Tunneling between double wells of atom in crossed electromagnetic fields

doi:10.1088/1674-1056/18/12/027

中国物理B ›› 2009, Vol. 18 ›› Issue (12): 5277-5282.doi: 10.1088/1674-1056/18/12/027

Tunneling between double wells of atom in crossed electromagnetic fields

柳晓军¹, 刘红平¹, 沈礼², 汪磊², 杨海峰²

(1)State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China; (2)State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;Graduate School of the Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2008-12-18 修回日期:2009-03-11 出版日期:2009-12-20 发布日期:2009-12-20
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No 10774162) and National 973 Project (Grant No 2005CB724501).

Tunneling between double wells of atom in crossed electromagnetic fields

Shen Li(沈礼)^a)b),Wang Lei(汪磊)^a)b),Yang Hai-Feng(杨海峰)^a)b), Liu Xiao-Jun(柳晓军)^a),andLiu Hong-Ping(刘红平)^a)†

^a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China; ^b Graduate School of the Chinese Academy of Sciences, Beijing 100190, China

Received:2008-12-18 Revised:2009-03-11 Online:2009-12-20 Published:2009-12-20
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No 10774162) and National 973 Project (Grant No 2005CB724501).

摘要/Abstract

摘要： The tunneling between double wells of atom in crossed electromagnetic fields is investigated by a one-dimensional Hamiltonian model. The crossed fields induced outer well is apart from the nuclear origin and it is very difficult to access by means of spectroscopy but it will be possible if there exists the tunneling of the electron between the outer well and the Coulomb potential predominated well at the nuclear origin. A one-dimensional quantum calculation with B-spline basis has been performed for hydrogen atom in crossed fields accessible in our laboratory, at B=0.8~T and F=-220~V.cm^-1. The calculation shows that the wavefunctions of some excited states close to the Stark saddle point in the outer well extend over to the Coulomb potential well, making it possible to penetrate the quantum information of the outer well. However, the tunneling rate is very small and the spectral measurement of the transitions from the ground state should be of a high resolution and high sensitivity.

Abstract: The tunneling between double wells of atom in crossed electromagnetic fields is investigated by a one-dimensional Hamiltonian model. The crossed fields induced outer well is apart from the nuclear origin and it is very difficult to access by means of spectroscopy but it will be possible if there exists the tunneling of the electron between the outer well and the Coulomb potential predominated well at the nuclear origin. A one-dimensional quantum calculation with B-spline basis has been performed for hydrogen atom in crossed fields accessible in our laboratory, at B = 0.8 T and F = -220 V$\cdot$cm^-1. The calculation shows that the wavefunctions of some excited states close to the Stark saddle point in the outer well extend over to the Coulomb potential well, making it possible to penetrate the quantum information of the outer well. However, the tunneling rate is very small and the spectral measurement of the transitions from the ground state should be of a high resolution and high sensitivity.

Key words: double well, tunneling, crossed fields

中图分类号: (Potential energy surfaces)

31.50.-x

31.15.-p (Calculations and mathematical techniques in atomic and molecular physics) 32.60.+i (Zeeman and Stark effects) 32.70.Cs (Oscillator strengths, lifetimes, transition moments)

沈礼, 汪磊, 杨海峰, 柳晓军, 刘红平. Tunneling between double wells of atom in crossed electromagnetic fields[J]. 中国物理B, 2009, 18(12): 5277-5282.

Shen Li(沈礼),Wang Lei(汪磊),Yang Hai-Feng(杨海峰), Liu Xiao-Jun(柳晓军),andLiu Hong-Ping(刘红平) . Tunneling between double wells of atom in crossed electromagnetic fields[J]. Chin. Phys. B, 2009, 18(12): 5277-5282.

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Tunneling between double wells of atom in crossed electromagnetic fields

Tunneling between double wells of atom in crossed electromagnetic fields

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