The heavy-fluxonium circuit is a promising building block for superconducting quantum
processors due to its long relaxation and dephasing time at the flux-frustration point …

Currently available quantum processors are dominated by noise, which severely limits their
applicability and motivates the search for new physical qubit encodings. In this work, we …

Superconducting quantum information processing machines are predominantly based on
microwave circuits with relatively low characteristic impedance, about 100 Ω, and small …

We present a quantum-limited Josephson-junction-based three-wave-mixing parametric
amplifier, the superconducting nonlinear asymmetric inductive element (SNAIL) parametric …

When a quantum system is driven slowly through a parametric cycle in a degenerate Hilbert
space, the state would acquire a non-Abelian geometric phase, which is stable and forms …

Van-der-Waals assembly enables the fabrication of novel Josephson junctions featuring an
atomically sharp interface between two exfoliated and relatively twisted Bi 2 Sr 2 CaCu 2 O …

We characterize a fluxonium qubit consisting of a Josephson junction inductively shunted
with a NbTiN nanowire superinductance. We explain the measured energy spectrum by …

We present a protected superconducting qubit based on an effective circuit element that only
allows pairs of Cooper pairs to tunnel. These dynamics give rise to a nearly degenerate …

We employ quantum optimal control theory to realize quantum gates for two protected
superconducting circuits: the heavy-fluxonium qubit and the 0-π qubit. Utilizing automatic …

Superconducting circuits extensively rely on the Josephson junction as a nonlinear
electronic element for manipulating quantum information and mediating photon interactions …