Implementation of quantum logic gates using polar molecules in pendular states

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

Research output: Contribution to journalArticle

27 Citations (Scopus)

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.

Original languageEnglish
Article number024104
JournalJournal of Chemical Physics
Volume138
Issue number2
DOIs
Publication statusPublished - 14 Jan 2013
Externally publishedYes

Fingerprint

Quantum computers
quantum computers
Logic gates
logic
Molecules
control theory
Dipole moment
optimal control
Control theory
transition probabilities
molecules
Quenching
dipole moments
quenching
Electric fields
gradients
electric fields
Lasers
lasers
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Implementation of quantum logic gates using polar molecules in pendular states. / Zhu, Jing; Kais, Sabre; Wei, Qi; Herschbach, Dudley; Friedrich, Bretislav.

In: Journal of Chemical Physics, Vol. 138, No. 2, 024104, 14.01.2013.

Research output: Contribution to journalArticle

Zhu, Jing ; Kais, Sabre ; Wei, Qi ; Herschbach, Dudley ; Friedrich, Bretislav. / Implementation of quantum logic gates using polar molecules in pendular states. In: Journal of Chemical Physics. 2013 ; Vol. 138, No. 2.
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