Quantum impurity models of noisy qubits

2003/05/31 by D. V. Khveshchenko
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.str-el #quant-ph

paper · pdf · doi:10.1103/physrevb.69.153311

published as Phys. Rev. B 69, 153311 (2004) · Latex, 5 pages, no figures

openalex publication_date 2004/04/30 · arxiv created 2004/05/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We demonstrate that the problem of coupled two-level systems (``qubits'') which are also subject to a generic (sub-)Ohmic dissipative environment belongs to the same class of models as those describing (non)magnetic impurities embedded in strongly correlated systems. A further insight into the generalized single- and two-impurity Bose/Fermi Kondo models enables one to make specific recommendations towards a systematic engineering of highly coherent multiqubit assemblies for potential applications in quantum information processing.

Citations

• On the spin-boson model with a sub-ohmic bath
• Equilibrium Dynamics of the Dissipative Two-State System
• Quantum Phase Transition in a Multilevel Dot
• Quantum phase transitions in the Bose-Fermi Kondo model
• Numerical Renormalization Group for Bosonic Systems and Application to the Sub-Ohmic Spin-Boson Model
• Spin Orthogonality Catastrophe in Two-Dimensional Antiferromagnets and Superconductors
• Dynamics of the dissipative two-state system