5 papers
Vacancy-like dressed states in topological waveguide QED
Luca Leonforte, Angelo Carollo, Francesco Ciccarello
We identify a class of dressed atom-photon states formingat the same energy of the atom at any coupling strength. As a hallmark, their photonic component is an eigenstate of the ba…
Haldane Model at finite temperature
Luca Leonforte, Davide Valenti, Bernardo Spagnolo +2
We consider the Haldane model, a 2D topological insulator whose phase is defined by the Chern number. We study its phases as temperature varies by means of the Uhlmann number, a fi…
On critical properties of Berry curvature in Kitaev honeycomb model
Francesco Bascone, Luca Leonforte, Davide Valenti +2
We analyse the Kitaev honeycomb model, by means of the Berry curvature with respect to Hamiltonian parameters. We concentrate on the ground-state vortex-free sector, which allows u…
Finite temperature geometric properties of the Kitaev honeycomb model
Francesco Bascone, Luca Leonforte, Bernardo Spagnolo +2
We study finite temperature topological phase transitions of the Kitaev's spin honeycomb model in the vortex-free sector with the use of the recently introduced mean Uhlmann curvat…
Uhlmann number in translational invariant systems
Luca Leonforte, Davide Valenti, Bernardo Spagnolo +1
We define the Uhlmann number as an extension of the Chern number, and we use this quantity to describe the topology of 2D translational invariant Fermionic systems at finite temper…