title: Stabilizing Entanglement via Symmetry-Selective Bath Engineering in Superconducting Qubits.
abstract: 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.
authors.affiliation: Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Kimchi-Schwartz
authors.affiliation: Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: L
authors.initials: L
authors.lastname: Martin
authors.affiliation: Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: E
authors.initials: E
authors.lastname: Flurin
authors.affiliation: Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.|Laboratoire de Physique Théorique, École Normale Supérieure, CNRS, Paris, France.|Instituut voor Theoretische Fysica, KU Leuven, Belgium.
authors.forename: C
authors.initials: C
authors.lastname: Aron
authors.affiliation: Department of Physics, New York City College of Technology, The City University of New York, Brooklyn, New York 11201, USA.
authors.forename: M
authors.initials: M
authors.lastname: Kulkarni
authors.affiliation: Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: H E
authors.initials: HE
authors.lastname: Tureci
authors.affiliation: Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: I
authors.initials: I
authors.lastname: Siddiqi