Vacuum Rabi Oscillations in a Macroscopic Superconducting Qubit LC Oscillator System
Abstract
We have observed the coherent exchange of a single energy quantum between a flux qubit and a superconducting LC circuit acting as a quantum harmonic oscillator. The exchange of an energy quantum is known as the vacuum Rabi oscillation: the qubit is oscillating between the excited state and the ground state and the oscillator between the vacuum state and the first excited state. We also show that we can detect the state of the oscillator with the qubit and thereby obtained evidence of level quantization of the LC circuit. Our results support the idea of using oscillators as couplers of solidstate qubits.
 Publication:

Physical Review Letters
 Pub Date:
 March 2006
 DOI:
 10.1103/PhysRevLett.96.127006
 arXiv:
 arXiv:condmat/0510457
 Bibcode:
 2006PhRvL..96l7006J
 Keywords:

 85.25.Cp;
 03.67.Lx;
 32.80.t;
 Josephson devices;
 Quantum computation;
 Photon interactions with atoms;
 Condensed Matter  Superconductivity;
 Condensed Matter  Mesoscale and Nanoscale Physics
 EPrint:
 Submitted to Phys. Rev. Lett