5 papers
Fast, high-fidelity Transmon readout with intrinsic Purcell protection via nonperturbative cross-Kerr coupling
Guillaume Beaulieu, Jun-Zhe Chen, Marco Scigliuzzo +5
Dispersive readout of superconducting qubits relies on a transverse capacitive coupling that hybridizes the qubit with the readout resonator, subjecting the qubit to Purcell decay…
Balanced cross-Kerr coupling for superconducting qubit readout
Alex A. Chapple, Othmane Benhayoune-Khadraoui, Simon Richer +1
Dispersive readout, the standard method for measuring superconducting qubits, is limited by multiphoton qubit-resonator processes arising even at moderate drive powers. These proce…
Enabling Technologies for Scalable Superconducting Quantum Computing
Xanthe Croot, Kasra Nowrouzi, Christopher Spitzer +21
Experiments with superconducting quantum processors have successfully demonstrated the basic functions needed for quantum computation and evidence of utility, albeit without a siza…
How the Kerr-Cat Qubit Dies -- And How to Rescue It
Othmane Benhayoune-Khadraoui, Cristóbal Lledó, Alexandre Blais
Kerr-cat qubits have been experimentally shown to exhibit a large noise bias, with one decay channel suppressed by several orders of magnitude. In superconducting implementations,…
Quantum sensing of displacements with stabilized GKP states
Lautaro Labarca, Sara Turcotte, Alexandre Blais +1
We demonstrate how recent protocols developed for the stabilization of Gottesman-Kitaev-Preskill (GKP) states can be used for the estimation of two-quadrature displacement sensing,…