{"id":199,"date":"2021-01-09T19:08:24","date_gmt":"2021-01-09T19:08:24","guid":{"rendered":"http:\/\/www.positron.fisi.polimi.it\/?page_id=199"},"modified":"2025-05-19T07:15:09","modified_gmt":"2025-05-19T07:15:09","slug":"quplas","status":"publish","type":"page","link":"https:\/\/www.positron.fisi.polimi.it\/","title":{"rendered":"QUPLAS"},"content":{"rendered":"\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-ad2f72ca wp-block-group-is-layout-flex\">\n<h3 class=\"wp-block-heading\"><strong>QUPLAS: QUantum<\/strong> <strong>interferometry and gravity withPositrons and LASers<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image is-style-rounded\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2021\/01\/PW-breakthrough-icon-top10-2019-635x631-2.png?w=525&#038;ssl=1\" alt=\"\"\/><\/figure>\n<\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-ad2f72ca wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\"><strong>Collaboration Team<\/strong><\/h2>\n\n\n\n<p><em><strong>M. Bayo, A. Calloni, A. Galanti, R. Ferragut, M. Leone<\/strong><\/em><br>Dipartimento di Fisica del Politecnico di Milano and INFN Milano<br><em><strong>M. Giammarchi, G. Maero, M. Rom\u00e9, V. Tos<\/strong><\/em><strong><em>o<\/em>, F. Triggiani<\/strong><br>Dipartimento di Fisica dell\u2019Universit\u00e0 degli Studi and INFN Sezione di Milano<br><em><strong>G. Rosi, L. Salvi, G.M. Tino, G. Vinelli<\/strong><\/em><br>LENS, Universit\u00e0 di Firenze e INFN Firenze<br><em><strong>A. Simonetto<\/strong><\/em><br>Istituto per la Scienza e Tecnologia del Plasmi del CNR, Milano<br><em><strong>L. Venturelli<\/strong><\/em><br>Dipartimento di Ing. dell\u2019Informazione dell\u2019Universit\u00e0 degli Studi di Brescia and INFN Pavia<br><em><strong>M. Beleggia, G. Gazzadi, V. Grillo, S. Frabboni<\/strong><\/em><br>Dip. FIM dell\u2019Universit\u00e0 di Modena e Reggio Emilia e CNR Istituto di Nanoscienze Modena<br><em><strong>A. Alexandrov, G. De Lellis, V. Tioukov<\/strong><\/em><br>Dipartimento di Fisica dell\u2019Universit\u00e0 Federico II and INFN Napoli<br><em><strong>T. Asada, N. D\u2019Ambrosio<\/strong><\/em><br>Laboratorio Nazionale del Gran Sasso<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n<p>01.02.25: M. Sacerdoti, V. Toso, G. Vinelli, M. Bayo, G. Rosi, L. Salvi, G. M. Tino, M. Giammarchi, R. Ferragut. Monte Carlo simulations towards the formation of a positronium coherent beam.&nbsp;<em>Nucl. Instrum. Methods Phys. Res. A<\/em>,&nbsp;<strong>1071<\/strong>, 170068 (2025). doi:&nbsp;<a href=\"https:\/\/doi.org\/10.1016\/j.nima.2024.170068\">10.1016\/j.nima.2024.170068<\/a>&nbsp;<strong><a href=\"https:\/\/re.public.polimi.it\/retrieve\/aa65e94c-012d-4222-8cd4-fcc489ced14d\/Sacerdoti_et_al_NIMA_2025.pdf\">pdf<\/a><\/strong><\/p>\n\n\n\n<p>27.12.23: F. Castelli, S. Cialdi, G. Costantini, R. Ferragut, M. Giammarchi, G. Gittini, M. Leone, G. Maero, S. Olivares, M. Rom\u00e9, A. Simonetto, V. Toso. Loss and revival of coherence in the interaction between a positron beam and a photon field. Journal of Plasma Physics, 89(6) 935890603 (2023). doi:&nbsp;<a href=\"https:\/\/doi.org\/10.1017\/S0022377823001319\">10.1017\/S0022377823001319<\/a>&nbsp;<strong><a href=\"https:\/\/drive.google.com\/file\/d\/1wzE3c_gCFjqzK4E2p42u0W6GS64JMbsy\/view?usp=sharing\">pdf<\/a><\/strong><\/p>\n\n\n\n<p>29.09.23: G. Vinelli, F. Castelli, R. Ferragut, M. Rom\u00e9, M. Sacerdoti, L. Salvi, V. Toso, M. Giammarchi, G. Rosi, G. M. Tino. A large-momentum-transfer matter-wave interferometer to measure the effect of gravity on positronium.&nbsp;<em>Class. Quantum Grav.