23 citations · 38 across the 8 of their papers we have counts for
9 papers
Performance optimization of cascaded traveling wave Josephson parametric amplifiers
Ilari Lilja, Ekaterina Mukhanova, Stanislav Khaldeev +3
Traveling-wave parametric amplifiers (TWPAs) based on Josephson metamaterials provide broadband gain with near-quantum-limited added noise. Whereas long nonlinear metamaterial devi…
Phase-sensitive cascade quantum amplifier with nearly noiseless operation
Ilari Lilja, Ekaterina Mukhanova, Michael Perelshtein +5
Phase-sensitive parametric devices enable quadrature-selective amplification with the potential for sub-quantum-limited noise performance. In this work, we investigate the operatio…
Bipartite entanglement under frequency comb pumping in parametric Josephson circuits
Mikael Vartiainen, Ilari Lilja, Ekaterina Mukhanova +3
The creation of high-quality cluster states in superconducting microwave circuits is a relevant ingredient in continuous-variable quantum computing. Although large-scale cluster st…
1/f frequency fluctuations due to kinetic inductance in CoSi microwave cavities
Weijun Zeng, Ilari Lilja, Ekaterina Mukhanova +5
Cobalt disilicide provides a promising nearly-epitaxial superconducting material on silicon, which is compatible with high-density integrated circuit technology. We have characteri…
Kinetic inductance in superconducting CoSi coplanar microwave transmission lines
Ekaterina Mukhanova, Weijun Zeng, Elica Anne Heredia +5
We have looked into cobalt disilicide (CoSi) as a potential building block for superconducting quantum circuits. In order to achieve this, we annealed a thin layer of Co to cre…
Switching dynamics in Al/InAs nanowire-based gate-controlled superconducting switch
Tosson Elalaily, Martin Berke, Ilari Lilja +8
The observation of the gate-controlled supercurrent (GCS) effect in superconducting nanostructures increased the hopes for realizing a superconducting equivalent of semiconductor f…
Generation and structuring of multipartite entanglement in Josephson parametric system
K. V. Petrovnin, M. R. Perelshtein, T. Korkalainen +4
Quantum correlations are a vital resource in advanced information processing based on quantum phenomena. Remarkably, the vacuum state of a quantum field may act as a key element fo…
Broadband continuous variable entanglement generation using Kerr-free Josephson metamaterial
Michael Perelshtein, Kirill Petrovnin, Visa Vesterinen +13
Entangled microwave photons form a fundamental resource for quantum information processing and sensing with continuous variables. We use a low-loss Josephson metamaterial comprisin…
Broadband lumped-element Josephson parametric amplifier with single-step lithography
T. Elo, T. S. Abhilash, M. R. Perelshtein +3
We present a lumped-element Josephson parametric amplifier (JPA) utilizing a straightforward fabrication process involving a single electron beam lithography step followed by doubl…