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Spectroscopy of Interacting Quasiparticles in Trapped Ions

Event Details

Event Dates: 

Tuesday, January 12, 2016 - 2:00pm

Seminar Location: 

  • JILA X317

Speaker Name(s): 

Petar Jurcevic

Speaker Affiliation(s): 

University of Innsbruck
Seminar Type/Subject

Scientific Seminar Type: 

  • JILA Public Seminar

Event Details & Abstract: 

The  static  and  dynamic  properties of  many-body quantum systems are often well described by collective excitations, known as quasiparticles. Engineered quantum systems offer the opportunity to study such emergent phenomena in a precisely controlled and otherwise inaccessible way.  However,  as  these  engineered  systems  become larger and more complex, conventional tomograhic methods for characterising their states and processes soon become either inefficient or of limited applicability. New methods are required to verify what has been built in the laboratory and to study the properties of these fascinating systems.

Here, we present a spectroscopic technique  to  study artificial quantum matter and use it for characterizing quasiparticles in a  many- body atomic system of trapped atomic ions. Our approach is to excite combinations of the system’s fundamental quasiparticle eigenmodes, given by delocalized spin waves. By observing the dynamical response to superpositions of such eigenmodes, we extract the system dispersion relation, magnetic order, and even detect signatures of quasiparticle  interactions.  Our technique  is  not  limited  to  trapped  ions,  and  it  is suitable for verifying quantum simulators by tuning them into regimes where the collective excitations have a simple form.

P. Jurcevic, P. Hauke, C. Maier, C. Hempel, B. P. Lanyon, R. Blatt, and C. F.Roos, Phys. Rev. Lett. 115, 100501 (2015)