Implementation of quantum logic gates using polar molecules in pendular states

Zhu, Jing; Kais, Sabre; Wei, Qi; Herschbach, Dudley; Friedrich, Bretislav

doi:10.1063/1.4774058

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Implementation of quantum logic gates using polar molecules in pendular states

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Friedrich, Bretislav
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Zhu, J., Kais, S., Wei, Q., Herschbach, D., & Friedrich, B. (2013). Implementation of quantum logic gates using polar molecules in pendular states. The Journal of Chemical Physics, 138(2): 024104. doi:10.1063/1.4774058.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0014-1980-6

Abstract

We present a systematic approach to implementation of basic quantum logic gates operating on polar molecules in pendular states as qubits for a quantum computer. A static electric field prevents quenching of the dipole moments by rotation, thereby creating the pendular states; also, the field gradient enables distinguishing among qubit sites. Multi-target optimal control theory is used as a means of optimizing the initial-to-target transition probability via a laser field. We give detailed calculations for the SrO molecule, a favorite candidate for proposed quantum computers. Our simulation results indicate that NOT, Hadamard and CNOT gates can be realized with high fidelity, as high as 0.985, for such pendular qubit states.