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SUMMARY:Quantum Information: How does it μve through fluorides?
DTSTART;VALUE=DATE-TIME:20220831T074000Z
DTEND;VALUE=DATE-TIME:20220831T080000Z
DTSTAMP;VALUE=DATE-TIME:20220826T121321Z
UID:indico-contribution-3623@indico.stfc.ac.uk
DESCRIPTION:Speakers: John Wilkinson (STFC)\nThe unitary evolution of a qu
 antum system preserves its coherence\, but interactions between the system
  and its environment result in decoherence\, a process in which the quantu
 m information stored in the system becomes degraded. A spin-polarized posi
 tively charged muon implanted in a fluoride crystal realizes such a cohere
 nt quantum system\, and the entanglement of muon and nearest-neighbor fluo
 rine nuclear spins gives rise to an oscillatory time dependence of the muo
 n polarization that can be detected and measured. In this talk\, we will s
 how that the decohering effect of more distant nuclear spins can be modell
 ed quantitatively\, allowing a very detailed description of the decoherenc
 e processes coupling the muon-fluorine “system” with its “environmen
 t\,” and allowing us to track the system entropy as the quantum informat
 ion degrades [1]. Examples of this approach to various fluorides will be p
 resented\, using these methods to gain knowledge of the nature of the muon
  stopping site\, distinguish between different crystalline phases of a com
 pound\, and identify Frenkel defects [2].\n\n**References**\n[1] J. M. Wil
 kinson and S. J. Blundell\, *Phys. Rev. Lett.*\, **125** 087201 (2020).\n[
 2] J. M. Wilkinson et al.\, *Phys. Rev. B*\, **89** L220409 (2021).\n\nhtt
 ps://indico.stfc.ac.uk/event/53/contributions/3623/
LOCATION:Science and Technology Campus\, University of Parma
URL:https://indico.stfc.ac.uk/event/53/contributions/3623/
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