Quantum Energy Teleportation and Entropy Change due to Feedback Control in One-Dimensional Heisenberg Model

Autor:	Itoh, Kanji, Masaki, Yusuke, Matsueda, Hiroaki
Rok vydání:	2023
Předmět:	Quantum Physics Condensed Matter - Statistical Mechanics
Druh dokumentu:	Working Paper
Popis:	We study the quantum energy teleportation in a four-spin one-dimensional Heisenberg model. A local magnetic field is applied at the edge sites to control the degree of the ground-state entanglement. In the teleportation protocol, an energy sender performs a projective measurement at one edge site, while an energy receiver performs a feedback control at the other edge site dependent on the measurement result to extract energy. We find that the energy extracted by the receiver takes a maximum at intermediate value of the local magnetic field. We also find that this magnetic-field behavior is almost proportional to entropy changes due to the feedback control. The role of a feedback control in an entropy change is discussed in terms of entanglement thermodynamics. Comment: 9 pages, 10 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2305.03967 Zobrazit plný text záznamu View this record from Arxiv