532 citations · 4.4k across the 38 of their papers we have counts for
17 papers · 1 filter
Radio-frequency characterization of a supercurrent transistor made from a carbon nanotube
M. Mergenthaler, F. J. Schupp, A. Nersisyan +6
A supercurrent transistor is a superconductor-semiconductor hybrid device in which the Josephson supercurrent is switched on and off using a gate voltage. While such devices have b…
Strong coupling of microwave photons to antiferromagnetic fluctuations in an organic magnet
M. Mergenthaler, J. Liu, J. J. Le Roy +10
Coupling between a crystal of di(phenyl)-(2,4,6-trinitrophenyl)iminoazanium radicals and a superconducting microwave resonator is investigated in a circuit quantum electrodynamics…
Quantum Acoustics with Surface Acoustic Waves
Thomas Aref, Per Delsing, Maria K. Ekström +6
It has recently been demonstrated that surface acoustic waves (SAWs) can interact with superconducting qubits at the quantum level. SAW resonators in the GHz frequency range have a…
Excitation and detection of propagating spin waves at the single magnon level
Alexy D. Karenowska, Andrew D. Patterson, Michael J. Peterer +2
Ferro- and ferrimagnets play host to small-signal, microwave-frequency magnetic excitations called spin waves, the quanta of which are known as magnons. Over the last decade, the f…
Quantum dot admittance probed at microwave frequencies with an on-chip resonator
T. Frey, P. J. Leek, M. Beck +5
We present microwave frequency measurements of the dynamic admittance of a quantum dot tunnel coupled to a two-dimensional electron gas. The measurements are made via a high-qualit…
Dipole coupling of a double quantum dot to a microwave resonator
T. Frey, P. J. Leek, M. Beck +4
Quantum coherence in solid-state systems has been demonstrated in superconducting circuits and in semiconductor quantum dots. This has paved the way to investigate solid-state syst…
Characterization of a microwave frequency resonator via a nearby quantum dot
T. Frey, P. J. Leek, M. Beck +3
We present measurements of a hybrid system consisting of a microwave transmission-line resonator and a lateral quantum dot defined on a GaAs heterostructure. The two subsystems are…
Cavity QED with separate photon storage and qubit readout modes
P. J. Leek, M. Baur, J. M. Fink +4
We present the realization of a cavity quantum electrodynamics setup in which photons of strongly different lifetimes are engineered in different harmonic modes of the same cavity.…
Dynamics of dispersive single qubit read-out in circuit quantum electrodynamics
R. Bianchetti, S. Filipp, M. Baur +6
The quantum state of a superconducting qubit nonresonantly coupled to a transmission line resonator can be determined by measuring the quadrature amplitudes of an electromagnetic f…
Climbing the Jaynes-Cummings Ladder and Observing its Sqrt(n) Nonlinearity in a Cavity QED System
J. M. Fink, M. Goeppl, M. Baur +4
The already very active field of cavity quantum electrodynamics (QED), traditionally studied in atomic systems, has recently gained additional momentum by the advent of experiments…
Measurement of Autler-Townes and Mollow transitions in a strongly driven superconducting qubit
M. Baur, S. Filipp, R. Bianchetti +6
We present spectroscopic measurements of the Autler-Townes doublet and the sidebands of the Mollow triplet in a driven superconducting qubit. The ground to first excited state tran…
Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits
P. J. Leek, S. Filipp, P. Maurer +6
We demonstrate time resolved driving of two-photon blue sideband transitions between superconducting qubits and a transmission line resonator. Using the sidebands, we implement a p…
Two-Qubit State Tomography using a Joint Dispersive Read-Out
S. Filipp, P. Maurer, P. J. Leek +8
Quantum state tomography is an important tool in quantum information science for complete characterization of multi-qubit states and their correlations. Here we report a method to…
Dressed Collective Qubit States and the Tavis-Cummings Model in Circuit QED
J. M. Fink, R. Bianchetti, M. Baur +6
We present an ideal realization of the Tavis-Cummings model in the absence of atom number and coupling fluctuations by embedding a discrete number of fully controllable superconduc…
Charge pumping in carbon nanotube quantum dots
M. R. Buitelaar, V. Kashcheyevs, P. J. Leek +6
We investigate charge pumping in carbon nanotube quantum dots driven by the electric field of a surface acoustic wave. We find that at small driving amplitudes, the pumped current…
Observation of Berry's Phase in a Solid State Qubit
P. J. Leek, J. M. Fink, A. Blais +7
In quantum information science, the phase of a wavefunction plays an important role in encoding information. While most experiments in this field rely on dynamic effects to manipul…
Charge Pumping in Carbon Nanotubes
Peter Leek, Mark Buitelaar, Valery Talyanskii +5
We demonstrate charge pumping in semiconducting carbon nanotubes by a traveling potential wave. From the observation of pumping in the nanotube insulating state we deduce that tran…