153 citations · 552 across the 15 of their papers we have counts for
8 papers · 1 filter
Detection of weak microwave fields with an underdamped Josephson junction
G. Oelsner, C. K. Andersen, M. Rehák +6
We have constructed a microwave detector based on the voltage switching of an underdamped Josephson junction, that is positioned at a current antinode of a λ/4 coplanar waveguide r…
Two-photon lasing by a superconducting qubit
P. Neilinger, M. Rehák, M. Grajcar +3
We study the response of a magnetic-field-driven superconducting qubit strongly coupled to a superconducting coplanar waveguide resonator. We observed a strong amplification/dampin…
Finite quasiparticle lifetime in disordered superconductors
M. Žemlička, P. Neilinger, M. Trgala +8
We investigate the complex conductivity of a highly disordered MoC superconducting film with , where is the Fermi wavenumber and is the mean free path, der…
Parametric amplification by coupled flux qubits
M. Rehak, P. Neilinger, M. Grajcar +4
We report the parametric amplification of a microwave signal in a Kerr medium formed from superconducting qubits. Two mutually coupled flux qubits, embedded in the current antinode…
Dressed-state amplification by a superconducting qubit
G. Oelsner, P. Macha, O. V. Astafiev +6
We demonstrate amplification of a microwave signal by a strongly driven two-level system in a coplanar waveguide resonator. The effect known from optics as dressed-state lasing is…
Spectroscopy of a Qubit Array via a Single Transmission Line
M. Jerger, S. Poletto, P. Macha +4
Frequency-selective readout for superconducting qubits opens the way towards scaling qubit circuits up without increasing the number of measurement lines. Here we demonstrate the r…
Weak continuous monitoring of a flux qubit using coplanar waveguide resonator
G. Oelsner, S. H. W. van der Ploeg, P. Macha +9
We study a flux qubit in a coplanar waveguide resonator by measuring transmission through the system. In our system with the flux qubit decoupled galvanically from the resonator, t…
Adiabatic quantum computation with flux qubits, first experimental results
S. H. W. van der Ploeg, A. Izmalkov, M. Grajcar +10
Controllable adiabatic evolution of a multi-qubit system can be used for adiabatic quantum computation (AQC). This evolution ends at a configuration where the Hamiltonian of the sy…