14 papers
Commensurate-incommensurate Mott transition without magnetic field: emergence of nematic Luttinger liquid in XXZ chain
Julien Fitouchi, Natalia Chepiga
We investigate the zero-magnetization phase diagram of a spin-1/2 chain with competing ferromagnetic nearest-neighbor and antiferromagnetic next-nearest-neighbor exchange couplings…
Non-magnetic floating phases in frustrated Haldane chains with a single-ion anisotropy
Bowy M. La Riviere, Natalia Chepiga
We investigate the effect of a single-ion anisotropy on the bilinear-biquadratic spin-1 J1-J2 chain, focusing on the quantum phase transitions out of the trimerized phase. Using la…
Exact zero modes in interacting Majorana X- and Y-junctions
Bowy M. La Rivière, Rik Mulder, Natalia Chepiga
We report the emergence of exact zero modes in junctions of two, three and four short interacting Majorana wires, equivalent to a chain with an impurity bond, Y- and X- junctions r…
Infinite randomness criticality and localization of the floating phase in arrays of Rydberg atoms trapped with non-perfect tweezers
Jose Soto-Garcia, Natalia Chepiga
Chains of Rydberg atoms have emerged as a powerful platform for exploring low-dimensional quantum physics. This success originates from the precise control of lattice geometries pr…
The quantum Kibble-Zurek mechanism: the role of boundary conditions, endpoints and kink types
Jose Soto Garcia, Natalia Chepiga
Quantum phase transitions are characterised by the universal scaling laws in the critical region surrounding the transitions. This universality is also manifested in the critical r…
Extended Ashkin-Teller transition in two coupled frustrated Haldane chains
Bowy M. La Rivière, Natalia Chepiga
We report an extremely rich ground state phase diagram of two spin-1 Haldane chains frustrated with a three-site exchange and coupled by the antiferromagnetic Heisenberg interactio…