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The magnetization process of a frustrated spin-1/2 spin-dimer model on asquare lattice is investigated by means of a sign-problem-free quantum MonteCarlo algorithm developed recently. Rich field-induced quantum phases arediscovered. We find two spin superfluids satisfying different symmetries uponlayer permutation. There exist as well two solid phases with distinctcheckerboard patterns. Besides, two kinds of spin supersolids are observed overa finite regime of magnetic fields. The latter two phases can be stabilizedwhen small but nonzero spin anisotropy is present. Various field-inducedtransitions among these phases are explored. Our findings may provide guidanceto the search of these interesting quantum phases in real frustrated spin-dimercompounds.

Field-Induced Quantum Phases in Frustrated Spin-Dimer Model: A Sign-Problem-Free Quantum Monte Carlo Study