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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-4342
DTSTART:20161201T160000Z
DURATION:PT1H0M0S
DTSTAMP:20240319T060517Z
LAST-MODIFIED:20161125T143335Z
LOCATION:5310 Chamberlin
SUMMARY:Controlling Spin Qubits in Diamond with a Mechanical Resonator
\, R. G. Herb Condensed Matter Seminar\, Evan MacQuarrie\, Cornell Un
iversity
DESCRIPTION:
\nThe spin state of the nitrogen-vacancy (NV) center
in diamond offers a promising platform for the development of quantum
technologies and investigations into spin dynamics at the nanoscale. W
ith lengthy coherence times even at room temperature\, NV centers pres
ent one path towards quantum information in the solid state and enable
precision metrology with atomic scale spatial resolution. The NV cent
er spin state can be coherently manipulated with resonant magnetic fie
lds\, electric fields\, or\, at cryogenic temperatures\, optical field
s. Here\, we demonstrate direct mechanical control of an NV center spi
n by coherently driving magnetically-forbidden spin transitions with t
he resonant lattice strain generated by a bulk-mode mechanical resonat
or [1\,2]. We then employ this mechanical driving to perform continuou
s dynamical decoupling and extend the inhomogeneous dephasing time of
a single NV center spin [3]. Finally\, we experimentally demonstrate t
hat a spin-strain coupling exists within the NV center room temperatur
e excited state and theoretically analyze a dissipative protocol that
uses this newly discovered coupling to cool a mechanical resonator [4]
. The methods of mechanical spin control developed here unlock a new d
egree of freedom within the NV center Hamiltonian that may enable new
sensing modes and could provide a route to diamond-mechanical resonato
r hybrid quantum systems.
\n
\n
\n[1] E. R. MacQuarrie\, e
t al\, Phys. Rev. Lett. 111\, 227602 (2013).
\n
\n[2] E. R. Ma
cQuarrie\, et al\, Optica 2\, 233 (2015).
\n
\n[3] E. R. MacQu
arrie\, et al\, Phys. Rev. B 92\, 224419 (2015).
\n
\n[4] E. R
. MacQuarrie\, et al\, arXiv:1605.07131 (2016).
URL:https://www.physics.wisc.edu/events/?id=4342
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