Sudip Kumar Kar (UJ): Exact Wigner function for chiral spirals

Name: Sudip Kumar Kar (UJ): Exact Wigner function for chiral spirals
Start: 2025-05-16T10:15:00+02:00
End: 2025-05-16T11:00:00+02:00
Location: No location set

Friday May 16, 2025, 10:15 AM → 11:00 AM Europe/Warsaw

Description

Abstract:

The exact solution of the Dirac equation for fermions coupled to an external periodic chiral condensate (chiral spiral) is used to obtain the exact formula for the Wigner function (up to the quantum loop corrections). We find that the resulting expressions for various coefficients of the Wigner function exhibit properties that cannot be reproduced within the standard semiclassical expansion. The formula for the axial vector component of the Wigner function can be used to study spin polarization effects and illustrate connections between the spin density matrix and axial current. In particular, we find that during an adiabatic change of the periodic potential into a uniform one, the polarization vector is twisted from its original direction.

Important: This seminar is held in building D-11 room 104.

Organized by

Prof. dr hab. Wojciech Broniowski (IFJ PAN, UJK)
Prof. dr hab. Danuta Kisielewska (AGH)
Prof. dr hab. inż. Iwona Grabowska-Bołd (AGH)

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Sudip Kumar Kar (UJ): Exact Wigner function for chiral spirals