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arXiv math-ph/0110015math-phhep-phmath.MPnucl-th
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振子对势束缚的相对论N玻色子系统

Relativistic N-Boson Systems Bound by Oscillator Pair Potentials

Richard L. Hall, Wolfgang Lucha, F. F. Schoeberl

摘要:

本文研究了三维空间中由谐振子对势束缚的N个全同玻色子的相对论性系统的最低能量E。在自然单位中,系统具有半相对论性“无自旋Salpeter”哈密顿量H = \sum_{i=1}^N \sqrt{m^2 + p_i^2} + \sum_{j>i=1}^N gamma| r_i - r_j| ^2,γ> 0。我们推导出以下能量界限:E(N)= min_{r>0} [N(m^2 + 2(N-1)P^2 /(Nr^2))^1/2 + N(N-1)gamma r^2 / 2],N \ge 2,其中P=1.376产生所有N \ge 2的下限,P=3/2产生所有N的上限。函数P = P(mu)给出了一个更精确的下限,其中mu = m(N/(gamma(N-1)^2))^(1/3),这使得E(2)的公式是精确的:通过选择P,所有N \ge 2在薛定谔极限m -->无穷大时的界限都是一致的。

英文摘要:

We study the lowest energy E of a relativistic system of N identical bosons bound by harmonic-oscillator pair potentials in three spatial dimensions. In natural units the system has the semirelativistic ``spinless-Salpeter'' Hamiltonian H = \sum_{i=1}^N \sqrt{m^2 + p_i^2} + \sum_{j>i=1}^N gamma |r_i - r_j|^2, gamma > 0. We derive the following energy bounds: E(N) = min_{r>0} [N (m^2 + 2 (N-1) P^2 / (N r^2))^1/2 + N (N-1) gamma r^2 / 2], N \ge 2, where P=1.376 yields a lower bound and P=3/2 yields an upper bound for all N \ge 2. A sharper lower bound is given by the function P = P(mu), where mu = m(N/(gamma(N-1)^2))^(1/3), which makes the formula for E(2) exact: with this choice of P, the bounds coincide for all N \ge 2 in the Schroedinger limit m --> infinity.

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