On the Mean-Field Limit of Bosons with Coulomb Two-Body Interaction
- First Online:
- Cite this article as:
- Fröhlich, J., Knowles, A. & Schwarz, S. Commun. Math. Phys. (2009) 288: 1023. doi:10.1007/s00220-009-0754-z
- 143 Downloads
In the mean-field limit the dynamics of a quantum Bose gas is described by a Hartree equation. We present a simple method for proving the convergence of the microscopic quantum dynamics to the Hartree dynamics when the number of particles becomes large and the strength of the two-body potential tends to 0 like the inverse of the particle number. Our method is applicable for a class of singular interaction potentials including the Coulomb potential. We prove and state our main result for the Heisenberg- picture dynamics of “observables”, thus avoiding the use of coherent states. Our formulation shows that the mean-field limit is a “semi-classical” limit.