Topological Burning Glass Effect

Abstract

We reveal a topological burning glass effect, where the local response of a system exhibits a topological quantization that is enhanced by an integer due to its environmental coupling. As a paradigmatic platform for this intriguing phenomenon, we study a central spin that is quasiperiodically driven by two incommensurate frequencies, and statically coupled to $N-1$ surrounding spins. In the strong coupling regime, the adiabatic dynamics of the total system is readily understood to imprint on the central spin an $N$-fold enhanced topological frequency conversion between the two driving frequencies. We argue that the topological burning glass effect is induced by the non-unitary dynamics of the central spin, which locally involves the collective motion of the surrounding spins. Our results are derived in the framework of adiabatic perturbation theory and fully corroborated by exact numerical simulations.

17 pages, 8 figures

References in corpus (5)

• Topological Field Theory of Time-Reversal Invariant Insulators
• Observation of topological transitions in interacting quantum circuits
• Measuring a topological transition in an artificial spin 1/2 system
• Topological and geometrical aspects of band theory
• Dynamical decoupling for realization of topological frequency conversion

Cited by in corpus (2)

• Dissipative frequency converter: from Lindblad dynamics to non-Hermitian topology
• Topological dynamics of adiabatic cat states