title: Optimal quantum control of multimode couplings between trapped ion qubits for scalable entanglement.
abstract: We demonstrate entangling quantum gates within a chain of five trapped ion qubits by optimally shaping optical fields that couple to multiple collective modes of motion. We individually address qubits with segmented optical pulses to construct multipartite entangled states in a programmable way. This approach enables high-fidelity gates that can be scaled to larger qubit registers for quantum computation and simulation.
authors.affiliation: Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742, USA.
authors.forename: T
authors.initials: T
authors.lastname: Choi
authors.affiliation: Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742, USA.
authors.forename: S
authors.initials: S
authors.lastname: Debnath
authors.affiliation: Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742, USA.
authors.forename: T A
authors.initials: TA
authors.lastname: Manning
authors.affiliation: Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742, USA.
authors.forename: C
authors.initials: C
authors.lastname: Figgatt
authors.affiliation: Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742, USA and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Z-X
authors.initials: ZX
authors.lastname: Gong
authors.affiliation: Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: L-M
authors.initials: LM
authors.lastname: Duan
authors.affiliation: Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742, USA.
authors.forename: C
authors.initials: C
authors.lastname: Monroe