A key manifestation of superfluidity in liquids and gases is a reduction the moment inertia under slow rotations. Non-classical rotational effects have been searched for long time also elusive supersolid phase matter, which coexists with lattice structure. Here we show that recently discovered dipolar quantum features reduced inertia. We study peculiar oscillation mode harmonic potential, sciss...

The pure rotational spectrum of phenanthridine (C(13)H(9)N), a small polycyclic aromatic nitrogen heterocycle (PANH), has been measured from 48 to 85 GHz employing Stark modulated millimetre wave absorption spectroscopy of a supersonic rotationally cold molecular beam. Initial survey search scans were guided by rotational constants obtained through quantum chemical calculations performed at the...

When a solid body is freely rotating at an angular velocity Ω, the ellipsoid of constant angular momentum, in the space Ω1, Ω2, Ω3, has poles corresponding to spinning about the minimal-inertia and maximal-inertia axes. The first pole may be considered stable if we neglect the inner dissipation, but becomes unstable if the dissipation is taken into account. This happens because the bodies dissi...