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Most recently, the path integral molecular dynamics has been successfullyused to consider the thermodynamics of single-component identical bosons andfermions. In this work, the path integral molecular dynamics is developed tosimulate the thermodynamics, Green's function and momentum distribution oftwo-component bosons in three dimensions. As an example of our general method,we consider the thermodynamics of up to sixteen bosons in a three-dimensionalharmonic trap. For noninteracting spinor bosons, our simulation shows a bump inthe heat capacity. As the repulsive interaction strength increases, however, wefind the gradual disappearance of the bump in the heat capacity. We believethis simulation result can be tested by ultracold spinor bosons with opticallattices and magnetic-field Feshbach resonance to tune the inter-particleinteraction. We also calculate Green's function and momentum distribution ofspinor bosons. Our work facilitates the exact numerical simulation of spinorbosons, whose property is one of the major problems in ultracold Bose gases.

Path integral molecular dynamics for thermodynamics and Green's function of ultracold spinor bosons