93 citations · 725 across the 45 of their papers we have counts for
7 papers · 1 filter
Quantum Ising transition on the Cayley tree: boundary criticality, universality, and an effective Bethe line
Pietro Richelli, Natalia Chepiga
We investigate quantum criticality in the transverse-field Ising model on finite Cayley trees and demonstrate that their extensive boundary fundamentally changes the nature of the…
Criticality enabled long-range order in a U(1)-symmetric spin-1 Heisenberg chain with biquadratic interactions
Natalia Chepiga, Fabian H. L. Essler
In a recent paper Nahum argued on the basis of a renormalization-group analysis that, contrary to standard lore, ground states of 1D spin chains with short-range interactions can s…
Engineering Weak Universality with Quantum Dots
Warre Missiaen, Michael Wimmer, Natalia Chepiga
Quantum critical theories with continuously varying critical exponents remain challenging to access experimentally. Here, we propose quantum-dot architectures for realizing the qua…
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…
Long-lived revivals and real-space fragmentation in chains of multispecies Rydberg atoms
Jose Soto-Garcia, Natalia Chepiga
Arrays of Rydberg atoms provide a powerful platform for exploring constrained quantum dynamics and nonergodic many-body phenomena. While most work has focused on single-species sys…
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…
Boundary critical phenomena in the quantum Ashkin-Teller model
Yifan Liu, Natalia Chepiga, Yoshiki Fukusumi +1
We investigate the boundary critical phenomena of the one-dimensional quantum Ashkin-Teller model using boundary conformal field theory and density matrix renormalization group (DM…