08/05/2026
๐ท๏ธ KOLOKIUM FISIKA KUANTUM 12-5-2026
"Miscellaneous contemplations on the dynamics of nonlinear quantum systems"
๐ PEMBICARA:
Prof. Sebastian Deffner
Department of Physics
Quantum Science Institute
University of Maryland Baltimore County (UMBC), USA
๐๏ธ KAPAN?
12 Mei 2026 (Selasa)
8.30-10.00 WIB
๐ก DI MANA?
Online via Zoom meeting:
https://bit.ly/kolokium-20260512
Meeting ID: 95844764627
Passcode: quantum
๐ ABSTRACT:
Quantum mechanics is an inherently linear theory. However, collective effects in many body quantum systems can give rise to effectively nonlinear dynamics. In this talk, we discuss whether and to what extent such nonlinear effects can be exploited to enhance the rate of quantum evolution. To this end, we compute a suitable version of the quantum speed limit for numerical and analytical examples. We find that the quantum speed limit grows with the strength of the nonlinearity, yet it does not trivially scale with the โdegreeโ of nonlinearity. This is then further elaborated on in the context of quantum thermometry. In particular, we show that quantum thermometers that are described by nonlinear Schrรถdinger equations allow for a significantly enhanced precision, that means larger quantum Fisher information. We conclude the discussion by introducing a generalized Landau-Zener model, in which nonlinear dynamics can be leveraged to suppress excitations and coherences of the corresponding linear scenario. As a final result, we show that the nonlinear term in the evolution equation acts like an effective shortcut to adiabaticity for the linear Landau-Zener problem.
๐ CATATAN:
๐ Kolokium ini GRATIS dan TERBUKA untuk umum, terutama mahasiswa, dosen, dan peneliti.
๐ Mohon maaf penyelenggara tidak menyediakan sertifikat.
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