Physics – Quantum Physics
Scientific paper
2010-08-26
Physics
Quantum Physics
5 pages, 4 figures
Scientific paper
An anharmonic oscillator when driven with a fast, frequency chirped voltage pulse can oscillate with either small or large amplitude depending on whether the drive voltage is below or above a critical value-a well studied classical phenomenon known as autoresonance. Using a 6 GHz superconducting resonator embedded with a Josephson tunnel junction, we have studied for the first time the role of noise in this non-equilibrium system and find that the width of the threshold for capture into autoresonance decreases as the square root of T, and saturates below 150 mK due to zero point motion of the oscillator. This unique scaling results from the non-equilibrium excitation where fluctuations, both quantum and classical, only determine the initial oscillator motion and not its subsequent dynamics. We have investigated this paradigm in an electrical circuit but our findings are applicable to all out of equilibrium nonlinear oscillators.
Aumentado José
Barth Ido
Friedland Lazar
Murch Kater W.
Naaman O.
No associations
LandOfFree
Quantum Fluctuations in the Chirped Pendulum does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum Fluctuations in the Chirped Pendulum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Fluctuations in the Chirped Pendulum will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-703418