Physics – Quantum Physics
Scientific paper
2008-03-19
New J. Phys. 10 095009 (2008)
Physics
Quantum Physics
submitted to NJP
Scientific paper
10.1088/1367-2630/10/9/095009
Laser cooling of a mechanical mode of a resonator by the radiation pressure of a detuned optical cavity mode has been recently demonstrated by various groups in different experimental configurations. Here we consider the effect of a second mechanical mode with a close, but different resonance frequency. We show that the nearby mechanical resonance is simultaneously cooled by the cavity field, provided that the difference between the two mechanical frequencies is not too small. When this frequency difference becomes smaller than the effective mechanical damping of the secondary mode, the two cooling processes interfere destructively and cavity cooling is suppressed in the limit of identical mechanical frequencies. We show that also the entanglement properties of the steady state of the tripartite system crucially depend upon on the difference between the two mechanical frequencies. If the latter is larger than the effective damping of the second mechanical mode, the state shows fully tripartite entanglement and each mechanical mode is entangled with the cavity mode. If instead the frequency difference is smaller, the steady state is a two-mode biseparable state, inseparable only when one splits the cavity mode from the two mechanical modes. In this latter case, the entanglement of each mechanical mode with the cavity mode is extremely fragile with respect to temperature.
Genes Claudiu
Tombesi Paolo
Vitali David
No associations
LandOfFree
Simultaneous cooling and entanglement of mechanical modes of a micromirror in an optical cavity 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 Simultaneous cooling and entanglement of mechanical modes of a micromirror in an optical cavity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous cooling and entanglement of mechanical modes of a micromirror in an optical cavity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-323035