Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Chepiga, Natalia"'
Autor:
La Rivière, Bowy M., Chepiga, Natalia
We study the nature of quantum phase transitions out of $\mathbb{Z}_4$ ordered phases in quantum loop models on a zig-zag ladder. We report very rich critical behavior that includes a pair of Ising transitions, a multi-critical Ashkin-Teller point an
Externí odkaz:
http://arxiv.org/abs/2406.20093
Autor:
Chepiga, Natalia
Publikováno v:
Phys. Rev. B 110, 144401 (2024)
We explore the universal signatures of quantum phase transitions that can be extracted with the density matrix renormalization group (DMRG) algorithm applied to quantum chains with a gradient. We present high-quality data collapses for the order para
Externí odkaz:
http://arxiv.org/abs/2406.16594
Autor:
Garcia, Jose Soto, Chepiga, Natalia
Publikováno v:
Phys. Rev. B 110, 125113 (2024)
The experimental realization of the quantum Kibble-Zurek mechanism in arrays of trapped Rydberg atoms has brought the problem of commensurate-incommensurate transition back into the focus of active research. Relying on equilibrium simulations of fini
Externí odkaz:
http://arxiv.org/abs/2403.03081
Autor:
Chepiga, Natalia
Publikováno v:
Phys. Rev. B 109, 214403 (2024)
We study dimerization transitions in a frustrated spin-3 chain with next-nearest neighbor and three-site interactions. We show that two independent coupling constants of the model are sufficient to fine-tune the system to the critical point in the We
Externí odkaz:
http://arxiv.org/abs/2402.05031
Autor:
Chepiga, Natalia
Publikováno v:
Phys. Rev. Lett. 132, 076505 (2024)
Arrays of Rydberg atoms have appeared as a remarkably rich playground to study quantum phase transitions in one dimension. One of the biggest puzzles that was brought forward in this context are chiral phase transitions out of density waves. Theoreti
Externí odkaz:
http://arxiv.org/abs/2308.12838
Publikováno v:
Phys. Rev. B 108, 184425 (2023)
We investigate the nature of the phase transitions in the quantum Ashkin-Teller chain in the presence of chiral perturbations. We locate the Lifshitz line separating a region of direct chiral transitions from the region where the transition is throug
Externí odkaz:
http://arxiv.org/abs/2308.07144
Autor:
Chepiga, Natalia, Laflorencie, Nicolas
Publikováno v:
Phys. Rev. Lett. 132, 056502 (2024)
The quantum critical properties of interacting fermions in the presence of disorder are still not fully understood. While it is well known that for Dirac fermions, interactions are irrelevant to the non-interacting infinite randomness fixed point (IR
Externí odkaz:
http://arxiv.org/abs/2305.10363
The properties of stable Luttinger liquid phases in models with a non-conserved number of particles are investigated. We study the Luttinger liquid phases in one-dimensional models of hard-core boson and spinless fermion chains where particles can be
Externí odkaz:
http://arxiv.org/abs/2305.01746
Autor:
Chepiga, Natalia
Publikováno v:
Phys. Rev. B 108, 054509 (2023)
We study critical properties of a Majorana chain in the presence of two competing interactions of the shortest possible range. The obtained phase diagram is very rich and contains nine different phases, including three floating, two Ising, and four g
Externí odkaz:
http://arxiv.org/abs/2304.10390
Autor:
Chepiga, Natalia, Laflorencie, Nicolas
Publikováno v:
SciPost Phys. 14, 152 (2023)
We study Majorana chain with the shortest possible interaction term and in the presence of hoping alternation. When formulated in terms of spins the model corresponds to the transverse field Ising model with nearest-neighbor transverse and next-neare
Externí odkaz:
http://arxiv.org/abs/2211.15598