Quantum spin liquid (QSL) is an exotic phase of matter and provides an interesting example of emergent non-locality. Even though many materials have been proposed as candidates for QSLs, there is no direct confirmation of QSLs in any of these systems. Quantum spin ice (QSI) is a physical realization of U(1) QSLs on the pyrochlore lattice.

We consider a class of
electron systems in which dipolar-octupolar Kramers doublets arise on the pyrochlore lattice. In
the localized limit, the Kramers doublets are described by the effective spin 1/2 pseudospins.
The most general nearest-neighbor exchange model between these pseudospins is the XYZ
model. We show that this XYZ model exhibit two distinct
**
symmetry
**
**
enriched
**
QSI phases, that we dub dipolar QSI and
octupolar QSI. This XYZ model is absent from the notorious
**
sign
problem
**
for a quantum Monte Carlo simmulation in a large
parameter space. We also
discuss the potential relevance to real material systems.