{"id":153,"date":"2023-08-16T13:38:31","date_gmt":"2023-08-16T17:38:31","guid":{"rendered":"https:\/\/research.ece.ncsu.edu\/farfurnik\/?page_id=153"},"modified":"2023-08-16T13:52:20","modified_gmt":"2023-08-16T17:52:20","slug":"characterization-of-spin-qubits","status":"publish","type":"page","link":"https:\/\/research.ece.ncsu.edu\/farfurnik\/research-2\/characterization-of-spin-qubits\/","title":{"rendered":"Characterization of Spin Qubits"},"content":{"rendered":"\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">We use lasers and microwave fields to study the optical and spin properties of optically-active spins in the solid-state. These measurements evaluate the performance of the studied systems for quantum information processing, networking, and sensing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><br>The characterized optical properties include the wavelength, lifetime, indistinguishability, and inhomogeneous linewidth of emitted single photons.<br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><br>The characterized spin properties include the pure dephasing, decoherence, and spin relaxation rates, as well as the noise sources that lead to these decay mechanisms. &nbsp;&nbsp;&nbsp;<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-content\/uploads\/sites\/34\/2023\/08\/Noise-1.png\" alt=\"\" class=\"wp-image-103\" style=\"width:490px;height:336px\" width=\"490\" height=\"336\" srcset=\"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-content\/uploads\/sites\/34\/2023\/08\/Noise-1.png 661w, https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-content\/uploads\/sites\/34\/2023\/08\/Noise-1-300x205.png 300w\" sizes=\"auto, (max-width: 490px) 100vw, 490px\" \/><figcaption class=\"wp-element-caption\"><em>In the figure: realization of all-optical pulse sequences of coherent control to characterize the noise sources that lead to the loss of coherence of quantum dots<\/em><\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Promising research directions:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Development of hybrid microwave and optical control for the optimal characterization of spin qubits.<\/li>\n\n\n\n<li>Experimental realization of compressed sensing for the resource-efficient characterization of noise sources with sparse features.<\/li>\n\n\n\n<li>Characterization of novel systems:\n<ul class=\"wp-block-list\">\n<li>1. Quantum dots and color centers that emit at telecom wavelengths, which are crucial for quantum communication and networking.<\/li>\n\n\n\n<li>2. Unstrained quantum dots with long spin coherence times for quantum information processing.<\/li>\n\n\n\n<li>3. \u201cMolecules\u201d of vertically stacked quantum dots, which feature long coherence times and are promising for quantum networking.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related publications:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li> K. Huang, <strong>D. Farfurnik<\/strong>, A. Seif, M. Hafezi, and Y-K. Liu. Random Pulse Sequences for Qubit Noise Spectroscopy. <a href=\"https:\/\/arxiv.org\/abs\/2303.00909\"><em>arXiv:2303.00909<\/em><\/a>.<\/li>\n\n\n\n<li><strong>D. Farfurnik<\/strong>, H. Singh, Z. Luo, A. S. Bracker, S. G. Carter, R. M. Pettit, and E. Waks.&nbsp; All-Optical Noise Spectroscopy of a Solid-State Spin.&nbsp; <a href=\"https:\/\/pubs.acs.org\/doi\/10.1021\/acs.nanolett.2c04552\"><em>Nano Lett. <\/em><strong>23<\/strong>, 1781-1786 (2023)<\/a>.&nbsp;<\/li>\n\n\n\n<li><strong>D. Farfurnik<\/strong> and N. Bar-Gill. Characterizing spin-bath parameters using conventional and time-asymmetric Hahn-echo sequences. <a rel=\"noreferrer noopener\" href=\"https:\/\/journals.aps.org\/prb\/abstract\/10.1103\/PhysRevB.101.104306\" target=\"_blank\"><em>Phys. Rev. B <\/em><strong>101<\/strong>, 104306 (2020)<\/a>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>We use lasers and microwave fields to study the optical and spin properties of optically-active spins in the solid-state. These measurements evaluate the performance of&#8230;<\/p>\n","protected":false},"author":123,"featured_media":0,"parent":157,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"page-fullwidth.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-153","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-json\/wp\/v2\/pages\/153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-json\/wp\/v2\/users\/123"}],"replies":[{"embeddable":true,"href":"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-json\/wp\/v2\/comments?post=153"}],"version-history":[{"count":2,"href":"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-json\/wp\/v2\/pages\/153\/revisions"}],"predecessor-version":[{"id":176,"href":"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-json\/wp\/v2\/pages\/153\/revisions\/176"}],"up":[{"embeddable":true,"href":"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-json\/wp\/v2\/pages\/157"}],"wp:attachment":[{"href":"https:\/\/research.ece.ncsu.edu\/farfurnik\/wp-json\/wp\/v2\/media?parent=153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}