Non-hermitian quantum spin liquids

PhD type: 
Doctoral School of Physical Sciences
Year: 
2024/2025/1
Unit: 
Department of Theoretical Physics, Institute of Physics
Address of unit: 
1111 Budapest, Műegyetem rakpart 8.
Description: 

Quantum spin liquids represent exotic states of matter. They do not order down to the lowest of temperatures but are characterized by long range entanglement and fractionalized excitations. While much is known about their behaviour in closed quantum system, their fate in the presence of coupling to environment remains less studied. The goal of this thesis is to investigate spin liquids in open as well as non-hermitian quantum systems. By starting from Kitaev's honeycomb lattice model, various couplings to environment will be considered and steady state of the system will be investigated. Among the physical quantities of interest, the topological entanglement entropy and spin correlation functions will be evaluated. Other models of spin liquids will also be studied in the presence of non-hermitian terms.

Requirements: 

Excellent results in theoretical physics, at least modest interest in numerical methods.

State: 
Végleges
Témavezető
Name: 
DÓRA Balázs
Email: 
dora.balazs@ttk.bme.hu
Institute: 
Department of Theoretical Physics, Institute of Physics
Assignment: 
professor
Scientific degree: 
DSc
Stipendicum Hungaricum: 
No