Quantum Information with Solid-State Devices VO 141.A55 SS2016 - PowerPoint PPT Presentation

Quantum Information with Solid-State Devices VO 141.A55 SS2016 Dr. Johannes Majer Lecture 9

RF-SQUID

RF-SQUID

Fluxonium

Phase Qubit

Phase Qubit

persistent-current qubit f=0 α =0.8 − 8 1 − 6 0.5 − 4 0 − 2 − 0.5 φ 2 0 − 1 2 − 1.5 4 − 2 6 8 − 2.5 − 8 − 6 − 4 − 2 0 2 4 6 8 φ 1 f=0

persistent-current qubit f=0.5 α =0.8 2.5 − 8 − 6 2 − 4 1.5 − 2 1 φ 2 0 0.5 2 0 4 − 0.5 6 − 1 8 − 8 − 6 − 4 − 2 0 2 4 6 8 φ 1 f=0.5

persistent-current qubit α =0.8 3 f=0.5 f=0.55 2.5 f=0.45 2 1.5 1 Energy (E J ) 0.5 0 − 0.5 − 1 − 1.5 − 2 − 4 − 3 − 2 − 1 0 1 2 3 4 φ 1= − φ 2

persistent-current qubit

persistent-current qubit

persistent-current qubit

persistent-current qubit

persistent-current qubit

persistent-current qubit

persistent-current qubit

persistent-current qubit

persistent-current qubit

persistent-current qubit

persistent-current qubit