Prospects for quantum computing with an array of ultracold polar paramagnetic molecules

Mallikarjun Karra, Ketan Sharma, Bretislav Friedrich, Sabre Kais, Dudley Herschbach

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Arrays of trapped ultracold molecules represent a promising platform for implementing a universal quantum computer. DeMille [Phys. Rev. Lett. 88, 067901 (2002)] has detailed a prototype design based on Stark states of polar 1Σ molecules as qubits. Herein, we consider an array of polar 2Σ molecules which are, in addition, inherently paramagnetic and whose Hund's case (b) free-rotor pair-eigenstates are Bell states. We show that by subjecting the array to combinations of concurrent homogeneous and inhomogeneous electric and magnetic fields, the entanglement of the array's Stark and Zeeman states can be tuned and the qubit sites addressed. Two schemes for implementing an optically controlled CNOT gate are proposed and their feasibility discussed in the face of the broadening of spectral lines due to dipole-dipole coupling and the inhomogeneity of the electric and magnetic fields.

Original languageEnglish
Article number094301
JournalJournal of Chemical Physics
Volume144
Issue number9
DOIs
Publication statusPublished - 7 Mar 2016
Externally publishedYes

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quantum computation
Molecules
Electric fields
Magnetic fields
molecules
Quantum computers
dipoles
quantum computers
electric fields
Rotors
bells
magnetic fields
rotors
line spectra
eigenvectors
inhomogeneity
platforms
prototypes

ASJC Scopus subject areas

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

Cite this

Prospects for quantum computing with an array of ultracold polar paramagnetic molecules. / Karra, Mallikarjun; Sharma, Ketan; Friedrich, Bretislav; Kais, Sabre; Herschbach, Dudley.

In: Journal of Chemical Physics, Vol. 144, No. 9, 094301, 07.03.2016.

Research output: Contribution to journalArticle

Karra, Mallikarjun ; Sharma, Ketan ; Friedrich, Bretislav ; Kais, Sabre ; Herschbach, Dudley. / Prospects for quantum computing with an array of ultracold polar paramagnetic molecules. In: Journal of Chemical Physics. 2016 ; Vol. 144, No. 9.
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