David P. Pappas

Publications

Kinetic Inductance Traveling Wave Amplifiers For Multiplexed Qubit Readout

December 10, 2018

Author(s):

Leonardo Ranzani, K. C. Fong, G. Ribell, Tomas A. Ohki, David P. Pappas, Mustafa Bal, Xian Wu, Robert P. Erickson, Junling Long, Hsiang S. Ku

We describe a kinetic inductance traveling-wave (KIT) amplifier suitable for superconducting quantum information measurements and characterize its wideband...

Mechanisms for carbon adsorption on Au(110)-(2 x 1): A work function analysis

July 17, 2018

Author(s):

Dustin A. Hite, Hossein Jooya, Kyle S. McKay, Eunja Kim, Philippe F. Weck, David P. Pappas, H.R. Sadeghpour

The variation of the work function upon carbon adsorption on the reconstructed Au(110) surface is measured experimentally and compared to density functional...

Enhanced superconducting transition temperature in electroplated rhenium

April 30, 2018

Author(s):

David P. Pappas, Don David, Mustafa Bal, Ilke Arslan, Paul T. Blanchard, Ronald B. Goldfarb, Dustin A. Hite, Hsiang S. Ku, Russell E. Lake, Junling Long, Alexana Roshko, Lee D. Pappas, Britton L. Plourde, Jianguo Wen, Xian Wu, Corey Rae H. McRae

We show that electroplated Re ﬁlms in multilayers with noble metals such as Cu, Au, and Pd have an enhanced superconducting critical temperature...

Electromagnetically induced transparency in circuit quantum electrodynamics with nested polariton states

February 23, 2018

Author(s):

Junling Long, Hsiang S. 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...