Mariusz Adamski

Fidelity Approach to Quantum Phase Transitions

I Will start my talk by briefly presenting the topic of phase transitions, highlighting some key similarities and differences between quantum and ordinary (temperature driven) phase transitions. Next, I will describe the concept of ground state fidelity and some of the tools comprising the so-called fidelity approach. Finally, I hope to touch the subject of critical exponents and universality classes and tie them to the above mentioned methods.