{"id":1908,"date":"2025-04-03T09:58:41","date_gmt":"2025-04-03T07:58:41","guid":{"rendered":"https:\/\/ultrafastnano.eu\/?p=1908"},"modified":"2025-04-03T10:00:43","modified_gmt":"2025-04-03T08:00:43","slug":"3rd-review-period","status":"publish","type":"post","link":"https:\/\/ultrafastnano.eu\/index.php\/2025\/04\/03\/3rd-review-period\/","title":{"rendered":"Third Review Period"},"content":{"rendered":"\n<p>During the third reporting period (M36\u2013M60), we successfully achieved most of the initial goals set by UltraFastNano. Below, we highlight the main accomplishments of RP3.<\/p>\n\n\n\n<p><strong>WP1:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A phase stable voltage pulse generator based on a frequency comb has been realized that allows to generate very clean voltage pulses with a temporal width down to 20 picoseconds. This generator is presently used in WP3 to realize quantum interference experiments (<a href=\"https:\/\/journals.aps.org\/prapplied\/abstract\/10.1103\/PhysRevApplied.20.034005\">Aluffi et al., Phys. Rev. Applied 20, 034005 (2023)<\/a>).<\/li>\n\n\n\n<li>Single-shot detection of flying electrons using a single-triplet double quantum dot has been achieved (<a href=\"https:\/\/journals.aps.org\/prresearch\/abstract\/10.1103\/PhysRevResearch.4.043116\">Thiney et al., Phys. Rev. Research 4, 043116 (2022)<\/a>).<\/li>\n\n\n\n<li>Fabrication of lateral p-n junction has been completed and electroluminescence from the junction at low temperature has been demonstrated (publication: Semicond Sci. Technol. 38, 065001 (2023)).<\/li>\n\n\n\n<li>Detection of single charges in a high magnetic field: We have successfully verified the cryogenic detection of charge using a 4 Kelvin HEMT cryo-amplifier positioned just a few millimeters from the sample, achieving minimal heating of 200mK. The now ultra-small input capacitance of 0.5pF is expected to facilitate the detection of a single charge.<\/li>\n<\/ul>\n\n\n\n<p><strong>WP2:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ultrafast voltage pulses down to 2.3 picoseconds at cryogenic temperatures have been generated using opto-electronic conversion. Tunnel oscillations in a quantum device have been observed at a temperature as high as 4K. <\/li>\n\n\n\n<li>Electron injection from continuous hot-electron source into a p-n junction has been demonstrated. Electroluminescence from hot electrons has been observed. (<a href=\"https:\/\/arxiv.org\/abs\/2406.04556\">Norimoto et al.<\/a>)<\/li>\n\n\n\n<li>Light collection efficiency from a p-n junction has been improved above the dark count rate of single-photon detectors.<\/li>\n<\/ul>\n\n\n\n<p><strong>WP3:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Realization of the first quantum interference with ultrashort voltage pulses (<a href=\"https:\/\/arxiv.org\/abs\/2408.13025\">Ouacel et al.<\/a>)<em>.<\/em><\/li>\n\n\n\n<li>Demonstration of the practical feasibility of time braiding at filling factor 2\/5 using our novel two-particle dynamical interferometry, while at 2\/3, hole-conjugate FQHE phases present challenges for braiding (<a href=\"https:\/\/www.researchsquare.com\/article\/rs-5499114\/v1\">Glattli et al.<\/a>).<\/li>\n\n\n\n<li>Development of a new model for edge channel physics at \u03bd=2\/3 that revealed poor coherence lengths in our experiments, with both studies currently under review (<a href=\"https:\/\/arxiv.org\/abs\/2407.07208v2\">Glattli et al. 2<\/a>).<\/li>\n<\/ul>\n\n\n\n<p><strong>WP4:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Interaction effects on the emission and propagation of quasiparticles have been reported on (<a href=\"https:\/\/journals.aps.org\/prb\/abstract\/10.1103\/PhysRevB.109.115433\">Schulenborg et al. Phys. Rev. B 109, 115433 (2024)<\/a>).<\/li>\n\n\n\n<li>Dynamics of quasiparticles in interferometers has been reported on: (1) <a href=\"https:\/\/journals.aps.org\/prb\/abstract\/10.1103\/PhysRevB.110.075431\">Sp\u00e5nsl\u00e4tt et al., Phys. Rev. B 110, 075431 (2024))<\/a> ; (2) S. Varada, C. Sp\u00e5nsl\u00e4tt, M. Acciai, to be submitted (3) T. Kloss, X. Waintal, to be submitted.<\/li>\n<\/ul>\n\n\n\n<p><strong>WP5:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Progress meetings led on Sept 5-6th, 2024 (Teddington, UK) and March 30th, 2023 (La Thuile, Italy, during Moriond Conf\u00e9rence). The RP3 (and closure) project meeting was held virtually on February 25, 2025,<\/li>\n\n\n\n<li>In terms of communication activities during RP3: 2 articles for public audience, presentations at 13 international conferences, 29 workshops and seminars, 8 articles submitted, 32 articles published during the entire project duration, multiple actions for scientific vulgarisation (with especially 1 animated movie broadly shared on social media and public audience events),<\/li>\n\n\n\n<li>In terms of exploitation, several paths have been identified and pursued, either by commercial actions, services for fees, or patents filed.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>During the third reporting period (M36\u2013M60), we successfully achieved most of the initial goals set by UltraFastNano. Below, we highlight the main accomplishments of RP3. WP1: WP2: WP3: WP4: WP5:<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1908","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/posts\/1908","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/comments?post=1908"}],"version-history":[{"count":2,"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/posts\/1908\/revisions"}],"predecessor-version":[{"id":1910,"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/posts\/1908\/revisions\/1910"}],"wp:attachment":[{"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/media?parent=1908"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/categories?post=1908"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ultrafastnano.eu\/index.php\/wp-json\/wp\/v2\/tags?post=1908"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}