<\/em>&nbsp;<strong>40<\/strong>&nbsp;205024 (2023) doi:&nbsp;<a href=\"https:\/\/iopscience.iop.org\/article\/10.1088\/1361-6382\/acf8ab\">10.1088\/1361-6382\/acf8ab<\/a>&nbsp;<strong><a href=\"https:\/\/iopscience.iop.org\/article\/10.1088\/1361-6382\/acf8ab\/pdf\">pdf<\/a><\/strong><\/p>\n\n\n\n<p>08.07.21: E. Pasino, S. Cialdi, G. Costantini, R. Ferragut, M. Giammarchi, S. Migliorati, M. Rom\u00e9, T. Savas, V. Toso, An Interferometric Method for Particle Mass Measurements,&nbsp;<em>Symmetry<\/em>&nbsp;<strong>13<\/strong>, 1232 (2021) doi:&nbsp;<a href=\"https:\/\/doi.org\/10.3390\/sym13071232\" target=\"_blank\" rel=\"noreferrer noopener\">10.3390\/sym13071232<\/a>&nbsp;<strong><a href=\"https:\/\/drive.google.com\/file\/d\/1jnbwUgKZ_RFDDFf5xLdGycW4O9T66ThS\/view?usp=drive_link\" target=\"_blank\" rel=\"noreferrer noopener\">pdf<\/a><\/strong><\/p>\n\n\n\n<p>23.11.20: G. Vinelli, R. Ferragut, M. Giammarchi, G. Maero, M. Rom\u00e9, V. Toso.&nbsp;Real-time monitoring of a positron beam using a microchannel plate in single-particle mode,&nbsp;<em>JINST&nbsp;<\/em><strong>15<\/strong>, P11030 (2020) doi:&nbsp;<a href=\"https:\/\/iopscience.iop.org\/article\/10.1088\/1748-0221\/15\/11\/P11030\" target=\"_blank\" rel=\"noreferrer noopener\">10.1088\/1748-0221\/15\/11\/P11030<\/a>&nbsp;<strong><a href=\"https:\/\/drive.google.com\/file\/d\/1IJVxs5-Z2rOhYVcVD3T8Mp4sRdRwvNMA\/view?usp=sharing\" target=\"_blank\" rel=\"noreferrer noopener\">pdf<\/a><\/strong>&nbsp;<\/p>\n\n\n\n<p>26.03.20: L. Anzi, A. Ariga, A. Ereditato, R. Ferragut, M. Giammarchi, G. Maero, C. Pistillo, M. Rom\u00e9, P. Scampoli, V. Toso.&nbsp;Sensitivity of emulsion detectors to low energy positrons,&nbsp;<em>JINST<\/em>&nbsp;<strong>15<\/strong>, P03027 (2020) doi:&nbsp;<a href=\"https:\/\/iopscience.iop.org\/article\/10.1088\/1748-0221\/15\/03\/P03027\" target=\"_blank\" rel=\"noreferrer noopener\">10.1088\/1748-0221\/15\/03\/P03027<\/a>&nbsp;<strong><a href=\"https:\/\/drive.google.com\/file\/d\/12sj_fuvFinYbCWl-6bxFqGTKA9NJK6P4\/view?usp=drive_link\" target=\"_blank\" rel=\"noreferrer noopener\">pdf<\/a><\/strong><\/p>\n\n\n\n<p>21.01.20: A.Ariga, S.Cialdi, G.Costantini, A.Ereditato, R.Ferragut, M.Giammarchi, M.Leone, G.Maero, L.Miramonti, C.Pistillo, M.Rom\u00e9, S.Sala, P.Scampoli, V.Toso,&nbsp;The QUPLAS experimental apparatus for antimatter interferometry,&nbsp;<em>Nucl. Instrum. Methods Phys. Res. A<\/em>&nbsp;<strong>951<\/strong>, 163019 (2020) doi:&nbsp;<a href=\"https:\/\/doi.org\/10.1016\/j.nima.2019.163019\" target=\"_blank\" rel=\"noreferrer noopener\">10.1016\/j.nima.2019.163019<\/a>&nbsp;<strong><a href=\"https:\/\/drive.google.com\/file\/d\/1OniAlzaEHWyX6TmBPADpLxHG0wJFDDJu\/view?usp=drive_link\" target=\"_blank\" rel=\"noreferrer noopener\">pdf<\/a><\/strong><\/p>\n\n\n\n<p>04.12.19:&nbsp; The antimatter interferometry experiment performed in our laboratory is one of the&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/physicsworld.com\/a\/physics-world-announces-its-breakthrough-of-the-year-finalists-for-2019\/\" target=\"_blank\">Top 10 Breakthrough 2019 (physics<\/a><a href=\"https:\/\/sites.google.com\/site\/positronlaboratoryofcomovepas\/visit-the-positron-laboratory\/goog_1219987188\">word<\/a><a rel=\"noreferrer noopener\" href=\"https:\/\/physicsworld.com\/a\/physics-world-announces-its-breakthrough-of-the-year-finalists-for-2019\/\" target=\"_blank\">)<\/a>.