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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Ramsey interferometry ： ウィキペディア英語版 Ramsey interferometry Ramsey interferometry, also known as Ramsey-Bordé interferometry or the separated oscillating fields method, is a form of atom interferometry that uses the phenomenon of magnetic resonance to measure transition frequencies of atoms. It was developed in 1949 by Norman Ramsey, who built upon the ideas of his mentor, Isidor Isaac Rabi, who initially developed a technique for measuring atomic transition frequencies. Ramsey's method is used today in atomic clocks and in the S.I. definition of the second. Most precision atomic measurements, such as modern atom interferometers and quantum logic gates, have a Ramsey-type configuration.〔Deutsch, Ivan. ''Quantum Optics I, PHYS 566, at the University of New Mexico.'' Problem Set 3 and Solutions. Fall 2013.〕 A modern interferometer using a Ramsey configuration was developed by French physicist Christian Bordé and is known as the Ramsey-Bordé interferometer. Bordé's main idea was to use atomic recoil to create a beam splitter of different geometries for an atom-wave.The Ramsey-Bordé interferometer specifically uses two pairs of counter-propagating interaction waves, and another method named the "photon-echo" uses two co-propagating pairs of interaction waves.〔Bordé, Christian J. Email Correspondance on December 8, 2013.〕 == Introduction == A main goal of precision spectroscopy of a two-level atom is to measure the absorption frequency $\backslash omega\_0$ between the ground state and excited state of the atom. One way to accomplish this measurement is to apply an external oscillating electromagnetic field at frequency $\backslash omega$ and then find the difference $\backslash Delta$ (also known as the detuning) between $\backslash omega$ and $\backslash omega\_0$ $(\backslash Delta\; =\; \backslash omega\; -\; \backslash omega\_0)$ by measuring the probability to transfer to . This probability can be maximized when $\backslash Delta\; =\; 0$, when the driving field is on resonance with the transition frequency of the atom. Looking at this probability of transition as a function of the detuning $P(\backslash Delta)$, the narrower the peak around $\backslash Delta\; =\; 0$ the more precision there is. If the peak were very broad about $\backslash Delta\; =\; 0$ then it would be difficult to distinguish precisely where $\backslash Delta\; =\; 0$ is located due to many values of $\backslash Delta$ having close to the same probability.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ramsey interferometry」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.