BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-4342
DTSTART:20161201T160000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T050829Z
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:<br>
\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.<br>
\n<br>
\n<br>
\n[1] E. R. MacQuarrie\, e
 t al\, Phys. Rev. Lett. 111\, 227602 (2013).<br>
\n<br>
\n[2] E. R. Ma
 cQuarrie\, et al\, Optica 2\, 233 (2015).<br>
\n<br>
\n[3] E. R. MacQu
 arrie\, et al\, Phys. Rev. B 92\, 224419 (2015).<br>
\n<br>
\n[4] E. R
 . MacQuarrie\, et al\, arXiv:1605.07131 (2016). 
URL:https://www.physics.wisc.edu/events/?id=4342
END:VEVENT
END:VCALENDAR