<\/p>\n\n\n\n<p>03.05.19:<strong>&nbsp;<\/strong> <a rel=\"noreferrer noopener\" href=\"https:\/\/advances.sciencemag.org\/content\/5\/5\/eaav7610\" target=\"_blank\">First demonstration of antimatter wave interferometry<\/a><em> by S. Sala, A. Ariga, A. Ereditato, R. Ferragut, M. Giammarchi, M. Leone, C. Pistillo and P. Scampoli<\/em><\/p>\n\n\n\n<p><strong>Brief description of this work<\/strong>: <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/sites.google.com\/site\/fotosquplas\/Le%20prime%20onde%20di%20Antimateria_sf.pdf?attredirects=0&amp;d=1\" target=\"_blank\">Italian (breve descrizione in italiano)<\/a><\/strong><br><strong><a rel=\"noreferrer noopener\" href=\"https:\/\/sites.google.com\/site\/fotosquplas\/Las%20primeras%20ondas%20de%20antimateriaVsf.pdf?attredirects=0&amp;d=1\" target=\"_blank\">Spanish (breve descripci\u00f3n en castellano)<\/a><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"525\" height=\"316\" src=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1-1024x617.jpeg?resize=525%2C316&#038;ssl=1\" alt=\"\" class=\"wp-image-765\" srcset=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1.jpeg?resize=1024%2C617&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1.jpeg?resize=300%2C181&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1.jpeg?resize=768%2C463&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1.jpeg?resize=1536%2C925&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1.jpeg?w=1600&amp;ssl=1 1600w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p>The scientific goal of the QUPLAS (QUantum interferometry and gravity with Positrons and LASers) antimatter experiment is the opening of two new fields of investigation in modern particle physics: antimatter interferometry, using both an elementary antiparticle (the positron, e+) and a bound e+\/e- state (positronium, Ps), to test the validity of the fundamental CPT symmetry, and gravitation studies with positronium, an innovative way to inspect the Weak Equivalence Principle with a particle\/antiparticle symmetric system.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"First demonstration of antimatter wave interferometry\" width=\"525\" height=\"295\" src=\"https:\/\/www.youtube.com\/embed\/fO6diL3UwNk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\">Animation based on actual data<\/figcaption><\/figure>\n\n\n\n<p>The first stage of the experiment aims at the comparison of positrons and electrons interference, to compare for the first time the quantum interferometry pattern of a particle with the one of its own antiparticle. To achieve this goal, a dedicated interferometer is being assembled at the VEPAS (Variable Energy Positron Annihilation Spectroscopy) positron beamline located at the L-NESS (Laboratory for Nanostructure Epitaxy and Spintronics on Silicon) Laboratory of the Politecnico di&nbsp;Milano&nbsp;in Como (Italy).<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized is-style-rounded\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"521\" height=\"693\" src=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image.png?resize=521%2C693&#038;ssl=1\" alt=\"\" class=\"wp-image-748\" style=\"width:391px;height:520px\" srcset=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image.png?w=521&amp;ssl=1 521w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image.png?resize=226%2C300&amp;ssl=1 226w\" sizes=\"auto, (max-width: 521px) 100vw, 521px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-small-font-size\">Simone Sala<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized is-style-rounded\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"525\" height=\"718\" src=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1.png?resize=525%2C718&#038;ssl=1\" alt=\"\" class=\"wp-image-750\" style=\"width:540px;height:738px\" srcset=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1.png?w=720&amp;ssl=1 