Stabilizing Entanglement via Symmetry-Selective Bath Engineering in Superconducting Qubits
Mollie E. Schwartz, Leigh S. Martin, Emmanuel Flurin, Camille Aron, Manas Kulkarni, Hakan E. Türeci, Irfan A. Siddiqi · Physical Review Letters · 2016
Bath engineering, which utilizes coupling to lossy modes in a quantum system to generate nontrivial steady states, is a tantalizing alternative to gate- and measurement-based quantum science. Here, we demonstrate dissipative stabilization of entanglement between two superconducting transmon qubits in a symmetry-selective manner. We utilize the engineered symmetries of the dissipative environment to stabilize a target Bell state; we further demonstrate suppression of the Bell state of opposite symmetry due to parity selection rules. This implementation is resource efficient, achieves a steady-state fidelity F=0.70, and is scalable to multiple qubits.