TY - JOUR
T1 - Broadband continuous variable entanglement generation using Kerr-free Josephson metamaterial
AU - Perelshtein, Mikhail
AU - Petrovnin, Kirill
AU - Vesterinen, Visa
AU - Hamedani Raja, Sina
AU - Lilja, Ilari
AU - Will, Marco
AU - Savin, Alexander
AU - Simbierowicz, Slawomir
AU - Najafi Jabdaraghi, Robab (Leila)
AU - Lehtinen, Janne
AU - Grönberg, Leif
AU - Hassel, Juha
AU - Prunnila, Mika
AU - Govenius, Joonas
AU - Paraoanu, Gheorghe-Sorin
AU - Hakonen, Pertti J.
PY - 2021/11
Y1 - 2021/11
N2 - 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±0.7 dB below the zero-point level at half of modulation frequency.
AB - 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±0.7 dB below the zero-point level at half of modulation frequency.
M3 - Article
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
ER -