title: Emulating weak localization using a solid-state quantum circuit.
abstract: Quantum interference is one of the most fundamental physical effects found in nature. Recent advances in quantum computing now employ interference as a fundamental resource for computation and control. Quantum interference also lies at the heart of sophisticated condensed matter phenomena such as Anderson localization, phenomena that are difficult to reproduce in numerical simulations. Here, employing a multiple-element superconducting quantum circuit, with which we manipulate a single microwave photon, we demonstrate that we can emulate the basic effects of weak localization. By engineering the control sequence, we are able to reproduce the well-known negative magnetoresistance of weak localization as well as its temperature dependence. Furthermore, we can use our circuit to continuously tune the level of disorder, a parameter that is not readily accessible in mesoscopic systems. Demonstrating a high level of control, our experiment shows the potential for employing superconducting quantum circuits as emulators for complex quantum phenomena.
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: P
authors.initials: P
authors.lastname: Roushan
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: D
authors.initials: D
authors.lastname: Sank
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: C
authors.initials: C
authors.lastname: Neill
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: Erik
authors.initials: E
authors.lastname: Lucero
authors.affiliation: 1] Department of Physics, University of California, Santa Barbara, California 93106-9530, USA [2] California NanoSystems Institute, University of California, Santa Barbara, California 93106-6105, USA.
authors.forename: Matteo
authors.initials: M
authors.lastname: Mariantoni
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: R
authors.initials: R
authors.lastname: Barends
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: B
authors.initials: B
authors.lastname: Chiaro
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: J
authors.initials: J
authors.lastname: Kelly
authors.affiliation: 1] Department of Physics, University of California, Santa Barbara, California 93106-9530, USA [2] Department of Materials, University of California, Santa Barbara, California 93106-5050, USA.
authors.forename: A
authors.initials: A
authors.lastname: Megrant
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: J Y
authors.initials: JY
authors.lastname: Mutus
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: P J J
authors.initials: PJ
authors.lastname: O'Malley
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: A
authors.initials: A
authors.lastname: Vainsencher
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: J
authors.initials: J
authors.lastname: Wenner
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: T C
authors.initials: TC
authors.lastname: White
authors.affiliation: Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yin
authors.affiliation: 1] Department of Physics, University of California, Santa Barbara, California 93106-9530, USA [2] California NanoSystems Institute, University of California, Santa Barbara, California 93106-6105, USA.
authors.forename: A N
authors.initials: AN
authors.lastname: Cleland
authors.affiliation: 1] Department of Physics, University of California, Santa Barbara, California 93106-9530, USA [2] California NanoSystems Institute, University of California, Santa Barbara, California 93106-6105, USA.
authors.forename: John M
authors.initials: JM
authors.lastname: Martinis