252 citations · 475 across the 6 of their papers we have counts for
7 papers
Observation of the Schmid-Bulgadaev dissipative quantum phase transition
Roman Kuzmin, Nitish Mehta, Nicholas Grabon +4
Although quantum mechanics applies to many macroscopic superconducting devices, one basic prediction remained controversial for decades. Namely, a Josephson junction connected to a…
Tuning the inductance of Josephson junction arrays without SQUIDs
Roman Kuzmin, Nitish Mehta, Nicholas Grabon +1
It is customary to use arrays of superconducting quantum interference devices (SQUIDs) for implementing magnetic field-tunable inductors. Here, we demonstrate an equivalent tunabil…
Inelastic scattering of a photon by a quantum phase-slip
Roman Kuzmin, Nicholas Grabon, Nitish Mehta +5
Spontaneous decay of a single photon is a notoriously inefficient process in nature irrespective of the frequency range. We report that a quantum phase-slip fluctuation in high-imp…
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…
Superstrong coupling in circuit quantum electrodynamics
Roman Kuzmin, Nitish Mehta, Nicholas Grabon +2
Vacuum fluctuations fundamentally affect an atom by inducing a finite excited state lifetime along with a Lamb shift of its transition frequency. Here we report the reverse effect:…
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…
Protecting a superconducting qubit from energy decay by selection rule engineering
Yen-Hsiang Lin, Long B. Nguyen, Nicholas Grabon +3
Quantum control of atomic systems is largely enabled by the rich structure of selection rules in the spectra of most real atoms. Their macroscopic superconducting counterparts have…