  Similar to the cases of anemone jets, two-sided loop solar jets could also be
produced by either flux emergence from the solar interior or small scale
filament eruptions. Using the high-quality data from the Solar Dynamic
Observatory (SDO), we analyzed a two-sided loop solar jet triggered by the
eruption of a small filament in this paper. The jet was occurred in a
pre-existing big filament channel. The detailed processes involved in the small
filament eruption, the interaction between the erupted filament and the big
filament channel, and the launch of the two-sided loop jet are presented. The
observations further revealed notable asymmetry between the two branches of the
jet spire, with the northeastern branch is narrow and short, while the southern
branch is wide and long and accompanied by discernible untwisting motions. We
explored the unique appearance of the jet by employing the local potential
field extrapolation to calculate the coronal magnetic field configuration
around the jet. The photospheric magnetic flux below the small filament
underwent cancellation for approximately 7 hours before the filament eruption,
and the negative flux near the southern foot-point of the filament decreased by
about 56 percent during this interval. Therefore, we proposed that the primary
photospheric driver of the filament eruption and the associated two-sided loop
jet in this event is flux cancellation rather than flux emergence.
