Laurent Blanc's side cruised to a 2-0 victory over Olympique de Marseille on Sunday, capitalising on second-placed Monaco's defeat to Saint-Etienne to take a commanding eight-point lead in the French top tier.
PSG are now heavy favourites to retain the title they won last season for the and their star striker doubts any team can catch them before the end of 2013-14.
"We have our destiny in our own hands," Ibrahimovic told Ligue 1's official website. "It all depends on us. We need to keep on getting the job done.
"If we start to relax and not give 100 per cent, we could end up punishing ourselves. But I don't think that another team can stop us. There is only us."
Maxwell and Edinson Cavani, who came off the bench to return from a short spell out injured, scored the goals which secured PSG a Classique victory at the weekend - their fourth in a row.
Ibrahimovic, who has scored 37 goals in all competitions so far this season, hopes the entire team can continue chipping in as they strive for European glory with the club leading 4-0 over Bayer Leverkusen after the last-16 opening leg.
"Cavani was really good, and scored a great header," Ibrahimovic added. "It's great for the team. In the coming months, we have a lot of very important matches, and we'll need everyone.
"We have a great chance of winning the league title. For the Champions League, we had a great first leg. Now we have an advantage, but in the quarter-finals anything can happen."