720w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1.png?resize=220%2C300&amp;ssl=1 220w\" sizes=\"auto, (max-width: 525px) 100vw, 525px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-small-font-size\">&nbsp; &nbsp;Rafael Ferragut and Marco Leone<\/p>\n\n\n<div class=\"wp-block-image is-style-rounded\">\n<figure class=\"aligncenter is-resized\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.lhep.unibe.ch\/unibe\/portal\/fak_naturwis\/b_paw\/e_iphy\/abt_lhep\/content\/e405479\/e550349\/e550352\/e551744\/QUPLAS1_eng.png?w=525\" alt=\"quplas-setup-1\" style=\"width:596px;height:518px\"\/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center has-small-font-size\">Experimental set-up<\/p>\n\n\n\n<figure class=\"wp-block-gallery aligncenter has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-rounded\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"525\" height=\"295\" src=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-1024x576.jpeg?resize=525%2C295&#038;ssl=1\" alt=\"\" class=\"wp-image-751\" srcset=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image.jpeg?resize=1024%2C576&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image.jpeg?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image.jpeg?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image.jpeg?resize=1536%2C864&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image.jpeg?w=1600&amp;ssl=1 1600w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-small-font-size\">Ciro Pistillo and Marco Giammarchi<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-rounded\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"525\" height=\"259\" src=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-2-1024x505.png?resize=525%2C259&#038;ssl=1\" alt=\"\" class=\"wp-image-752\" srcset=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-2.png?resize=1024%2C505&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-2.png?resize=300%2C148&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-2.png?resize=768%2C379&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-2.png?w=1256&amp;ssl=1 1256w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-small-font-size\">Elena Tonello, Stefano Aghion and Francesco Barantani (2016)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized is-style-default\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"525\" height=\"471\" src=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-6.png?resize=525%2C471&#038;ssl=1\" alt=\"\" class=\"wp-image-757\" style=\"width:672px;height:603px\" srcset=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-6.png?w=527&amp;ssl=1 527w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-6.png?resize=300%2C269&amp;ssl=1 300w\" sizes=\"auto, (max-width: 525px) 100vw, 525px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-small-font-size\">One of the gratings that are used in the QUPLAS experiment for positron interferometer<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"525\" height=\"379\" src=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-8-1024x739.png?resize=525%2C379&#038;ssl=1\" alt=\"\" class=\"wp-image-761\" srcset=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-8.png?resize=1024%2C739&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-8.png?resize=300%2C216&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-8.png?resize=768%2C554&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-8.png?resize=1536%2C1108&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-8.png?w=1600&amp;ssl=1 1600w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-small-font-size\">Micrograph of the emulsion containing the open regions of one of the gratings.