, Naval Research Lab
[Host: Eddy Barnes/Paul Fendley]
Optically controlled quantum dots, sometimes referred to as artificial atoms, have been the subject of intense research in recent years. This is due both to their potential role as qubits for quantum computing, and to novel emerging physics, as a result of the interplay of confinement and the semiconductor environment.
In the first part of the talk I will present such an effect, Spontaneously Generated Coherence (SGC), in which spontaneous emission of an excited level results in a coherent superposition of two lower levels. This phenomenon, predicted in the context of atomic physics, is so far unobserved in atoms. I will sketch our theory of SGC in quantum dots and present the experimental results of the first observation of this effect.
In the second part of my talk the focus will be on the design of arbitrary optical spin rotations, which are necessary operations for quantum computing. Simulations show that our approach yields high quality gates, up to two orders of magnitude faster that existing proposals.
Condensed Matter Seminar
Thursday, April 26, 2007
Physics Building, Room 204
Note special time.
Note special room.
To add a speaker, send an email to
Please include the seminar type (e.g. Condensed Matter Seminars), date, name of the speaker, title of talk, and an abstract (if available).