David P. Pappas

Publications

Electromagnetically induced transparency in circuit quantum electrodynamics with nested polariton states

February 23, 2018

Author(s):

Junling Long, Hsiang Sheng Ku, Xian Wu, Xiu Gu, Russell E. Lake, Mustafa Bal, Yu-xi Liu, David P. Pappas

Electromagnetically induced transparency (EIT) is a signature of quantum interference in an atomic three-level system. By driving the dressed cavity-qubit...

High coherence plane breaking packaging for superconducting qubits

February 07, 2018

Author(s):

David P. Pappas, Xian Wu, Nicholas T. Bronn, Salvatore B. Olivadese, Vivekananda P. Adiga, Jerry M. Chow

Wedemonstrate a pogo pin package for a superconducting quantum processor specifically designed with a nontrivial layout topology (e.g., a center qubit that...

Electric- field noise from carbon-adatom diffusion on a Au(110) surface: first-principles calculations and experiments

March 09, 2017

Author(s):

E. Kim, A Safavi-Naini, Kyle S. McKay, David P. Pappas, P.F Weck, H.R. Sadeghpour, Dustin A. Hite

The decoherence of trapped-ion quantum bits due to heating of their motional modes is a fundamental science and engineering problem. This heating is attributed...

Theory of Multiwave Mixing within the Superconducting Kinetic-Inductance Traveling-Wave Amplifier

March 06, 2017

Author(s):

David P. Pappas, Robert P. Erickson

We present the theory of parametric mixing within the coplanar waveguide (CPW) of a super- conducting nonlinear kinetic-inductance traveling-wave (KIT) ampli...

Measurements of trapped-ion heating rates with exchangeable surfaces in close proximity

January 15, 2017

Author(s):

Dustin A. Hite, Kyle S. McKay, Shlomi Salman Kotler, Dietrich G. Leibfried, David J. Wineland, David P. Pappas

Electric-field noise from the surfaces of ion-trap electrodes couples to the ions charge causing heating of the ions motional modes. This heating...