Over the past decade, tremendous progress has been made to extend tools of laser cooling and trapping molecules. Those same have recently applied polyatomic molecules (molecules containing three or more atoms). In this review, we discuss scientific drive bring larger ultralow temperatures, features molecular structure that provide most promising for pursuit, some technical aspects how lasers ca...

The phonon Casimir effect describes the phonon-mediated interaction between defects in condensed-matter systems. Using path-integral formalism, we derive a general method for calculating Helmholtz free energy due to vibrational modes systems of arbitrary dimensionality and composition. Our results make it possible extract defect at any temperature various configurations. We demonstrate our appr...