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On the Quantum Density of States and Partitioning an Integer | | Muoi N. Tran
; M. V. N. Murthy
; Rajat K. Bhaduri
; | | Date: |
8 Sep 2003 | | Journal: | Annals Phys. 311 (2004) 204-219 | | Subject: | Mathematical Physics; Number Theory | math-ph math.MP math.NT nucl-th | | Abstract: | This paper exploits the connection between the quantum many-particle density of states and the partitioning of an integer in number theory. For $N$ bosons in a one dimensional harmonic oscillator potential, it is well known that the asymptotic (N -> infinity) density of states is identical to the Hardy-Ramanujan formula for the partitions p(n), of a number n into a sum of integers. We show that the same statistical mechanics technique for the density of states of bosons in a power-law spectrum yields the partitioning formula for p^s(n), the latter being the number of partitions of n into a sum of s-th powers of a set of integers. By making an appropriate modification of the statistical technique, we are also able to obtain d^s(n) for distinct partitions. We find that the distinct square partitions d^2(n) show pronounced oscillations as a function of n about the smooth curve derived by us. The origin of these oscillations from the quantum point of view is discussed. After deriving the Erdos-Lehner formula for restricted partitions for the $s=1$ case by our method, we generalize it to obtain a new formula for distinct restricted partitions. | | Source: | arXiv, math-ph/0309020 | | Services: | Forum | Review | PDF | Favorites | |
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