Yameng Cao

Supervisors: Dr Andrew Shields (Toshiba Research Europe Limited)

Dr Terry Rudolph (Imperial College London)

Semiconductor Quantum Light Sources for Photonic Quantum Computing

Quantum bits or “qubits” can undergo interactions that give them different types of quantum correlations with varying “degree” of correlation between them. These correlations are typically useful for working with quantum computers, in the sense they can be used as a resource, i.e. the more correlations you have, the more quantum logic gates you can implement and thus the more computation you can then perform. Different types of correlations have different purposes and yet only a specific set of these correlations are of special interest to me, because I can manipulate these correlations to become the building blocks of a quantum computer.

My role revolves around using semiconductor devices to produce these special correlations for the grand goal of building a quantum computer. Most of my work is carried out in the Toshiba research laboratories in Cambridge, as this is a collaborative project between Imperial College London and Toshiba Research Europe Ltd.

References:

    1. Y. Cao, A. J. Bennett, I. Farrer, D. A. Ritchie, and A.J. Shields - Polarization-correlated photons from a positively charged quantum dot, (arXiv),  Physical Review B,  2015, accepted on July 16th
    2. Y. Cao, A. J. Bennett, D. J. P. Ellis, I. Farrer, D. A. Ritchie, and A.J. Shields - Ultrafast electrical control of a resonantly driven single photon source, Applied Physics Lett ers, 2014, 105, 051112, August 2014
    3. J. Bennett, M. A. Pooley, Y. Cao, N. Skold, I. Farrer, D. A. Ritchie, A. J. Shields - Voltage tunability of single-spin states in a quantum dot, Nature Communications 4:1522, February 2013
    4. Y. Cao, A. J. Bennett, D. J. P. Ellis, I. Farrer, D. A. Ritchie, and A.J. Shields - Information Coherence in Quantum Dots', Principles and Applications to Control in Quantum Systems  2014, Poster Presentation
    5. Y. Cao, A. J. Bennett, D. J. P. Ellis, I. Farrer, D. A. Ritchie, and A.J. Shields  - Information Coherence in Quantum Dots, Imperial College Postgraduate Symposium 2014,  Seminar Presentation