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Synthetic fractional flux quanta in a ring of superconducting qubits
Luca Chirolli, Juan Polo, Gianluigi Catelani +1
A ring of capacitively coupled transmons threaded by a synthetic magnetic field is studied as a realization of a strongly interacting bosonic system. The synthetic flux is imparted…
Tunable superconducting flux qubits with long coherence times
T. Chang, T. Cohen, I. Holzman +2
In this work, we study a series of tunable flux qubits inductively coupled to a coplanar waveguide resonator fabricated on a sapphire substrate. Each qubit includes an asymmetric s…
Quasiparticles in superconducting qubits with asymmetric junctions
Giampiero Marchegiani, Luigi Amico, Gianluigi Catelani
Designing the spatial profile of the superconducting gap -- gap engineering -- has long been recognized as an effective way of controlling quasiparticles in superconducting devices…
Charge dynamics in quantum-circuit refrigeration: thermalization and microwave gain
Hao Hsu, Matti Silveri, Vasilii Sevriuk +2
Previous studies of photon-assisted tunneling through normal-metal-insulator-superconductor junctions have exhibited potential for providing a convenient tool to control the dissip…
Long-range exchange interaction between spin qubits mediated by a superconducting link at finite magnetic field
Lucia Gonzalez Rosado, Fabian Hassler, Gianluigi Catelani
Solid state spin qubits are promising candidates for the realization of a quantum computer due to their long coherence times and easy electrical manipulation. However, spin-spin in…
Bogoliubov Quasiparticles in Superconducting Qubits
Leonid I. Glazman, Gianluigi Catelani
Extending the qubit coherence times is a crucial task in building quantum information processing devices. In the three-dimensional cavity implementations of circuit QED, the cohere…