We study the cavity-induced cooling of the center-of-mass motion of a transversally coherently pumped atom moving along the axis of a high- $Q$ multimode cavity. Including spontaneous emission and quantum fluctuations of the cavity field, we analytically calculate the linear friction and the diffusion coefficients. Efficient cavity-induced motional damping leads to steady-state temperatures well below the Doppler limit and lower than for an equivalent setup with direct cavity field pumping. The cooling process is strongly enhanced in the case of a multimode field, yielding a significantly lower temperature and a small number of spontaneous emissions per cooling time, which can even drop below 1.We study the cavity-induced cooling of the center-of-mass motion of a transversally coherently pumped atom moving along the axis of a high-$Q$ multimode cavity. Including spontaneous emission and quantum fluctuations of the cavity field, we analytically calculate the linear friction and the diffusion coefficients. Efficient cavity-induced motional damping leads to steady-state temperatures well below the Doppler limit and lower than for an equivalent setup with direct cavity field pumping. The cooling process is strongly enhanced in the case of a multimode field, yielding a significantly lower temperature and a small number of spontaneous emissions per cooling time, which can even drop below 1.

Physical Review AOct 7, 200228 citations

Enhancement of coherent dipole coupling between two atoms via squeezing a cavity mode

Yan Wang, Chuang Li, Elijah M. Sampuli +3 more

We propose a theoretical method to enhance the coherent dipole coupling between two atoms in an optical cavity via parametrically squeezing the cavity mode. In the present scheme, conditions for coherent coupling are derived in detail and diverse dynamics of the system can be obtained by regulating system parameters. In the presence of environmental noise, an auxiliary squeezed field is employed to suppress and even completely eliminate the additional noise induced by squeezing. In addition, we demonstrate that our scheme enables the effective suppression of atomic spontaneous emission. The results in our investigation could be used for diverse applications in quantum technologies.We propose a theoretical method to enhance the coherent dipole coupling between two atoms in an optical cavity via parametrically squeezing the cavity mode. In the present scheme, conditions for coherent coupling are derived in detail and diverse dynamics of the system can be obtained by regulating system parameters. In the presence of environmental noise, an auxiliary squeezed field is employed to suppress and even completely eliminate the additional noise induced by squeezing. In addition, we demonstrate that our scheme enables the effective suppression of atomic spontaneous emission. The results in our investigation could be used for diverse applications in quantum technologies.

arXiv:1902.05751Physical Review AFeb 19, 201941 citations

We study the cavity-induced cooling of the center-of-mass motion of a transversally coherently pumped atom moving along the axis of a high-

Q

multimode cavity. Including spontaneous emission and quantum fluctuations of the cavity field, we analytically calculate the linear friction and the diffusion coefficients. Efficient cavity-induced motional damping leads to steady-state temperatures well below the Doppler limit and lower than for an equivalent setup with direct cavity field pumping. The cooling process is strongly enhanced in the case of a multimode field, yielding a significantly lower temperature and a small number of spontaneous emissions per cooling time, which can even drop below 1.