One-dimensional topological superconductors with charge conservation and the gapless Haldane phase

QUEST Center event
No
Speaker
Anna Keselman (Weizmann)
Date
18/05/2017 - 16:30 - 15:30Add to Calendar 2017-05-18 15:30:00 2017-05-18 16:30:00 One-dimensional topological superconductors with charge conservation and the gapless Haldane phase In this talk, I will address the question of the existence of gapless topological superconducting phases in one dimension. I will present a general approach to treat charge-conserving one-dimensional systems with pairing interactions, and argue that in presence of symmetries the notion of a topological phase can be well defined although the system is gapless. I will demonstrate our approach on systems with time-reversal symmetry and on systems with SO(3) symmetry, where a gapless analogue of the Haldane phase in spin-1 chains can be realized. Nanotechnology building (206) - 9th floor המחלקה לפיזיקה physics.dept@mail.biu.ac.il Asia/Jerusalem public
Place
Nanotechnology building (206) - 9th floor
Abstract

In this talk, I will address the question of the existence of gapless topological superconducting phases in one dimension. I will present a general approach to treat charge-conserving one-dimensional systems with pairing interactions, and argue that in presence of symmetries the notion of a topological phase can be well defined although the system is gapless. I will demonstrate our approach on systems with time-reversal symmetry and on systems with SO(3) symmetry, where a gapless analogue of the Haldane phase in spin-1 chains can be realized.

תאריך עדכון אחרון : 11/05/2017