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Conference on Lasers and Electro-Optics

Engineering the vibronic coupling of a trapped atom

R. L. de Matos Filho, W. Vogel

Published Nov 27, 2002• 0 citations
Publisher

Abstract

Summary form only given.The recent progress in trapping and cooling of atoms allowed us to prepare and to measure various nonclassical states of atomic motion. These methods make use of the laser-assisted vibronic interaction of the trapped atom. The interaction Hamiltonian for the laser being resonant to the kth vibrational sideband.
DOI
10.1109/iqec.1998.680003

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Highly excited eigenstates of the motion of an individual spatially confined atom may be prepared making use of a “trapping” mechanism based on the nonlinearity of the laser-mediated coupling of internal excitation and center-of-mass vibration of the atom. In contrast to micromaser-type trapping states, these states are insensitive to laser-phase fluctuations, and a long sequence of laser pulses may be applied to the atom with little degradation only of the atomic motion. Thus, vibrational number states of high quantum numbers are achievable.
Summary form only given. A brief history of the laser cooling and trapping of atoms will be presented, covering some of the cooling and trapping techniques that have been developed over the past 15 years. The cooling and trapping technology is already being applied in numerous areas of science and engineering. Applications to be discussed include atomic clocks, atom interferometers for inertial sensors and for the measurement of the fine structure constant, as well as studies in polymer dynamics and protein motion.
Recently, laser cooling methods have been extended from atoms to molecules. The complex rotational and vibrational energy level structure of molecules makes laser cooling difficult, but these difficulties have been overcome and molecules have now been cooled to a few microkelvin and trapped for several seconds. This opens many possibilities for applications in quantum science and technology, controlled chemistry, and tests of fundamental physics. This article explains how molecules can be decelerated, cooled and trapped using laser light, reviews the progress made in recent years, and outlines some future applications.