Scaling the neutral atom Rydberg gate quantum computer by collective encoding in Holmium atoms

Details Scaling the neutral atom Rydberg gate quantum computer by collective encoding in Holmium atoms Scaling the neutral atom Rydberg gate quantum computer by collective encoding in Holmium atoms

2008-05-04

arxiv.org/abs/0805.0440v1

Phys. Rev. A 78, 012336 (2008)

Physics

Quantum Physics

6 figures

Scientific paper

10.1103/PhysRevA.78.012336

We discuss a method for scaling a neutral atom Rydberg gate quantum processor to a large number of qubits. Limits are derived showing that the number of qubits that can be directly connected by entangling gates with errors at the $10^{-3}$ level using long range Rydberg interactions between sites in an optical lattice, without mechanical motion or swap chains, is about 500 in two dimensions and 7500 in three dimensions. A scaling factor of 60 at a smaller number of sites can be obtained using collective register encoding in the hyperfine ground states of the rare earth atom Holmium. We present a detailed analysis of operation of the 60 qubit register in Holmium. Combining a lattice of multi-qubit ensembles with collective encoding results in a feasible design for a 1000 qubit fully connected quantum processor.

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