Suppressing Charge Noise Decoherence in Superconducting Charge Qubits

By J. Schreier, Andrew A. Houck, Jens Koch, David I. Schuster, Blake R. Johnson, Jerry M. Chow, Jay M. Gambetta, J. Majer, Luigi Frunzio, Michel H. Devoret and 2 more. 2007

497 citations recorded by the source corpus.

We present an experimental realization of the transmon qubit, which is an improved superconducting charge qubit derived from the Cooper pair box. We experimentally verify the predicted exponential suppression of sensitivity to $1∕f$ charge noise. This removes the leading source of dephasing in charge qubits which results in homogeneously broadened transitions with relaxation and dephasing times in the microsecond range. Our systematic characterization of the qubit spectrum, anharmonicity, and charge dispersion shows excellent agreement with theory.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/d72586f8ea9908033fbe6291942a159f05525ab5

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Citations in the corpus

Quantum computers (2010, unknown): “1 and named ‘quantronium’ 72 and ‘transmon’ 73 .”
Circuit quantum electrodynamics (2010, background): “Fabrication of the sample followed the description given in [43].”
Observation of a Dissipative Phase Transition in a One-Dimensional Circuit QED Lattice (2016, background): “6ð2Þ GHz, coupled to a transmon qubit [21] [Fig.”
Low-Disorder Microwave Cavity Lattices for Quantum Simulation with Photons (2012, background): “Here the anharmonicity is also shown to decrease, but for values of 100 > Ej/Ec > 50, the absolute anharmonicity is proportional to Ec, as observed in [90].”