  Understanding strongly correlated quantum materials, such as high
$T_\textrm{c}$ superconductors, iron-based superconductors, and twisted bilayer
graphene systems, remains to be one of the outstanding challenges in condensed
matter physics. Quantum simulation with ultra-cold atoms in particular optical
lattices, which provide orbital degrees of freedom, is a powerful tool to
contribute new insights to this endeavor. Here, we report the experimental
realization of an unconventional Bose-Einstein condensate of $^{87}$Rb atoms
populating degenerate $p$-orbitals in a triangular optical lattice, exhibiting
remarkably long coherence times. Using time-of-flight spectroscopy, we observe
that this state spontaneously breaks the rotational symmetry and its momentum
spectrum agrees with the theoretically predicted coexistence of exotic stripe
and loop current orders. Like certain strongly correlated electronic systems
with intertwined orders, as high-$T_\textrm{c}$ cuprate superconductors,
twisted bilayer graphene, and the recently discovered chiral density-wave state
in kagome superconductors $\textrm{AV}_3 \textrm{Sb}_5$ (A=K, Rb, Cs), the
newly demonstrated quantum state, in spite of its markedly different energy
scale and the bosonic quantum statistics, exhibits multiple symmetry breakings
at ultralow temperatures. These findings hold the potential to enhance our
comprehension of the fundamental physics governing these intricate quantum
materials.
