Dynamical decoupling of two-level systems by quantum Zeno effect*

The lifetime of superconducting qubits is currently limited by losses from tunneling two-level systems (TLSs) in the amorphous oxide layers. Recent experiments indicate that qubit decay is dominated by several TLSs that are near-resonant with the qubit. In this presentation, we propose to decouple those TLSs from the qubit by exploiting the quantum Zeno effect. We provide numerical evidence of improved qubit lifetime, and comment on possible experimental realizations.