Finite-temperature instabilities of a two-dimensional dipolar Bose gas at arbitrary tilt angle

Advances in creating stable dipolar Bose systems, and ingenious box traps have generated tremendous interest. Theory study of bosons at finite temperature (T) has been limited. Motivated by these, we 2D arbitrary tilt angle, $\theta$, using finite-T random phase approximation. We show that a comprehensive understanding phases instabilities non-zero T can be obtained on concurrently considering dipole strength, density, $\theta$. find the system to homogeneous non-condensed undergoes collapse transition large momentum instability, signaling striped phase, strength; there are important differences with T=0 case. At = 0, BEC appears critical density. Our predictions for polar molecule system, $^{41}K^{87}Rb$, $^{166}Er$ may provide tests our results. approach apply broadly systems long-range, anisotropic interactions.