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arXiv 0901.0614hep-th
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模糊时空的热力学

Thermodynamics on Fuzzy Spacetime

Wung-Hong Huang

摘要:

利用非对易模糊几何研究了时空中非相对论性和相对论性理想气体的热力学。我们首先发现非相对论性理想玻色子和费米子在模糊双球上的热容与在交换几何上的热容不同。我们计算的“统计粒子间的潜力”,并将此属性作为结果,非交换性的模糊球有一个倾向,以提高统计“吸引(排斥)粒子间的潜力”玻色子(费米子)。我们还看到,在高温下,热容接近于零。接下来,我们计算了1+D(D= 2,3)闵可夫斯基时空与模糊双球乘积上的非相对论理想玻色子和费米子的热容,发现费米子的热容在高温极限下是温度的递减函数,而在交换几何上总是温度的递增函数。在高温极限下,玻色子和费米子的热容都接近1+D闵可夫斯基时空。我们讨论了这些结果,并提到的属性可以追溯到“热还原的模糊空间”的机制。我们还研究了具有自由Klein-Gordon场和Dirac场的相对论系统中同样的问题,发现了类似的性质。

英文摘要:

We investigate the thermodynamics of non-relativistic and relativistic ideal gases on the spacetime with noncommutative fuzzy geometry. We first find that the heat capacities of the non-relativistic ideal boson and fermion on the fuzzy two-sphere have different values, contrast to that on the commutative geometry. We calculate the "statistical interparticle potential" therein and interprete this property as a result that the non-commutativity of the fuzzy sphere has an inclination to enhance the statistical "attraction (repulsion) interparticle potential" between boson (fermion). We also see that at high temperature the heat capacity approaches to zero. We next evaluate the heat capacities of the non-relativistic ideal boson and fermion on the product of the 1+D (with D=2,3) Minkowski spacetime by a fuzzy two-sphere and see that the fermion capacity could be a decreasing function of temperature in high-temperature limit, contrast to that always being an increasing function on the commutative geometry. Also, the boson and fermion heat capacities both approach to that on the 1+D Minkowski spacetime in high-temperature limit. We discuss these results and mention that the properties may be traced to the mechanism of "thermal reduction of the fuzzy space". We also investigate the same problems in the relativistic system with free Klein-Gordon field and Dirac field and find the similar properties.

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