BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-8532
DTSTART:20240425T150000Z
DTEND:20240425T230000Z
DTSTAMP:20260413T223340Z
LAST-MODIFIED:20240422T151130Z
LOCATION:5310 Chamberlin
SUMMARY:Rydberg physics: From Ultralong-Range Molecules to Quantum Sim
 ulation                                 and Quantum Optimization\, R. 
 G. Herb Condensed Matter Seminar\, Peter Schmelcher\, U Hamburg
DESCRIPTION:A review on the most recent activities in Rydberg physics 
 at the
\ncenter for optical quantum technologies will be provided. I s
 tart
\nout with addressing the exotic properties of ultralong-range Ry
 dberg
\nmolecules (ULRM). ULRM possess extreme bond lengths of the ord
 er
\nof several micron and huge dipole moments. Their potential energy
 
\ncurves mimic the highly oscillatory structure of the Rydberg wave 

 \nfunction thereby offering new possibilities for engineering molecula
 r
\nproperties on vastly different time and length scales. Trilobite a
 nd
\nbutterfly states can easily be controlled by weak external electr
 ic
\nor magnetic fields. I demonstrate that synthetic dimensions based
 
\non quantum numbers can be used to design conical intersections and

 \nconsequently non-adiabatic interaction effects in the spectra of
\nU
 LRMs. Ultrafast decay processes are a consequence of these intersectio
 ns.
\nQuenches of external fields then lead to a rich rovibrational
\n
 quantum dynamics of ULRM.
\n
\nThe second part of this talk focuses on
  quantum simulation and
\nquantum optimization. I provide evidence for
  novel quantum phases
\nof strongly interacting many-body Rydberg setu
 ps\, specifically the
\nso-called bond order density wave is unraveled
  and the extended
\ncontrol of Luttinger liquid phases is presented. O
 n the quantum
\noptimization side I describe how a local detuning appr
 oach can
\nenhance the tweezer array-based control of the famous graph
 
\ntheoretical MIS and Max-Cut problems. The traditional order $\\prop
 to N^2$
\napproach is here replaced by a linear system size scaling ap
 proach.
\nFinally\, I will make a short excursion into our recent work
  on
\nsingle atom implementation of integer linear programming. Here\,
 
\na single Rydberg atom will be used to encode linear and even
\nnonl
 inear integer problems which are known to be difficult
\nto solve in a
  classical manner.
\n
URL:https://www.physics.wisc.edu/events/?id=8532
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