3 papers
cond-mat.supr-con2019
The superconducting quasicharge qubit
Ivan V. Pechenezhskiy, Raymond A. Mencia, Long B. Nguyen +2
The non-dissipative non-linearity of a Josephson junction converts macroscopic superconducting circuits into artificial atoms, enabling some of the best controlled quantum bits (qu…
quant-ph2018
The high-coherence fluxonium qubit
Long B. Nguyen, Yen-Hsiang Lin, Aaron Somoroff +3
We report superconducting fluxonium qubits with coherence times largely limited by energy relaxation and reproducibly satisfying T2 > 100 microseconds (T2 > 300 microseconds in one…
cond-mat.supr-con2018
Quantum electrodynamics of a superconductor-insulator phase transition
Roman Kuzmin, Raymond Mencia, Nicholas Grabon +3
A chain of Josephson junctions implements one of the simplest many-body models undergoing a superconductor-insulator (SI) quantum phase transition between states with zero and infi…