  Recent numerical simulations find a possible chiral spin liquid state in the
intermediate coupling regime of the triangular lattice Hubbard model. Here we
provide a simple picture for its origin in terms of a Bosonic RVB description.
More specifically, we show that such a chiral spin liquid state can be
understood as a quantum disordered tetrahedral spin state stabilized by the
four spin ring exchange coupling, which suppresses the order-by-disorder effect
toward a stripy spin state. Such a chiral spin liquid state features a spin
Berry phase of $\frac{\pi}{2}$ per triangle. However, we show that the
topological property of such a state is totally missed in the Schwinger Boson
mean field description as a result of the lack of Boson rigidity caused by the
no double occupancy constraint.
