87 citations · 238 across the 12 of their papers we have counts for
13 papers
Multiplexed readout of Superconductor--Normal-Conductor--Superconductor bolometers
Priyank Singh, András Gunyhó, Heikki Suominen +9
Recently, ultrasensitive calorimeters have been proposed as a resource-efficient solution for multiplexed qubit readout in superconducting large-scale quantum processors. However,…
Influence of bias voltage noise on the Inelastic Cooper-Pair Tunneling Amplifier (ICTA)
Ulrich Martel, Romain Albert, Florian Blanchet +7
We experimentally show that the Inelastic Cooper-Pair Tunneling Amplifier (ICTA), implementing a DC-powered parametric amplification scheme, can achieve gain and noise performance…
Microwave photon-number amplification
Romain Albert, Joël Griesmar, Florian Blanchet +3
So far, quantum-limited power meters are not available in the microwave domain, hindering measurement of photon number in itinerant quantum states. On the one hand, single photon d…
Absorptive filters for quantum circuits: Efficient fabrication and cryogenic power handling
Alexandre Paquette, Joël Griesmar, Gabriel Lavoie +5
We present an efficient fabrication method for absorptive microwave filters based on Eccosorb CR-124. Filters are fabricated from readily available parts and their cut-off frequenc…
Radio frequency Coulomb blockade thermometry
Florian Blanchet, Yu-Cheng Chang, Bayan Karimi +2
We present a scheme and demonstrate measurements of a Coulomb blockade thermometer (CBT) in a microwave transmission setup. The sensor is embedded in an resonator, where …
Quantum critical scaling of the conductivity tensor at the metal-insulator transition in NbTiN
D. Hazra, Prosenjit Haldar, M. S. Laad +12
In contrast to the Landau paradigm, a metal-insulator transition (MIT), driven purely by competition between itinerance and localization and unaccompanied by any conventional (e.g,…
Microwave response and electrical transport studies of disordered s wave superconductor: NbN thin films
D. Hazra, S. Jebari, R. Albert +4
It is now well known that the properties of the disordered s wave superconductors can deviate significantly from the prediction of standard Bardeen-Cooper-Schrieffer (BCS) theory.…
A bright on-demand source of anti-bunched microwave photons based on inelastic Cooper pair tunneling
Alexander Grimm, Florian Blanchet, Romain Albert +8
The ability to generate single photons is not only an ubiquitous tool for scientific exploration with applications ranging from spectroscopy and metrology to quantum computing, but…
The role of Coulomb interaction in superconducting NbTiN thin films
D. Hazra, N. Tsavdaris, A. Mukhtarova +9
We report on the superconducting properties of NbTiN thin films of thickness 10 nm, with different Ti fraction in the range , deposited b…
Quantum limited amplification from inelastic Cooper pair tunneling
S. Jebari, F. Blanchet, A. Grimm +7
Nature sets fundamental limits regarding how accurate the amplification of analog signals may be. For instance, a linear amplifier unavoidably adds some noise which amounts to half…
A self-aligned nano-fabrication process for vertical NbN-MgO-NbN Josephson junctions
A. Grimm, S. Jebari, D. Hazra +4
We present a new process for fabricating vertical NbN-MgO-NbN Josephson junctions using self-aligned silicon nitride spacers. It allows for a wide range of junction areas from 0.02…
Multiplying and detecting propagating microwave photons using inelastic Cooper-pair tunneling
Juha Leppäkangas, Michael Marthaler, Dibyendu Hazra +5
The interaction between propagating microwave fields and Cooper-pair tunneling across a DC voltage-biased Josephson junction can be highly nonlinear. We show theoretically that thi…
Superconducting properties of very high quality NbN thin films grown by high temperature chemical vapor deposition
D. Hazra, N. Tsavdaris, S. Jebari +6
Niobium nitride (NbN) is widely used in high-frequency superconducting electronics circuits because it has one of the highest superconducting transition temperatures ( …