Coherent Control of Molecules for Quantum Computation
Weidinger, Daniel
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https://hdl.handle.net/2142/80598
Description
Title
Coherent Control of Molecules for Quantum Computation
Author(s)
Weidinger, Daniel
Issue Date
2008
Doctoral Committee Chair(s)
Kwiat, Paul
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Molecular
Language
eng
Abstract
Molecules under the inuence of light can be used to perform quantum computational operations when their vibrational or rotational quantum states are coherently controlled. An analysis is presented of quantum computation within the vibrational degrees of freedom of a polyatomic molecule. A set of 2n vibrational states covering a range of energies is used to encode n qubits in place of n separate degrees of freedom. Computer simulations are used to demonstrate the capacity of a shaped laser pulse to execute 4-qubit quantum computational algorithms with high delity on gas phase thiophosgene. An alternative light-molecule system using terahertz pulses on gas phase D3O+ is also analyzed and found to have the capability of performing 2-qubit operations. Simulations of closed loop experiments in coherent control are presented, and elements of the experimental procedure are tested to demonstrate how intramolecular vibrational relaxation (IVR) may be slowed in the ground state vibrational energy levels of gas phase thiophosgene.
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