30 citations · 150 across the 12 of their papers we have counts for
13 papers
Energy partitioning of wave packets in one-dimensional systems
Flavia B. Ramos, Imke Schneider, Sebastian Eggert +1
We investigate the non-equilibrium dynamics of wave packets in a one-dimensional critical fermionic system and analyze the resulting partitioning of energy between emergent excitat…
Nonlinear effects on charge fractionalization in critical chains
Flávia B. Ramos, Rodrigo G. Pereira, Sebastian Eggert +1
We investigate the generic transport in a one-dimensional strongly correlated fermionic chain beyond linear response. Starting from a Gaussian wave packet with positive momentum on…
Power-law decay of correlations after a global quench in the massive XXZ chain
Flávia B. Ramos, Andrew Urichuk, Imke Schneider +1
We investigate the relaxation dynamics of equal-time correlations in the antiferromagnetic phase of the XXZ spin-1/2 chain following a global quantum quench of the anisotropy param…
Continuous phase transition from a chiral spin state to collinear magnetic order in a zigzag chain with Kitaev interactions
Rafael A. Macedo, Flavia B. Ramos, Rodrigo G. Pereira
Quantum spin systems can break time reversal symmetry by developing spontaneous magnetization or spin chirality. However, collinear magnets and chiral spin states are invariant und…
Confinement and bound states of bound states in a transverse-field two-leg Ising ladder
Flavia B. Ramos, Mate Lencses, J. C. Xavier +1
Weakly coupled Ising chains provide a condensed-matter realization of confinement. In these systems, kinks and antikinks bind into mesons due to an attractive interaction potential…
Spin chain network construction of chiral spin liquids
Gabriel Ferraz, Flavia B. Ramos, Reinhold Egger +1
We show that a honeycomb lattice of Heisenberg spin- chains with three-spin junction interactions allows for controlled analytical studies of chiral spin liquids (CSLs). Tunin…
Chiral Y junction of quantum spin chains
F. Buccheri, R. Egger, R. G. Pereira +1
We study a Y junction of spin-1/2 Heisenberg chains with an interaction that breaks both time-reversal and chain exchange symmetries, but not their product nor SU(2) symmetry. The…
The Frustration of being Odd: Universal Area Law violation in local systems
Salvatore Marco Giampaolo, Flávia Braga Ramos, Fabio Franchini
At the core of every frustrated system, one can identify the existence of frustrated rings that are usually interpreted in terms of single--particle physics. We check this point of…
Dynamical structure factors in the nematic phase of frustrated ferromagnetic spin chains
Flávia B. Ramos, Sebas Eliëns, Rodrigo G. Pereira
Frustrated spin systems can show phases with spontaneous breaking of spin-rotational symmetry without the formation of local magnetic order. We study the dynamic response of the sp…
Quantum spin circulator in Y junctions of Heisenberg chains
F. Buccheri, R. Egger, R. G. Pereira +1
We show that a quantum spin circulator, a nonreciprocal device that routes spin currents without any charge transport, can be achieved in Y junctions of identical spin- Heisen…
Boundary versus bulk behavior of time-dependent correlation functions in one-dimensional quantum systems
I. S. Eliëns, F. B. Ramos, J. C. Xavier +1
We study the influence of reflective boundaries on time-dependent responses of one-dimensional quantum fluids at zero temperature beyond the low-energy approximation. Our analysis…
Universal Finite-Size Corrections of the Entanglement Entropy of Quantum Ladders and the Entropic Area Law
J. C. Xavier, F. B. Ramos
We investigate the finite-size corrections of the entanglement entropy of critical ladders and propose a conjecture for its scaling behavior. The conjecture is verified for free fe…
The N-Leg spin-S Heisenberg ladders: A DMRG study
F. B. Ramos, J. C. Xavier
We investigate the N-leg spin-S Heisenberg Ladders by using the density matrix renormalization group method. We present estimates of the spin gap and of the ground state en…