
In entanglement distribution-based quantum repeaters, one of the key resources is optically mediated entanglement between distant qubits which can be addressed and controlled individually. Next to optical quantum memories, most quantum repeater architectures also require multiplexed sources of photon pairs and photon detection mechanisms that can distinguish between the multiplexed modes. The speaker will present the development of a novel alignment-free, frequency multiplexed photon pair source that is based on fiber-pigtailed, cavity-enhanced spontaneous parametric down-conversion (SPDC) in a nonlinear crystal and is easy to integrate with a practical quantum repeater.
Dr. Chakraborty will also present the design and implementation of a novel demultiplexing setup for frequency-resolved detection of the photons. He will show the characterization of multiple pairs of spectrally-resolved modes, as required for a quantum repeater and demonstrate the optical interface of our single photon source with Thulium-based quantum memory. Moreover, he will present hybrid quantum interfaces between nitrogen vacancy (NV) center in diamond-based quantum network nodes and 795 nm photonic time-bin qubits, compatible with thulium and rubidium quantum memories.