$T_1$-echo sequence - Preserving the state of a qubit in the presence of coherent interaction

We propose a sequence of pulses intended to preserve the state of a qubit in the presence of strong, coherent coupling to another quantum system. The sequence can be understood as a generalized SWAP and works in formal analogy to the well-known spin echo. Since the resulting decoherence rate of the qubits state is strongly influenced by the additional system, this sequence might serve to protect its quantum state. A possible area of application would be in superconducting circuits, where often spurious two-level system interact strongly with the qubits and might thus provide the necessary resource.