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[Fizinfo] Szemináriumok - Seminars: İskender Yalçınkaya

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  • From: Szeminárium koordinátor <sem-admin AT>
  • To: SZFI Szeminárium <seminar AT>,Fizinfo <fizinfo AT>
  • Cc: Fizinfo <fizinfo AT>
  • Subject: [Fizinfo] Szemináriumok - Seminars: İskender Yalçınkaya
  • Date: Thu, 20 Jan 2022 06:00:01 +0100 (CET)
  • Authentication-results: (amavisd-new); dkim=pass (1024-bit key) reason="pass (just generated, assumed good)"

SZFI Seminarİskender YalçınkayaCzech Technical University in Prague (host:
Kiss Tamás)Disorder-free localization in quantum walksTuesday, 25 January
2022, 10:00, Bldg. 1, auditorium,
Meeting ID: 954 6179 7924 Passcode: 956543The phenomenon of localization
usually happens due to the existence of disorder in a medium. Nevertheless,
certain quantum systems allow dynamical localization solely due to the nature
of internal interactions. We study a discrete-time quantum walker which
exhibits disorder-free localization. The quantum walker moves on a
one-dimensional lattice and interacts with on-site spins by coherently
rotating them around a given axis at each step. Since the spins do not have
dynamics of their own, the system poses the local spin components along the
rotation axis as an extensive number of conserved moments. When the
interaction is weak, the spread of the walker shows subdiffusive behaviour
having downscaled ballistic tails in the evolving probability distribution at
intermediate time scales. However, as the interaction gets stronger the
walker gets exponentially localized in the complete absence of disorder in
both lattice and initial state. We investigate the relaxation and
entanglement dynamics of the on-site spins due to their coupling with the
quantum walker. Surprisingly, we find that even in the delocalized regime,
entanglement growth and relaxation occur slowly unlike majority of the other
models displaying a localization transition.&nbsp;Minden érdeklődőt szívesen
látunk! - Everyone is welcome to attend.Róbert Juhászsem-admin AT

  • [Fizinfo] Szemináriumok - Seminars: İskender Yalçınkaya, Szeminárium koordinátor, 01/20/2022

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