Variational study of the two‐impurity spin–boson model with a common Ohmic bath : ground‐state phase transitions

• Main Authors: Zhou, Nengji, Zhang, Yuyu, Lü, Zhiguo, Zhao, Yang
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Materials; Quantum Phase Transitions; Spin–boson Model
• Online Access: https://hdl.handle.net/10356/137030
• Institution: Nanyang Technological University

By means of a trial wave function, the multi‐D1 ansatz, extensive variational calculations with more than 10 000 parameters are carried out to study quantum phase transitions in the ground states of a two‐impurity system embedded in a common Ohmic bath of bosons. Quantum criticality in both the impu...