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"525\" height=\"394\" src=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-10.png?resize=525%2C394&#038;ssl=1\" alt=\"\" class=\"wp-image-763\" srcset=\"https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-10.png?w=963&amp;ssl=1 963w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-10.png?resize=300%2C225&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.positron.fisi.polimi.it\/wp-content\/uploads\/2023\/07\/image-10.png?resize=768%2C576&amp;ssl=1 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p class=\"has-small-font-size\" style=\"line-height:1.5\"><em>Partial view of the positron interferometer: 1) Vacuum chamber containing the&nbsp;interferometer and the mu-metal shield. 2) Vacuum system. 3) x-y stage moving the absorbing&nbsp;target for beam size measurement. 4) Viewport for laser alignment. 5) BaF<sub>2<\/sub>&nbsp;detector. 6) Beam&nbsp;control electronics. 7) Bellows used for the alignment of the interferometer chamber.<\/em><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>A continuous positron beam is used to produce Talbot-Lau interference by means of micrometric gratings. The particle detection relies on the employment of emulsion based high-precision position detectors, which are being developed by the physicists of the Bern group in QUPLAS. Pictures of the first interferometer prototype and the micrometric gratings are presented in this page.<br>An intensive R&amp;D program has been conducted by the whole collaboration to assess the detectability of very low energy particles with emulsions and the capability to detect positrons at the keV energy scale has been successfully demonstrated.<br><\/p>\n\n\n\n<p>QUPLAS&nbsp;Spokesperson:&nbsp;<a href=\"http:\/\/pcgiammarchi.mi.infn.it\/giammarchi\/\" target=\"_blank\" rel=\"noreferrer noopener\">M.Giammarchi, INFN Milano<\/a><\/p>\n\n\n\n<p>More details available in these articles:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>S. Sala, F. Castelli, M. Giammarchi, S. Siccardi, S. Olivares.&nbsp;<a href=\"http:\/\/iopscience.iop.org\/article\/10.1088\/0953-4075\/48\/19\/195002\/meta\" target=\"_blank\" rel=\"noreferrer noopener\">Matter-wave interferometry: towards antimatter interferometers<\/a>.&nbsp;<em>J. Phys. B: At. Mol. Opt. Phys.<\/em>&nbsp;48, 195002 (2015) doi: 10.1088\/0953-4075\/48\/19\/195002&nbsp;<a href=\"https:\/\/arxiv.org\/pdf\/1505.01639.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>pdf<\/strong><\/a><\/li>\n\n\n\n<li>S. Sala, M. Giammarchi, S. Olivares.&nbsp;<a href=\"https:\/\/journals.aps.org\/pra\/abstract\/10.1103\/PhysRevA.94.033625\" target=\"_blank\" rel=\"noreferrer noopener\">Asymmetric Talbot-Lau interferometry for inertial sensing<\/a>.&nbsp;<em>Phys. Rev. A<\/em>&nbsp;94, 033625 (2016) doi:&nbsp;<a href=\"https:\/\/doi.org\/10.1103\/PhysRevA.94.033625\" target=\"_blank\" rel=\"noreferrer noopener\">10.1103\/PhysRevA.94.033625<\/a>&nbsp;<a href=\"https:\/\/arxiv.org\/pdf\/1601.06539.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>pdf<\/strong><\/a><\/li>\n\n\n\n<li>S. Aghion, A. Ariga, T. Ariga, M. Bollani, E. Dei Cas, A. Ereditato, C. Evans, R. Ferragut, M. Giammarchi, C. Pistillo,&nbsp;M. Rom\u00e9, S. Sala, and P. Scampoli.&nbsp;<a href=\"http:\/\/iopscience.iop.org\/article\/10.1088\/1748-0221\/11\/06\/P06017\" rel=\"noreferrer noopener\" target=\"_blank\">Detection of low energy antimatter with emulsions.