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Related Experiment Videos

Demonstration of conditional quantum phase shift between ions in a solid.

J J Longdell1, M J Sellars, N B Manson

  • 1Laser Physics Center, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia. jevon.longdell@anu.edu.au

Physical Review Letters
|November 5, 2004
PubMed
Summary

This study demonstrates a conditional phase shift between two europium ion qubits for quantum computing. Electron dipole-dipole interactions were utilized to achieve this quantum gate operation.

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Area of Science:

  • Quantum Information Science
  • Solid-State Physics
  • Atomic, Molecular, and Optical (AMO) Physics

Background:

  • Dopant ions offer long coherence times, making them suitable for scalable solid-state quantum computing.
  • Controlling interactions between qubits is crucial for building quantum processors.

Purpose of the Study:

  • To demonstrate a conditional phase shift gate between two qubits using europium ions.
  • To leverage spectral hole burning and ion interactions for quantum operations.

Main Methods:

  • Utilized ensembles of europium ions selected via spectral hole burning.
  • Employed the electron dipole-dipole interaction for qubit control.
  • Focused on optical transitions of europium ions for qubit manipulation.

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Main Results:

  • Successfully demonstrated a conditional phase shift between two europium ion qubits.
  • Showcased the use of electron dipole-dipole interactions to induce the phase shift.
  • Validated the selection of ion ensembles for enhanced quantum operations.

Conclusions:

  • Europium ion ensembles are viable for implementing quantum gates.
  • The electron dipole-dipole interaction can be harnessed for quantum information processing.
  • This work advances scalable solid-state quantum computing architectures.