Quantum waveguides are one of the key components in the development of quantum technologies as
they are crucial in the transmission of information. The progressive miniaturization of quantum chips
requires the waveguides to follow certain paths and so they need to be bent in order to be accommodate
onto the chip.
Often, waveguides are formed by two straight ends connected by a curved section. While the circular
shape is the simplest choice, it generates wave reflection and in turn data loss. It is hence vital to find a
protocol that helps designing the geometry of the curved section to ensure high transmission rates.
In this work [2] we implemented a procedure based on the “Shortcuts To Adiabaticity” approach as
outlined in [1]: starting with a semi-classical argument, we imposed constraints on the trajectory of the
particle, in order to inverse-engineer the geometry of the bent section with the aim of minimizing the
excitation of the outcoming particle.
The obtained geometry served as the starting point to define the potential of the quantum system. We
then simulated the time evolution of a wave function in said potential and compared it with a test wave
function, obtaining very high fidelity for a variety of initial velocities.
REFERENCES
[1] Fran\u00e7ois Impens, Romain Duboscq, and David Gu\u00e9ry-Odelin \u201cQuantum Control beyond the Adiabatic
Regime in 2D Curved Matter-Wave Guides\u201d Physical Review Letter. 124, 250403 (2020).
[2] Manuel Odelli, and Andreas Ruschhaupt, \u201cIn preparation\u201d (2021).<\/p>\n\n\n\n
Quantum waveguides are one of the key components in the development of quantum technologies as
\nthey are crucial in the transmission of information. The progressive miniaturization of quantum chips
\nrequires the waveguides to follow certain paths and so they need to be bent in order to be accommodate
\nonto the chip.
\nOften, waveguides are formed by two straight ends connected by a curved section. While the circular
\nshape is the simplest choice, it generates wave reflection and in turn data loss. It is hence vital to find a
\nprotocol that helps designing the geometry of the curved section to ensure high transmission rates.
\nIn this work [2] we implemented a procedure based on the “Shortcuts To Adiabaticity” approach as
\noutlined in [1]: starting with a semi-classical argument, we imposed constraints on the trajectory of the
\nparticle, in order to inverse-engineer the geometry of the bent section with the aim of minimizing the
\nexcitation of the outcoming particle.
\nThe obtained geometry served as the starting point to define the potential of the quantum system. We
\nthen simulated the time evolution of a wave function in said potential and compared it with a test wave
\nfunction, obtaining very high fidelity for a variety of initial velocities.
\nREFERENCES
\n[1] Fran\u00e7ois Impens, Romain Duboscq, and David Gu\u00e9ry-Odelin \u201cQuantum Control beyond the Adiabatic
\nRegime in 2D Curved Matter-Wave Guides\u201d Physical Review Letter. 124, 250403 (2020).
\n[2] Manuel Odelli, and Andreas Ruschhaupt, \u201cIn preparation\u201d (2021).<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-734","post","type-post","status-publish","format-standard","hentry","category-fomo2021-abstract"],"jetpack_featured_media_url":"","uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"ashe-slider-full-thumbnail":false,"ashe-full-thumbnail":false,"ashe-list-thumbnail":false,"ashe-grid-thumbnail":false,"ashe-single-navigation":false},"uagb_author_info":{"display_name":"Cretan Matterwaves","author_link":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/author\/bec\/"},"uagb_comment_info":0,"uagb_excerpt":"Quantum waveguides are one of the key components in the development of quantum technologies as they are crucial in the transmission of information. The progressive miniaturization of quantum chips requires the waveguides to follow certain paths and so they need to be bent in order to be accommodate onto the chip. Often, waveguides are formed…","jetpack_sharing_enabled":true,"publishpress_future_action":{"enabled":false,"date":"2026-07-29 18:46:28","action":"category","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/posts\/734","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/comments?post=734"}],"version-history":[{"count":1,"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/posts\/734\/revisions"}],"predecessor-version":[{"id":736,"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/posts\/734\/revisions\/736"}],"wp:attachment":[{"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/media?parent=734"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/categories?post=734"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.matterwaveoptics.eu\/FOMO2022\/wp-json\/wp\/v2\/tags?post=734"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}