<\/a>&nbsp;<em>JINST<\/em>&nbsp;<strong>11<\/strong>&nbsp;P06017 (2016) doi:&nbsp;<a href=\"http:\/\/iopscience.iop.org\/article\/10.1088\/1748-0221\/11\/06\/P06017\/pdf\" rel=\"noreferrer noopener\" target=\"_blank\">10.1088\/1748-0221\/11\/06\/P06017<\/a>&nbsp;<strong><a href=\"https:\/\/sites.google.com\/site\/papers20167\/Aghion_2016_J._Inst._11_P06017%5B8970%5D.pdf?attredirects=0&amp;d=1\" target=\"_blank\" rel=\"noreferrer noopener\">pdf<\/a><\/strong><\/li>\n\n\n\n<li>S. Aghion, A. Ariga, M. Bollani, A. Ereditato, R. Ferragut, M. Giammarchi, M. Lodari, C. Pistillo, S. Sala, P. Scampoli, and M. Vladymyrov.&nbsp;<a href=\"http:\/\/iopscience.iop.org\/article\/10.1088\/1748-0221\/13\/05\/P05013\/meta\" rel=\"noreferrer noopener\" target=\"_blank\">Nuclear emulsions for the detection of micrometric-scale fringe patterns: an application to positron interferometry<\/a>,&nbsp;<em>JINST<\/em>&nbsp;<strong>13<\/strong>, P05013 (2018) doi:&nbsp;<a href=\"https:\/\/doi.org\/10.1088\/1748-0221\/13\/05\/P05013\" rel=\"noreferrer noopener\" target=\"_blank\">10.1088\/1748-0221\/13\/05\/P05013<\/a>&nbsp;&nbsp;<strong><a href=\"https:\/\/sites.google.com\/site\/papers20167\/Aghion_et_al_JINST_2018_13_P05013.pdf?attredirects=0&amp;d=1\" target=\"_blank\" rel=\"noreferrer noopener\">pdf<\/a><\/strong><\/li>\n\n\n\n<li>S. Sala, A. Ariga, A. Ereditato, R. Ferragut, M. Giammarchi, M. Leone, C. Pistillo, P. Scampoli.&nbsp;<a href=\"https:\/\/advances.sciencemag.org\/content\/5\/5\/eaav7610\" target=\"_blank\" rel=\"noreferrer noopener\">First demonstration of antimatter wave interferometry<\/a>,&nbsp;<em>Science Adv.&nbsp;<\/em>(<strong>I.F.: 12.804<\/strong>)&nbsp;<strong>5<\/strong>eaav7610 (2019) doi:&nbsp;<a href=\"https:\/\/advances.sciencemag.org\/content\/5\/5\/eaav7610\" target=\"_blank\" rel=\"noreferrer noopener\">10.1126\/sciadv.aav7610<\/a>&nbsp;&nbsp;<a href=\"https:\/\/advances.sciencemag.org\/content\/5\/5\/eaav7610\/tab-pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>pdf<\/strong><\/a><\/li>\n\n\n\n<li>L. Anzi, A. Ariga, A. Ereditato, R. Ferragut, M. Giammarchi, G. Maero, C. Pistillo, M. Rom\u00e9, P. Scampoli, V. Toso.&nbsp;<a href=\"https:\/\/iopscience.iop.org\/article\/10.1088\/1748-0221\/15\/03\/P03027\/pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Sensitivity of emulsion detectors to low energy positrons<\/a>,&nbsp;<em>JINST<\/em>&nbsp;<strong>15<\/strong>, P03027 (2020) doi:&nbsp;<a href=\"https:\/\/iopscience.iop.org\/article\/10.1088\/1748-0221\/15\/03\/P03027\" target=\"_blank\" rel=\"noreferrer noopener\">10.1088\/1748-0221\/15\/03\/P03027<\/a>&nbsp;<a href=\"https:\/\/sites.google.com\/site\/papers201820\/Toso_et_al_2020_JINST.pdf?attredirects=0&amp;d=1\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>pdf<\/strong><\/a><\/li>\n\n\n\n<li>A.Ariga, S.Cialdi, G.Costantini, A.Ereditato, R.Ferragut, M.Giammarchi, M.Leone, G.Maero, L.Miramonti, C.Pistillo, M.Rom\u00e9, S.Sala, P.Scampoli, V.Toso,&nbsp;<a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0168900219313841?via%3Dihub\" target=\"_blank\" rel=\"noreferrer noopener\">The QUPLAS experimental apparatus for antimatter interferometry<\/a>,&nbsp;<em>Nucl. Instrum. Methods Phys. Res. A<\/em>&nbsp;<strong>951<\/strong>, 163019 (2020) doi:&nbsp;<a href=\"https:\/\/doi.org\/10.1016\/j.nima.2019.163019\" target=\"_blank\" rel=\"noreferrer noopener\">10.1016\/j.nima.2019.163019<\/a>&nbsp;<strong><a href=\"https:\/\/reader.elsevier.com\/reader\/sd\/pii\/S0168900219313841?token=C59604091BDBA4CDD4B6363D5247BDF3EA07CDE882D282EFB872A804ED8243DD21ADA949BCA2F69DF0E23737429B7615\" target=\"_blank\" rel=\"noreferrer noopener\">pdf<\/a><\/strong><\/li>\n<\/ol>\n\n\n\n<p>More information: some presentations<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"http:\/\/pcgiammarchi.mi.infn.it\/giammarchi\/Giammarchi_QUPLAS_Berna.