Download PDF by E. Arimondo, P.R. Berman and C.C. Lin (Eds.): Advances in Atomic, Molecular, and Optical Physics

By E. Arimondo, P.R. Berman and C.C. Lin (Eds.)

ISBN-10: 0123810213

ISBN-13: 9780123810212

This quantity keeps the culture of the Advances sequence. It comprises contributions from specialists within the box of atomic, molecular, and optical (AMO) physics. The articles comprise a few assessment fabric, yet are meant to supply a entire photo of modern vital advancements in AMO physics. either theoretical and experimental articles are integrated within the quantity. . overseas specialists . entire articles . New advancements

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The measurement of transitions between these atomic states can be accomplished in several ways. Perhaps the simplest measurement method is the passive excitation method, where an oscillating magnetic field is applied to the atoms at a frequency corresponding to the energy difference. When the frequency of the applied field is close to the fre­ quency of the atomic transition, an oscillating moment (coherence) is excited in the atom. Most frequently, magnetic dipole moments are excited. This coherence allows energy to be transferred from the field (atom) to the atom (field), and changes the internal state of the atom.

Because of the slightly different g-factors for states in each of the two hyperfine levels, there is a small first-order magnetic field sensitivity for each of the mF = þ1 ! mF = –1 and mF = –1 ! mF = þ1 transitions. In 87Rb for example, individual mF = +1 states are shifted by over 300 kHz in 50 mT magnetic field. However, the difference frequency between the states jF ¼ 2; mF ¼ þ1Þ and jF ¼ 2; mF ¼ À1Þ shifts by only a few hundred hertz because of their much smaller linear magnetic field dependence.

The signal-to-noise ratio was about 10 times worse than that pre­ dicted by photon shot noise and was limited by frequency noise on the diode laser being translated into intensity noise on the measured atomic fluorescence. , 2000). 3 kHz ω2 Figure 6 (a) and (b) Rabi fringes from a Na atomic beam excited by a modulated dye laser. 6 kHz. Reprinted figure with permission from Thomas et al. 1 1 10 102 103 104 τ (seconds) Figure 7 Allan deviation of a frequency reference based on Raman–Ramsey excitation of CPT resonances in a Na atomic beam.

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Advances in Atomic, Molecular, and Optical Physics by E. Arimondo, P.R. Berman and C.C. Lin (Eds.)

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