Abstract: A quantum emitter (QE) is a physical system that can be used to encode a quantum state via some internal degree of freedom (e.g. exciton, electron spin, valley) and is coupled to light via a dipolar transition that enables the conversion of that quantum state into the state of a photon and vice versa. Such QEs can be applied to sources of single and entangled photons for applications in quantum cryptography or quantum imaging [1,2] and a collection of coupled QEs can be used to realize a small quantum simulator or quantum memory node in a distributed quantum network [3]. Our research group has developed optimal quantum control techniques applicable to solid state emitter systems that rely on optical pulse shape engineering to tailor the light-matter interaction [4,5]. In recent years, we have applied such techniques to semiconductor quantum dots, demonstrating the optimization of the speed and fidelity of quantum state manipulation [6] as well as parallel quantum state rotations on inequivalent emitters using a single laser pulse [7,8]. During this seminar, I will highlight some of our recent experiments providing new insight into electron-phonon coupling in quantum dots and enabling the suppression of phonon-mediated decoherence for telecom-compatible emitters.
Biography: Dr. Kimberley Hall is a Professor of Physics at Dalhousie University. She is director of the Ultrafast Quantum Control Group focused on the study and control of materials of interest for solid-state quantum technology and optoelectronic devices. Dr. Hall held the Canada Research Chair in Ultrafast Science from 2007-2017. Dr. Hall received an undergraduate physics degree from the University of Western Ontario, a Ph.D. in physics from the University of Toronto, and carried out postdoctoral work at the University of Iowa prior to joining Dalhousie University in 2004. Dr. Hall is a pioneer in the understanding of spin relaxation in semiconductor nanostructures and spintronic device innovation, has made significant contributions to the understanding of carrier kinetics in diluted magnetic semiconductors and hybrid organic-inorganic perovskites, and has developed optimal quantum control techniques using femtosecond pulse shaping for application to solid-state quantum emitters.
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2020-01-23T14:00:002020-01-23T15:00:00CM Seminar : Quantum Control of Solid-State Quantum Emitters using Optical Pulse Shape EngineeringEvent Information:
Abstract: A quantum emitter (QE) is a physical system that can be used to encode a quantum state via some internal degree of freedom (e.g. exciton, electron spin, valley) and is coupled to light via a dipolar transition that enables the conversion of that quantum state into the state of a photon and vice versa. Such QEs can be applied to sources of single and entangled photons for applications in quantum cryptography or quantum imaging [1,2] and a collection of coupled QEs can be used to realize a small quantum simulator or quantum memory node in a distributed quantum network [3]. Our research group has developed optimal quantum control techniques applicable to solid state emitter systems that rely on optical pulse shape engineering to tailor the light-matter interaction [4,5]. In recent years, we have applied such techniques to semiconductor quantum dots, demonstrating the optimization of the speed and fidelity of quantum state manipulation [6] as well as parallel quantum state rotations on inequivalent emitters using a single laser pulse [7,8]. During this seminar, I will highlight some of our recent experiments providing new insight into electron-phonon coupling in quantum dots and enabling the suppression of phonon-mediated decoherence for telecom-compatible emitters.
Biography: Dr. Kimberley Hall is a Professor of Physics at Dalhousie University. She is director of the Ultrafast Quantum Control Group focused on the study and control of materials of interest for solid-state quantum technology and optoelectronic devices. Dr. Hall held the Canada Research Chair in Ultrafast Science from 2007-2017. Dr. Hall received an undergraduate physics degree from the University of Western Ontario, a Ph.D. in physics from the University of Toronto, and carried out postdoctoral work at the University of Iowa prior to joining Dalhousie University in 2004. Dr. Hall is a pioneer in the understanding of spin relaxation in semiconductor nanostructures and spintronic device innovation, has made significant contributions to the understanding of carrier kinetics in diluted magnetic semiconductors and hybrid organic-inorganic perovskites, and has developed optimal quantum control techniques using femtosecond pulse shaping for application to solid-state quantum emitters.Event Location:
Brimacombe 311