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@ARTICLE{Hassler:279244,
author = {Hassler, Fabian and Catelani, Gianluigi and Bluhm, Hendrik},
title = {{E}xchange interaction of two spin qubits mediated by a
superconductor},
journal = {Physical review / B},
volume = {92},
number = {23},
issn = {1098-0121},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2015-07259},
pages = {235401},
year = {2015},
abstract = {Entangling two quantum bits by letting them interact is the
crucial requirement for building a quantum processor. For
qubits based on the spin of the electron, these two qubit
gates are typically performed by exchange interaction of the
electrons captured in two nearby quantum dots. Since the
exchange interaction relies on tunneling of the electrons,
the range of interaction for conventional approaches is
severely limited as the tunneling amplitude decays
exponentially with the length of the tunneling barrier.
Here, we present an approach to couple two spin qubits via a
superconducting coupler. In essence, the superconducting
coupler provides a tunneling barrier for the electrons which
can be tuned with exquisite precision. We show that as a
result exchange couplings over a distance of several microns
become realistic, thus enabling flexible designs of
multiqubit systems.},
cin = {PGI-2},
ddc = {530},
cid = {I:(DE-Juel1)PGI-2-20110106},
pnm = {144 - Controlling Collective States (POF3-144)},
pid = {G:(DE-HGF)POF3-144},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000365774000006},
doi = {10.1103/PhysRevB.92.235401},
url = {https://juser.fz-juelich.de/record/279244},
}