Experimental implementation of quantum gates through actuator qubits

Jingfu Zhang*, Daniel Burgarth, Raymond Laflamme, Dieter Suter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (SciVal)
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Abstract

Universal quantum computation requires the implementation of arbitrary control operations on the quantum register. In most cases, this is achieved by external control fields acting selectively on each qubit to drive single-qubit operations. In combination with a drift Hamiltonian containing interactions between the qubits, this allows the implementation of arbitrary gate operations. Here, we demonstrate an alternative scheme that does not require local control for all qubits: we implement one- and two-qubit gate operations on a set of target qubits indirectly, through a combination of gates on directly controlled actuator qubits with a drift Hamiltonian that couples actuator and target qubits. Experiments are performed on nuclear spins, using radio-frequency pulses as gate operations and magnetic-dipole couplings for the drift Hamiltonian.

Original languageEnglish
Article number012330
Number of pages7
JournalPhysical Review A
Volume91
Issue number1
DOIs
Publication statusPublished - 22 Jan 2015

Keywords

  • NUCLEAR-MAGNETIC-RESONANCE
  • ERROR-CORRECTING CODE
  • WEAK FERROMAGNETISM
  • SPIN
  • COMPUTATION
  • INFORMATION
  • DIAMOND
  • COMPUTERS
  • DYNAMICS

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