Precision measurement of electronic ion-ion interactions between neighboring Eu3+ optical centers.
We report measurements of discrete excitation-induced frequency shifts on the 7F0→5D0 transition of the Eu+ center in La:Lu:EuCl3·6D2O resulting from the optical excitation of neighboring Eu3+ ions. Shifts of up to 46.081±0.005  MHz were observed. The magnitude of the interaction between neighboring ions was found to be significantly larger than expected from the electric dipole-dipole mechanism often observed in rare earth systems. We show that a large network of interacting and individually addressable centers can be created by lightly doping crystals otherwise stoichiometric in the optically active rare earth ion, and that this network could be used to implement a quantum processor with more than ten qubits.
Centre for Quantum Computation and Communication Technology, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
R L
RL
Ahlefeldt
Centre for Engineered Quantum Systems, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia.
D L
DL
McAuslan
Jack Dodd Centre for Quantum Technology, Department of Physics, University of Otago, P.O. Box 56, North Dunedin 9016, New Zealand.
J J
JJ
Longdell
Centre for Quantum Computation and Communication Technology, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
N B
NB
Manson
Centre for Quantum Computation and Communication Technology, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
M J
MJ
Sellars