Martina Frau (SISSA Trieste)

Disentangling quantum states with Clifford Circuits

Understanding how to efficiently reduce entanglement in quantum many-body systems is an essential problem for classical simulation strategies. In this talk, I will begin by presenting recent results on stabilizer disentangling—a technique based on local Clifford operations—applied to lattice systems described by conformal field theories. This method reveals two distinct disentangling regimes: a constant-gain regime, where entanglement reduction is independent of system size, and a log-gain regime, where the efficiency scales logarithmically with volume, reflecting a reduced effective central charge. Building on these insights, I will then discuss preliminary results showing how incorporating stabilizer disentangling within tensor-network architectures may extend matrix-product states beyond their usual expressive limits, with early indications that the strategy could be promising for simulating open quantum systems dynamics.