329 citations · 560 across the 10 of their papers we have counts for
10 papers
Universal control of a bosonic mode via drive-activated native cubic interactions
Axel M. Eriksson, Théo Sépulcre, Mikael Kervinen +9
Linear bosonic modes offer a hardware-efficient alternative for quantum information processing but require access to some nonlinearity for universal control. The lack of nonlineari…
Quantum process tomography of continuous-variable gates using coherent states
Mikael Kervinen, Shahnawaz Ahmed, Marina Kudra +5
Encoding quantum information into superpositions of multiple Fock states of a harmonic oscillator can provide protection against errors, but it comes with the cost of requiring mor…
Experimental realization of deterministic and selective photon addition in a bosonic mode assisted by an ancillary qubit
Marina Kudra, Martin Jirlow, Mikael Kervinen +5
Bosonic quantum error correcting codes are primarily designed to protect against single-photon loss. To correct for this type of error, one can encode the logical qubit in code spa…
Resolving Fock states near the Kerr-free point of a superconducting resonator
Yong Lu, Marina Kudra, Timo Hillmann +4
We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Nonlinear Asymmetric Inductive eLement). Such a device possesses a sweet spot in which the ext…
Three-wave mixing traveling-wave parametric amplifier with periodic variation of the circuit parameters
Anita Fadavi Roudsari, Daryoush Shiri, Hampus Renberg Nilsson +8
We report the implementation of a near-quantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM). To favor amplification by 3WM, we use the superconduc…
Measurement and control of a superconducting quantum processor with a fully-integrated radio-frequency system on a chip
Mats O. Tholén, Riccardo Borgani, Giuseppe Ruggero Di Carlo +8
We describe a digital microwave platform called Presto, designed for measurement and control of multiple quantum bits (qubits) and based on the third-generation radio-frequency sys…
Robust preparation of Wigner-negative states with optimized SNAP-displacement sequences
Marina Kudra, Mikael Kervinen, Ingrid Strandberg +13
Hosting non-classical states of light in three-dimensional microwave cavities has emerged as a promising paradigm for continuous-variable quantum information processing. Here we ex…
Stability of superconducting resonators: motional narrowing and the role of Landau-Zener driving of two-level defects
David Niepce, Jonathan J. Burnett, Marina Kudra +2
Frequency instability of superconducting resonators and qubits leads to dephasing and time-varying energy-loss and hinders quantum-processor tune-up. Its main source is dielectric…
High Quality 3-Dimensional Aluminum Microwave Cavities
M. Kudra, J. Biznárová, F. Roudsari +5
We present a comprehensive study of internal quality factors in superconducting stub-geometry 3-dimensional cavities made of aluminum. We use wet etching, annealing and electrochem…
Decoherence benchmarking of superconducting qubits
Jonathan Burnett, Andreas Bengtsson, Marco Scigliuzzo +4
We benchmark the decoherence of superconducting qubits to examine the temporal stability of energy-relaxation and dephasing. By collecting statistics during measurements spanning m…