{"type":"journal_article","doi":"10.1103/PhysRevLett.107.113601","volume":107,"publication_status":"published","publisher":"American Physical Society","author":[{"first_name":"Christopher","full_name":"Eichler, Christopher","last_name":"Eichler"},{"full_name":"Bozyigit, Deniz","first_name":"Deniz","last_name":"Bozyigit"},{"full_name":"Lang, C","first_name":"C","last_name":"Lang"},{"last_name":"Baur","full_name":"Baur, Matthias P","first_name":"Matthias"},{"full_name":"Steffen, L. Kraig","first_name":"L.","last_name":"Steffen"},{"last_name":"Fink","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8112-028X","full_name":"Johannes Fink","first_name":"Johannes M"},{"full_name":"Filipp, Stefan","first_name":"Stefan","last_name":"Filipp"},{"first_name":"Andreas","full_name":"Wallraff, Andreas","last_name":"Wallraff"}],"extern":1,"quality_controlled":0,"status":"public","abstract":[{"lang":"eng","text":"Continuous variable entanglement between two modes of a radiation field is usually studied at optical frequencies. Here we demonstrate experiments that show the entanglement between microwave photons of different energy in a broadband squeezed beam. We use a Josephson parametric amplifier to generate the two-mode correlated state and detect all four quadrature components simultaneously in a two-channel heterodyne setup using amplitude detectors. Analyzing two-dimensional phase space histograms for all possible pairs of quadratures allows us to determine the full covariance matrix, which is in good agreement with the one expected for a two-mode squeezed state."}],"date_published":"2011-09-06T00:00:00Z","issue":"11","publist_id":"5334","intvolume":"       107","publication":"Physical Review Letters","year":"2011","_id":"1780","acknowledgement":"This work was supported by the European Research Council (ERC) through a Starting grant and by ETHZ. S. F. acknowledges the Austrian Science Foundation (FWF) for support","title":"Observation of two-mode squeezing in the microwave frequency domain","day":"06","date_created":"2018-12-11T11:53:58Z","date_updated":"2021-01-12T06:53:09Z","month":"09","citation":{"short":"C. Eichler, D. Bozyigit, C. Lang, M. Baur, L. Steffen, J.M. Fink, S. Filipp, A. Wallraff, Physical Review Letters 107 (2011).","ista":"Eichler C, Bozyigit D, Lang C, Baur M, Steffen L, Fink JM, Filipp S, Wallraff A. 2011. Observation of two-mode squeezing in the microwave frequency domain. Physical Review Letters. 107(11).","apa":"Eichler, C., Bozyigit, D., Lang, C., Baur, M., Steffen, L., Fink, J. M., … Wallraff, A. (2011). Observation of two-mode squeezing in the microwave frequency domain. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.107.113601\">https://doi.org/10.1103/PhysRevLett.107.113601</a>","mla":"Eichler, Christopher, et al. “Observation of Two-Mode Squeezing in the Microwave Frequency Domain.” <i>Physical Review Letters</i>, vol. 107, no. 11, American Physical Society, 2011, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.107.113601\">10.1103/PhysRevLett.107.113601</a>.","ama":"Eichler C, Bozyigit D, Lang C, et al. Observation of two-mode squeezing in the microwave frequency domain. <i>Physical Review Letters</i>. 2011;107(11). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.107.113601\">10.1103/PhysRevLett.107.113601</a>","chicago":"Eichler, Christopher, Deniz Bozyigit, C Lang, Matthias Baur, L. Steffen, Johannes M Fink, Stefan Filipp, and Andreas Wallraff. “Observation of Two-Mode Squeezing in the Microwave Frequency Domain.” <i>Physical Review Letters</i>. American Physical Society, 2011. <a href=\"https://doi.org/10.1103/PhysRevLett.107.113601\">https://doi.org/10.1103/PhysRevLett.107.113601</a>.","ieee":"C. Eichler <i>et al.</i>, “Observation of two-mode squeezing in the microwave frequency domain,” <i>Physical Review Letters</i>, vol. 107, no. 11. American Physical Society, 2011."}}