High-fidelity cluster state generation for ultracold atoms in an optical lattice.
Phys Rev Lett
; 112(11): 110501, 2014 Mar 21.
Article
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| MEDLINE
| ID: mdl-24702339
ABSTRACT
We propose a method for generating high-fidelity multipartite spin entanglement of ultracold atoms in an optical lattice in a short operation time with a scalable manner, which is suitable for measurement-based quantum computation. To perform the desired operations based on the perturbative spin-spin interactions, we propose to actively utilize the extra degrees of freedom (DOFs) usually neglected in the perturbative treatment but included in the Hubbard Hamiltonian of atoms, such as, (pseudo-)charge and orbital DOFs. Our method simultaneously achieves high fidelity, short operation time, and scalability by overcoming the following fundamental