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">M. Giammarchi et al. (QUPLAS)<\/a>&nbsp;Bern 2016<\/li>\n\n\n\n<li><a href=\"http:\/\/newcleo.unime.it\/Events\/ADMPP2016\/talks\/QUPLAS%20Messina%20AMDPP.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">S. Aghion et al. (QUPLAS)<\/a>&nbsp;Messina 2016<\/li>\n\n\n\n<li><a href=\"http:\/\/qinf.fisica.unimi.it\/~gonzo\/cposter\/56_simone.sala@mi.infn.it_web.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">S. Sala et al. (QUPLAS)<\/a>&nbsp;Milan 2017<\/li>\n\n\n\n<li><a href=\"https:\/\/sites.google.com\/site\/papers201820\/2018Progress.pdf?attredirects=0&amp;d=1\" target=\"_blank\" rel=\"noreferrer noopener\">M. Giammarchi, Progress on Antimatter Interferometry<\/a>&nbsp;(Workshop on Lorentz and CPT-violating Standard Model Extension &#8211; Indiana University) Indiana, June 2018<\/li>\n\n\n\n<li><a href=\"https:\/\/sites.google.com\/site\/papers201820\/Giammarchi_Vienna2018.pdf?attredirects=0&amp;d=1\" target=\"_blank\" rel=\"noreferrer noopener\">M. Giammarchi et al. (QUPLAS) First Observation of Antimatter wave interference<\/a>&nbsp;(Quantum SFB Vienna Meeting) Vienna 2018<\/li>\n\n\n\n<li><a href=\"https:\/\/sites.google.com\/site\/papers201820\/ICPA18_Ferragut.pdf?attredirects=0&amp;d=1\" target=\"_blank\" rel=\"noreferrer noopener\">R. Ferragut et al. (QUPLAS) Antimatter Interferometry<\/a>&nbsp;(International Conference on Positron Annihilation &#8211; ICPA-18), Orlando 2018<\/li>\n\n\n\n<li><a href=\"https:\/\/sites.google.com\/site\/papers201820\/talk_Simone_Sala.pdf?attredirects=0&amp;d=1\" target=\"_blank\" rel=\"noreferrer noopener\">S. Sala et al. (QUPLAS) QUPLAS: towards antimatter interferometry<\/a>&nbsp;(Frontiers Of Matter-wave Optics: FOMO 2018) Crete, 2018<\/li>\n<\/ul>\n\n\n\n<p>PhD Thesis: Simone Sala:&nbsp;<a href=\"https:\/\/air.unimi.it\/retrieve\/handle\/2434\/596728\/1088894\/phd_unimi_R11196.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">QUPLAS: TOWARDS ANTIMATTER INTERFEROMETRY<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>QUPLAS: QUantum interferometry and gravity withPositrons and LASers Collaboration Team M. Bayo, A. Calloni, A. Galanti, R. Ferragut, M. LeoneDipartimento di Fisica del Politecnico di Milano and INFN MilanoM. Giammarchi, G. Maero, M. Rom\u00e9, V. Toso, F. TriggianiDipartimento di Fisica dell\u2019Universit\u00e0 degli Studi and INFN Sezione di MilanoG. Rosi, L. Salvi, G.M. Tino, G. VinelliLENS, &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.positron.fisi.polimi.it\/\" class=\"more-link\">Leggi tutto<span class=\"screen-reader-text\"> &#8220;QUPLAS&#8221;<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-199","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.positron.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/pages\/199","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.positron.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.positron.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.positron.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.positron.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=199"}],"version-history":[{"count":58,"href":"https:\/\/www.positron.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/pages\/199\/revisions"}],"predecessor-version":[{"id":886,"href":"https:\/\/www.positron.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/pages\/199\/revisions\/886"}],"wp:attachment":[{"href":"https:\/\/www.positron.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}