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Klaus Mølmer

Quantum control with measurements and quantum Zeno dynamics

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We introduce an efficient iterative method to prepare a target state in Hilbert spaces with high dimensionality using a combination of unitary evolution, measurements, and quantum Zeno dynamics. The latter confines the evolution within Zeno subspaces of decreasing size. This gives an exponential speedup relative to the case of states evolving in the full Hilbert space between projective measurements. We demonstrate our approach on the control problem of rapidly transferring a superfluid into the Mott insulator in the Bose-Hubbard model. We discuss the general applicability of the method by preparing arbitrary superpositions with random Hamiltonians.

OriginalsprogEngelsk
Artikelnummer062317
TidsskriftPhysical Review A
Vol/bind98
Nummer6
Antal sider8
ISSN2469-9926
DOI
StatusUdgivet - 14 dec. 2018

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