TY - JOUR
T1 - A scalable quantum computing platform using symmetric-Top molecules
AU - Yu, Phelan
AU - Cheuk, Lawrence W.
AU - Kozyryev, Ivan
AU - Doyle, John M.
N1 - Publisher Copyright:
© 2019 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
PY - 2019/9/24
Y1 - 2019/9/24
N2 - We propose a new scalable platform for quantum computing (QC)-an array of optically trapped symmetric-Top molecules (STMs) of the alkaline earth monomethoxide (MOCH3) family. Individual STMs form qubits, and the system is readily scalable to 100-1000 qubits. STM qubits have desirable features for QC compared to atoms and diatomic molecules. The additional rotational degree of freedom about the symmetric-Top axis gives rise to closely spaced opposite parity K-doublets that allow full alignment at low electric fields, and the hyperfine structure naturally provides magnetically insensitive states with switchable electric dipole moments. These features lead to much reduced requirements for electric field control, provide minimal sensitivity to environmental perturbations, and allow for 2-qubit interactions that can be switched on at will. We examine in detail the internal structure of STMs relevant to our proposed platform, taking into account the full effective molecular Hamiltonian including hyperfine interactions, and identify useable STM qubit states. We then examine the effects of the electric dipolar interaction in STMs, which not only guide the design of high-fidelity gates, but also elucidate the nature of dipolar exchange in STMs. Under realistic experimental parameters, we estimate that the proposed QC platform could yield gate errors at the 10-3 level, approaching that required for fault-Tolerant QC.
AB - We propose a new scalable platform for quantum computing (QC)-an array of optically trapped symmetric-Top molecules (STMs) of the alkaline earth monomethoxide (MOCH3) family. Individual STMs form qubits, and the system is readily scalable to 100-1000 qubits. STM qubits have desirable features for QC compared to atoms and diatomic molecules. The additional rotational degree of freedom about the symmetric-Top axis gives rise to closely spaced opposite parity K-doublets that allow full alignment at low electric fields, and the hyperfine structure naturally provides magnetically insensitive states with switchable electric dipole moments. These features lead to much reduced requirements for electric field control, provide minimal sensitivity to environmental perturbations, and allow for 2-qubit interactions that can be switched on at will. We examine in detail the internal structure of STMs relevant to our proposed platform, taking into account the full effective molecular Hamiltonian including hyperfine interactions, and identify useable STM qubit states. We then examine the effects of the electric dipolar interaction in STMs, which not only guide the design of high-fidelity gates, but also elucidate the nature of dipolar exchange in STMs. Under realistic experimental parameters, we estimate that the proposed QC platform could yield gate errors at the 10-3 level, approaching that required for fault-Tolerant QC.
KW - Polyatomic molecules
KW - Quantum information
KW - Ultracold molecules
UR - http://www.scopus.com/inward/record.url?scp=85076271918&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85076271918&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/ab428d
DO - 10.1088/1367-2630/ab428d
M3 - Article
AN - SCOPUS:85076271918
SN - 1367-2630
VL - 21
JO - New Journal of Physics
JF - New Journal of Physics
IS - 9
M1 - 093049
ER -