TY - JOUR AU - Braiorr-Orrs, B. AU - Weyrauch, M. AU - Rakov, M. V. PY - 2019/01/05 Y2 - 2024/03/29 TI - Numerical Studies of Entanglement Properties in One- and Two-Dimensional Quantum Ising and XXZ Models JF - Ukrainian Journal of Physics JA - Ukr. J. Phys. VL - 61 IS - 7 SE - Solid matter DO - 10.15407/ujpe61.07.0613 UR - https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019064 SP - 613 AB - <p>We investigate entanglement properties of infinite one- and two-dimensional spin-1/2 quantum Ising and XXZ models. Tensor network methods (TI MPS with single-site update and TEBD for MPS, TERG and CTMRG with “simple update” for PEPS) are used to model the ground states of the studied models. Different entanglement measures, such as the one-site entanglement entropy, one-tangle, concurrence of formation and assistance, negativity and entanglement per bond are compared with respect to their ability to exhibit “structures” in the phase diagram of the models (e.g., phase transitions). We study the connection between symmetries and the entanglement of ground states and analyze short- and long-range entanglement through the entanglement monogamy.</p> ER -