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Departmental Colloquium

Title
Phonon-photon entanglement in WSe2 quantum dots  
Guest Speaker
Prof. Ajit Srivastava  
Guest Affiliation
Department of Physics, Emory University, Atlanta, GA  
Host
Prof. Y. Abate  
When
Thursday, September 6, 2018 3:30 pm - 4:30 pm  
Details

Monolayer transition metal dichalcogenides (TMDs), such as WSe2, are atomically thin semiconductors with a "valley" degree of freedom, which can be optically addressed, thus opening up exciting possibilities for "valleytronics". Recently, naturally occurring single quantum emitters, believed to be excitons trapped in shallow potentials, were reported in TMDs. They seem to inherit the valley degree of freedom from the host TMD and owing to their longer lifetimes, appear promising for quantum information processing applications.

In this talk, I will begin by highlighting some unique properties of TMDs excitons which result from the off-Gamma-point origin of the constituent single particle electronic states. After describing the basic properties of quantum dots in TMDs, I will present evidence for quantum entanglement between chiral phonons of the 2D host and single photons emitted from the quantum dots. Finally, I will discuss our future plans for implementing a dynamically tunable array of qubits in pristine TMDs which can serve as an ideal platform for quantum information processing applications and also for understanding fundamental many-body physics.