### 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 language | English |
---|---|

Article number | 024104 |

Journal | Journal of Chemical Physics |

Volume | 138 |

Issue number | 2 |

DOIs | |

Publication status | Published - 14 Jan 2013 |

Externally published | Yes |

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### ASJC Scopus subject areas

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

### Cite this

*Journal of Chemical Physics*,

*138*(2), [024104]. https://doi.org/10.1063/1.4774058

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

Research output: Contribution to journal › Article

*Journal of Chemical Physics*, vol. 138, no. 2, 024104. https://doi.org/10.1063/1.4774058

}

TY - JOUR

T1 - Implementation of quantum logic gates using polar molecules in pendular states

AU - Zhu, Jing

AU - Kais, Sabre

AU - Wei, Qi

AU - Herschbach, Dudley

AU - Friedrich, Bretislav

PY - 2013/1/14

Y1 - 2013/1/14

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84872744089&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84872744089&partnerID=8YFLogxK

U2 - 10.1063/1.4774058

DO - 10.1063/1.4774058

M3 - Article

C2 - 23320665

AN - SCOPUS:84872744089

VL - 138

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 2

M1 - 024104

ER -