Quantum Fluctuations in a Four-Body Coulomb System and Breakdown of the Adiabatic Approximation (Cross-disciplinary Physics and Related Areas of Science and Technology)
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概要
- 論文の詳細を見る
Accuracy of the Born-Oppenheimer adiabatic approximation to the ground state of a hydrogenlike molecule (M^+M^+m^-m^-) is examined in comparison with the exact results obtained by diffusion Monte Carlo simulations, fully incorporating quantum fluctuations. For the mass ratio m/M < 0.1, the relative error in the ground-state energy is found to be less than 1 %. We discuss the change in nature of the binding mechanism of this system with the increase of m/M from the usual chemical bonding at m/M ≪ 1 to the one in which nonadiabatic effects such as the retardation of electron response to proton motion play a crucial role.
- 社団法人日本物理学会の論文
- 2003-10-15
著者
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Takada Yasutami
Institute For Solid Physics University Of Tokyo
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Cui Tian
National Lab For Superhard Materials Jilin University
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