Observation of two-photon dynamic Stark effect in a three-level Rydberg Na atom

We study the entanglement properties of two three-level Rydberg atoms passing through a single-mode cavity. The interaction of an atom with the cavity field allows the atom to make a transition from the upper most (lower most) to the lower most (upper most) level by emission (absoprtion) of two photons via the middle level. We employ an effective Hamiltonian that describes the system with a Stark shifted two-photon atomic transition. We compute the entanglement of formation of the joint two-atom state as a function of Rabi angle $gt$ . It is shown that the Stark shift can be used to enhance the magnitude of atomic entanglement over that obtained in the resonant condition for certain parameter values. We find that though the two-atom entanglement generally diminishes with the increase of the two-photon detuning and the Stark shift, it is possible to sustain the entanglement over a range of interaction times by making the detuning and the Stark shift compensate each other. Similar characteristics are obtained for a thermal state cavity field too.We study the entanglement properties of two three-level Rydberg atoms passing through a single-mode cavity. The interaction of an atom with the cavity field allows the atom to make a transition from the upper most (lower most) to the lower most (upper most) level by emission (absoprtion) of two photons via the middle level. We employ an effective Hamiltonian that describes the system with a Stark shifted two-photon atomic transition. We compute the entanglement of formation of the joint two-atom state as a function of Rabi angle $gt$. It is shown that the Stark shift can be used to enhance the magnitude of atomic entanglement over that obtained in the resonant condition for certain parameter values. We find that though the two-atom entanglement generally diminishes with the increase of the two-photon detuning and the Stark shift, it is possible to sustain the entanglement over a range of interaction times by making the detuning and the Stark shift compensate each other. Similar characteristics are obtained for a thermal state cavity field too.

arXiv:0708.0770Aug 6, 20070 citations

Rydberg sodium atoms in a strong microwave field

Igor M. Beterov, I. I. Ryabtsev

Review of experiments on microwave spectroscopy of sodium Rydberg atoms carried out during last several years by our group, is presented. Most of the experiments have been done for the first time with Rydberg atoms. These are: static and dynamics Stark spectroscopy, two-photon dynamic Stark effect, double Stark resonance, scattering of Rydberg atomic beam by strong resonant microwave radiation. Also an experiment on pure amplification without the inversion in two-level Rydberg micromaser is discussed.Review of experiments on microwave spectroscopy of sodium Rydberg atoms carried out during last several years by our group, is presented. Most of the experiments have been done for the first time with Rydberg atoms. These are: static and dynamics Stark spectroscopy, two-photon dynamic Stark effect, double Stark resonance, scattering of Rydberg atomic beam by strong resonant microwave radiation. Also an experiment on pure amplification without the inversion in two-level Rydberg micromaser is discussed.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEOct 21, 19980 citations

Three-photon coherence of Rydberg atomic states

Hyo Min Kwak, Taek Jeong, Yoon‐Seok Lee +1 more

Bulletin of the American Physical SocietyMay 25, 20160 citations

Three-photon electromagnetically induced transparency in Rydberg atoms

Yağız Oyun

Jul 1, 20190 citations

Control of atomic entanglement by the dynamic Stark effect

Biplab Ghosh, A. S. Majumdar, N. Nayak

We study the entanglement properties of two three-level Rydberg atoms passing through a single-mode cavity. The interaction of an atom with the cavity field allows the atom to make a transition from the uppermost (lowermost) to the lowermost (uppermost) level by emission (absorption) of two photons via the middle level. We employ an effective Hamiltonian that describes the system with a Stark-shifted two-photon atomic transition. We compute the entanglement of formation of the joint two-atom state as a function of Rabi angle gt . It is shown that the Stark shift can be used to enhance the magnitude of atomic entanglement over that obtained in the resonant condition for certain parameter values. We find that though the two-atom entanglement generally diminishes with the increase of the two-photon detuning and the Stark shift, it is possible to sustain the entanglement over a range of interaction times by making the detuning and the Stark shift compensate each other. Similar characteristics are also obtained for a thermal state cavity field.We study the entanglement properties of two three-level Rydberg atoms passing through a single-mode cavity. The interaction of an atom with the cavity field allows the atom to make a transition from the uppermost (lowermost) to the lowermost (uppermost) level by emission (absorption) of two photons via the middle level. We employ an effective Hamiltonian that describes the system with a Stark-shifted two-photon atomic transition. We compute the entanglement of formation of the joint two-atom state as a function of Rabi angle gt . It is shown that the Stark shift can be used to enhance the magnitude of atomic entanglement over that obtained in the resonant condition for certain parameter values. We find that though the two-atom entanglement generally diminishes with the increase of the two-photon detuning and the Stark shift, it is possible to sustain the entanglement over a range of interaction times by making the detuning and the Stark shift compensate each other. Similar characteristics are also obtained for a thermal state cavity field.

Journal of Physics B Atomic Molecular and Optical PhysicsMar 10, 200824 citations

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. It is shown that the Stark shift can be used to enhance the magnitude of atomic entanglement over that obtained in the resonant condition for certain parameter values. We find that though the two-atom entanglement generally diminishes with the increase of the two-photon detuning and the Stark shift, it is possible to sustain the entanglement over a range of interaction times by making the detuning and the Stark shift compensate each other. Similar characteristics are obtained for a thermal state cavity field too.