Association of molecules using a resonantly modulated magnetic field

Details Association of molecules using a resonantly modulated magnetic field Association of molecules using a resonantly modulated magnetic field

2006-09-28

arxiv.org/abs/cond-mat/0609725v2

Physical Review A 75, 013606 (2007)

Physics

Condensed Matter

Other Condensed Matter

8 pages latex, figures revised, references updated and typos corrected

Scientific paper

10.1103/PhysRevA.75.013606

We study the process of associating molecules from atomic gases using a magnetic field modulation that is resonant with the molecular binding energy. We show that maximal conversion is obtained by optimising the amplitude and frequency of the modulation for the particular temperature and density of the gas. For small modulation amplitudes, resonant coupling of an unbound atom pair to a molecule occurs at a modulation frequency corresponding to the sum of the molecular binding energy and the relative kinetic energy of the atom pair. An atom pair with an off-resonant energy has a probability of association which oscillates with a frequency and time-varying amplitude which are primarily dependent on its detuning. Increasing the amplitude of the modulation tends to result in less energetic atom pairs being resonantly coupled to the molecular state, and also alters the dynamics of the transfer from continuum states with off-resonant energies. This leads to maxima and minima in the total conversion from the gas as a function of the modulation amplitude. Increasing the temperature of the gas leads to an increase in the modulation frequency providing the best fit to the thermal distribution, and weakens the resonant frequency dependence of the conversion. Mean-field effects can alter the optimal modulation frequency and lead to the excitation of higher modes. Our simulations predict that resonant association can be effective for binding energies of order $h \times 1$ MHz.

Affiliated with

Also associated with

No associations

Rating

Association of molecules using a resonantly modulated magnetic field 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 Association of molecules using a resonantly modulated magnetic field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Association of molecules using a resonantly modulated magnetic field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-531405