401 citations · 2.2k across the 16 of their papers we have counts for
15 papers
One hundred second bit-flip time in a two-photon dissipative oscillator
C. Berdou, A. Murani, U. Reglade +19
Current implementations of quantum bits (qubits) continue to undergo too many errors to be scaled into useful quantum machines. An emerging strategy is to encode quantum informatio…
Superconducting circuit protected by two-Cooper-pair tunneling
W. C. Smith, A. Kou, X. Xiao +2
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…
Simultaneous monitoring of fluxonium qubits in a waveguide
A. Kou, W. C. Smith, U. Vool +5
Most quantum-error correcting codes assume that the decoherence of each physical qubit is independent of the decoherence of any other physical qubit. We can test the validity of th…
Degeneracy-preserving quantum non-demolition measurement of parity-type observables for cat-qubits
Joachim Cohen, W. Clarke Smith, Michel H. Devoret +1
A central requirement for any quantum error correction scheme is the ability to perform quantum non-demolition measurements of an error syndrome, corresponding to a special symmetr…
A fluxonium-based artificial molecule with a tunable magnetic moment
A. Kou, W. C. Smith, U. Vool +6
Engineered quantum systems allow us to observe phenomena that are not easily accessible naturally. The LEGO-like nature of superconducting circuits makes them particularly suited f…
Quantization of inductively-shunted superconducting circuits
W. C. Smith, A. Kou, U. Vool +4
We present a method for calculating the energy levels of superconducting circuits that contain highly anharmonic, inductively-shunted modes with arbitrarily strong coupling. Our me…