Resonant Higgs drive generates a divergent negative superfluid density, driving homogeneous superconductors toward spatial phase separation.
The time-dependent superfluid density canbefoundfromEqs.(7, 8) j (t) ≡ −ns(t) m A
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Negative superfluid density and spatial instabilities in driven superconductors
Resonant Higgs drive generates a divergent negative superfluid density, driving homogeneous superconductors toward spatial phase separation.