744 citations · 1.1k across the 6 of their papers we have counts for
6 papers
Probing the strongly driven spin-boson model in a superconducting quantum circuit
L. Magazzù, P. Forn-Díaz, R. Belyansky +6
Quantum two-level systems interacting with the surroundings are ubiquitous in nature. The interaction suppresses quantum coherence and forces the system towards a steady state. Suc…
Broken selection rule in the quantum Rabi model
P. Forn-Díaz, G. Romero, C. J. P. M. Harmans +2
Understanding the interaction between light and matter is very relevant for fundamental studies of quantum electrodynamics and for the development of quantum technologies. The quan…
Driven dynamics and rotary echo of a qubit tunably coupled to a harmonic oscillator
Simon Gustavsson, Jonas Bylander, Fei Yan +18
We have investigated the driven dynamics of a superconducting flux qubit that is tunably coupled to a microwave resonator. We find that the qubit experiences an oscillating field m…
Observation of the Bloch-Siegert Shift in a Qubit-Oscillator System in the Ultrastrong Coupling Regime
P. Forn-Díaz, J. Lisenfeld, D. Marcos +4
We measure the dispersive energy-level shift of an resonator magnetically coupled to a superconducting qubit, which clearly shows that our system operates in the ultrastrong c…
Strong Coupling of a Quantum Oscillator to a Flux Qubit at its Symmetry Point
A. Fedorov, A. K. Feofanov, P. Macha +3
A flux qubit biased at its symmetry point shows a minimum in the energy splitting (the gap), providing protection against flux noise. We have fabricated a qubit whose gap can be tu…
Josephson squelch filter for quantum nanocircuits
P. Forn-Diaz, R. N. Schouten, W. A. den Braver +2
We fabricated and tested a squelch circuit consisting of a copper powder filter with an embedded Josephson junction connected to ground. For small signals (squelch-ON), the small j…