Simulations of quantum computation with a molecular ion

Daniel Weidinger, Martin Gruebele

Research output: Contribution to journalArticlepeer-review


The capabilities of a new system for coherent control-intense terahertz light pulses acting on trapped, gas phase D3O+ molecules-are investigated using realistic molecular and pulse parameters. Computer simulations show that a set of three shaped pulses can be used to perform four level (two qubit) quantum computational gates on the inversion-rotation energy levels and read-out the result using degenerate four-wave mixing. Two pulse shaping techniques are employed, one directly shaping a terahertz pulse, and another shaping a visible laser pulse that is rectified by a terahertz antenna. Both are found to be effective for control. Methods for initializing the inversion-rotation wavepacket, making the pulse robust against power variations, maximizing its fidelity to a unitary gate transformation and addressing limitations of energy level connectivity are discussed.

Original languageEnglish (US)
Pages (from-to)139-144
Number of pages6
JournalChemical Physics
Issue number1-3
StatePublished - Jun 23 2008


  • Coherent control
  • DO
  • Hydronium ion
  • Pulse shaping
  • Terahertz

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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