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DTSTAMP:20260424T063031Z
UID:62beda6561597982462209@ist.ac.at
DTSTART:20220719T110000
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DESCRIPTION:Speaker: Gregor Jotzu\nhosted by Zhanybek Alpichshev\nAbstract:
  The recent rapid progress in quantum technology has enabled essentially c
 omplete control of the quantum-mechanical state of individual atoms and of
  the interactions between them. Extending this kind of control all the way
  to entire solids is now moving within reach and provides on-demand access
  to high-temperature superconductivity or topologically protected transpor
 t. A crucial tool for achieving such control is the use of coherent drivin
 g with oscillating fields\, known as Floquet engineering. I will first ill
 ustrate the success of this approach using experiments with ultracold atom
 s trapped in crystals made of light. Moving on to real materials\, the str
 ong fields accessible with pulsed lasers are now starting to enable cohere
 nt control of material properties on sub-picosecond time scales. I will sh
 ow how driving graphene can change the topology of its electronic bands\, 
 leading to an ultrafast quantum Hall effect in the absence of a magnetic f
 ield. Furthermore\, I will present how laser pulses can induce metastable 
 superconducting properties in alkali-doped fullerenes at temperatures appr
 oaching room temperature. The process underlying this effect in these orga
 nic materials is not well understood\, but I will present recent progress 
 based on detecting the presence of superconducting fluctuations in the nor
 mal state via the Nernst effect. Pushing this line of research further wil
 l be facilitated by new probing and driving technologies\, such as ultrafa
 st control and detection of magnetic fields or tailoring the spatial symme
 tries of laser fields to perform active symmetry breaking in solids. Ultim
 ately\, this approach can provide new insights on the fundamental question
  of how order forms in complex quantum mechanical systems\, and unlock ult
 rafast on-demand control of new functionalities and phenomena ranging from
  quantum magnetism to topological superconductivity.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Gregor Jotzu: Controlling Quantum Materials Using Coherent Optical 
 Driving
URL:https://talks-calendar.ista.ac.at/events/3852
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