• Aug 01 2012

    Congratulations to the two SAIP/NITheP Prizewinners!

    SAIP 2012: University of Pretoria - Michael Mwalaba and Garreth Kemp

    Congratulations to Michael and Garreth who respencetively won the "Best Prize for an MSc presentation" and the "Best Prize for a PhD presenation". Both winners have received their R3000 prize money.

    Below is the abstract of the talk given by Garreth Kemp:
    From Large N Anomalous Dimensions to Open Spring Theory Abstract According to the AdS/CFT correspondence, the conformal dimension of an operator in the N = 4 Super Yang-Mills theory is dual to the energy of the corresponding state in IIB string theory on the AdS5 S5 background. In this work, we solve the eigenvalue problem of the one-loop dilatation operator acting on restricted Schur polynomials whose dimension is O(N), where N is large. After diagonalizing this action, the non-planar anomalous dimension spectrum is found to match that of a classical system of oscillating springs between masses. This result provides further support that these field theory operators are dual to excited giant gravitons in the dual string theory.

    Below is some information about Michael Mwalaba and his talk :

    My name is Michael Mwalaba. I am a student at the University of KwaZulu-Natal, pursuing a master of science degree in physics. It is a research degree. This research has been made possible by financial support from the National Institute for Theoretical Physics (NITheP). It is the work of a team of three consisting of my supervisor, Prof. Francesco Petruccione, co-supervisor, Dr. Ilya Sinayskiy, and myself. The recently held 2012 SAIP Conference in Pretoria afforded us an opportunity to present to the audience what we have done so far in my thesis. I must emphasize though that what I presented was just a tip of an ice berg given the time constraint for the oral presentation. So, what I am going to discuss here is an overview of what I presented on Wednesday July 11, 2012 between 17:10hrs and 17:30hrs. Glory to God and thanks to NITheP and SAIP for the award of the "Best MSc Oral Presentation" my presentation scooped.

    As we know, the scientific community is in pursuit of a computer called quantum computer that is capable of handling much bigger tasks and running much faster than the present day classical computers sitting on our desks and laps. Analogous to the bits of a classical computer, qubits are the basic units of information in a quantum computer. However, the qubits are subject to quantum mechanical phenomena such as superposition and entanglement, and the quantum computer exploits these quantum mechanical phenomena to perform operations on data. The quantum computer operates by setting the qubits in a controlled initial state that represents the problem at hand and by manipulating those qubits with a fixed sequence of quantum logic gates. What this means is that the qubits are not isolated but are in direct interaction with each other and with the mode of control. A possible candidate for a qubit is a quantum dot. Therefore, our model can be viewed as a quantum computer chip made up of several quantum dots under illumination of electromagnetic radiation. Confined in the quantum dots are electrons (fermions), and our interest is in the dissipative dynamics of a spinless electron strongly interacting with a finite bath of fermions. The fermionic environment is embedded in a bosonic Markovian bath. We derived the master equation for the fermion interacting with the fermionic bath and, based on this master equation, the reduced dynamics and thermalization of the spinless electron was analyzed.