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Broadband continuous variable entanglement generation using Kerr-free Josephson metamaterial
Michael Perelshtein,Kirill Petrovnin,Visa Vesterinen,Sina Hamedani Raja,Ilari Lilja,Marco Will,Alexander Savin,Slawomir Simbierowicz,Robab (Leila) Najafi Jabdaraghi,J. S. Lehtinen,Leif Grönberg,Juha Hassel,Mika Prunnila,Joonas Govenius,Sorin Paraoanu,Pertti Hakonen +15 more
TLDR
In this paper, a low-loss Josephson metamaterial comprising superconducting non-linear asymmetric inductive elements was used to generate frequency (colour) entangled photons from vacuum fluctuations at a rate of 11 mega entangled bits per second with a potential rate above gigabit per second.Abstract:
Entangled microwave photons form a fundamental resource for quantum information processing and sensing with continuous variables. We use a low-loss Josephson metamaterial comprising superconducting non-linear asymmetric inductive elements to generate frequency (colour) entangled photons from vacuum fluctuations at a rate of 11 mega entangled bits per second with a potential rate above gigabit per second. The device is operated as a traveling wave parametric amplifier under Kerr-relieving biasing conditions. Furthermore, we realize the first successfully demonstration of single-mode squeezing in such devices - $2.4\pm0.7$ dB below the zero-point level at half of modulation frequency.read more
Citations
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Broadband squeezed microwaves and amplification with a Josephson travelling-wave parametric amplifier
Jack Y. Qiu,Arne L. Grimsmo,Kai Bei Peng,Bharath Kannan,Benjamin Lienhard,Youngje Sung,Philip Krantz,Vladimir Bolkhovsky,Greg Calusine,David Kim,A. Melville,Bethany Niedzielski,Jonilyn Yoder,Mollie Schwartz,Terry P. Orlando,Irfan Siddiqi,Simon Gustavsson,Kevin O'Brien,William D. Oliver +18 more
TL;DR: In this article , a dual-pump, broadband Josephson traveling-wave parametric amplifier that combines a phase-sensitive extinction ratio of 56 dB with single-mode squeezing on par with the best resonator-based squeezers is presented.
Journal ArticleDOI
Three-wave mixing traveling-wave parametric amplifier with periodic variation of the circuit parameters
Anita Fadavi Roudsari,Daryoush Shiri,Hampus Nilsson,Giovanna Tancredi,Amr Osman,Ida-Maria Svensson,Marina Kudra,Marcus Rommel,Jonas Bylander,Vitaly Shumeiko,Per Delsing +10 more
TL;DR: In this article, a nearquantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM) is presented, which uses superconducting nonlinear asymmetric inductive element (SNAIL) loops biased with a dc magnetic flux.
Journal ArticleDOI
Numerical analysis of a three-wave-mixing Josephson traveling-wave parametric amplifier with engineered dispersion loadings
TL;DR: In this paper , the authors proposed a traveling-wave parametric amplifier (JTWPA) based on a ladder transmission line consisting of radio-frequency superconducting quantum interference devices and exploiting three-wave mixing.
Journal ArticleDOI
Generation and Structuring of Multipartite Entanglement in a Josephson Parametric System
K. V. Petrovnin,M. R. Perelshtein,Tero Korkalainen,Visa Vesterinen,I. Lilja,Gheorghe Sorin Paraoanu,Pertti Hakonen +6 more
TL;DR: In this article , the phase difference between two continuous pump tones is used to generate a tripartite entanglement of a generalized H-graph state, which is then used to control the subspaces of the covariance matrix for a bisqueezed state.
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