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cond-mat.str-el2020★ 2 cited
Quantum correlations in the spin-1/2 Heisenberg XXZ chain with modulated Dzyaloshinskii-Moriya interaction
F. Khastehdel Fumani, B. Beradze, S. Nemati +2
We study a one-dimensional spin-1/2 XXZ Heisenberg model with alternating Dzyaloshinskii- Moriya interaction, using the numerical Lanczos method. Recently, the ground state (GS) ph…
quant-ph2020
Fidelity approach: the misleading role of finite size level crossing of excited energies
Somayyeh Nemati, Fatemeh Khastehdel Fumani, Saeed Mahdavifar
Here, we show that, although quantum fidelity can truly identify two quantum phase transitions of a one-dimensional spin-1/2 quantum Ising model with competing nearest and next-nea…