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DTSTAMP:20260404T110316Z
UID:5c1cc2a471dab307890893@ist.ac.at
DTSTART:20190109T100000
DTEND:20190109T110000
DESCRIPTION:Speaker: Hannes Pichler\nhosted by Misha Lemeshko\nAbstract: Th
 e realization of fully controlled\, coherent many-body quantum systems is 
 an outstanding challenge in science and engineering. Quantum optical syste
 ms\, such as photons\, atoms or atoms-like systems\, hold great promises t
 o achieve this goal. With novel tools and functionalities that have been d
 eveloped in recent years\, they allow the realization of quantum simulator
 s\, providing insights into strongly correlated quantum systems\, as well 
 as the implementation of ideas from quantum information science.In this ta
 lk I want to discuss a few examples that highlight how state-of-the-art qu
 antum optical technology can be employed to create highly entangled states
  of atoms or photons and using them for quantum simulation and computing. 
 In the first part of this talk I will discuss the physics of arrays of ind
 ividually trapped Rydberg atoms [1] and the associated quantum many-body p
 henomena. This includes the equilibrium quantum phase diagram in 1D and th
 e universal quantum critical behavior of the various accessible quantum ph
 ase transitions\, as well as novel non-equilibrium phenomena such as quant
 um many-body scars. Moreover I show how these systems can be used to natur
 ally encode combinatorial optimization problems and realize quantum anneal
 ers [2]. In the second part of this talk I want to focus on atom-photon in
 terfaces and present a novel way to create highly entangled states of phot
 ons by sequentially generating and correlating photons using a single quan
 tum emitter in a waveguide QED setting. I will show that using delayed qua
 ntum feedback dramatically expands the class of achievable photonic quantu
 m states in such settings and in particular allows to generate states that
  are universal resources for quantum computation [3]. [1] H. Bernien\, S. 
 Schwartz\, A. Keesling\, H. Levine\, A. Omran\, H. Pichler\, S. Choi\, A. 
 S. Zibrov\, M. Endres\, M. Greiner\, V. Vuleti?\, and M. D. Lukin\, Nature
  551\, 579 (2017).[2] H. Pichler\, S.-T. Wang\, L. Z.\, S. Choi\, M. D. Lu
 kin\, arxiv:1808.10816\, (2018). [3] H. Pichler\, S. Choi\, P. Zoller\, an
 d M. D. Lukin\, PNAS 114\, 201711003 (2017).
LOCATION:Mondi Seminar Room 3\, Central Building\, ISTA
ORGANIZER:tguggenb@ist.ac.at
SUMMARY:Hannes Pichler: From many-body physics to quantum information with 
 atomic and photonic systems
URL:https://talks-calendar.ista.ac.at/events/1712
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