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<\/strong><\/p>\n The power of quantum devices is limited by decoherence. The most accurate understanding of decoherence, requiring a full quantum-mechanical treatment of the system and (unknown) bath, is not only nontrivial in theory but also prohibitive in practice with increasing system size. Therefore, a noise model of decoherence that is both practical (i.e., classical) and predictive is desired, not only as a tool to characterize unknown (quantum) baths of interest (e.g., for quantum sensing or device characterization), but also to develop more robust quantum devices. While a classical noise model for a qubit under a fixed dynamics is known to be always possible, it is not guaranteed to be predictive for any different dynamics. To address this problem, we first propose a protocol to build a classical noise model of qubit decoherence that is self-consistent with a varied set of dynamics. If such a model is possible, it simultaneously characterizes the bath and is expected to be predictive under new dynamics; however, if it is not possible, it directly heralds a more complex, possibly quantum, bath that may be of interest for further investigation. Applying this protocol, we characterize the noise affecting our quantum device of interest, a nanoscale register of two electronic spins in diamond<\/p>\n <\/p>\n Funding Sources: No.PHY1415345 | No. EECS1702716<\/p>\n [\/et_pb_text][et_pb_image src=”https:\/\/cqe.mit.edu\/quarc2022\/wp-content\/uploads\/sites\/3\/2021\/12\/20211217_QuARC_abstractFigure.jpg” title_text=”20211217_QuARC_abstractFigure” align=”center” align_tablet=”center” align_phone=”center” align_last_edited=”on|desktop” _builder_version=”4.12.1″ max_width=”100%” module_alignment=”center” custom_margin=”||||false|false” animation_style=”slide” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ use_custom_gutter=”on” gutter_width=”1″ _builder_version=”4.12.1″ background_color=”#FFFFFF” width=”100%” max_width=”75%” module_alignment=”center” custom_padding=”5%|5%|5%|5%|true|false” use_custom_width=”on” width_unit=”off” custom_width_percent=”100%” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”3.25″ custom_padding=”15%|||” custom_padding_tablet=”0px|||” custom_padding_phone=”0px|||” custom_padding_last_edited=”on|tablet” global_colors_info=”{}” padding_tablet=”0px|||” padding_last_edited=”on|tablet” custom_padding__hover=”|||” padding_phone=”0px|||”][et_pb_text _builder_version=”4.12.1″ text_font=”||||||||” text_font_size=”16px” text_line_height=”2em” header_font=”Ubuntu|700|||||||” header_font_size=”60px” header_line_height=”1.4em” header_3_font=”Ubuntu||||||||” header_3_line_height=”1.8em” header_6_font=”Lato|700|||||||” header_6_font_size=”18px” header_6_line_height=”1.8em” background_color=”#96a6bd” background_layout=”dark” custom_padding=”10%|10%|10%|10%|true|true” custom_padding_phone=”80px|2vw||2vw||true” custom_padding_last_edited=”off|desktop” animation_style=”slide” animation_direction=”top” animation_intensity_slide=”2%” hover_enabled=”0″ text_font_size_tablet=”” text_font_size_phone=”14px” text_font_size_last_edited=”on|desktop” header_font_size_tablet=”” header_font_size_phone=”32px” header_font_size_last_edited=”on|desktop” global_colors_info=”{}” custom_css_main_element=”display:flex;” sticky_enabled=”0″]<\/p>\n <\/p>\n <\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”3.25″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_image src=”https:\/\/cqe.mit.edu\/quarc2022\/wp-content\/uploads\/sites\/3\/2021\/12\/CalvinSunRLE.jpeg” title_text=”CalvinSunRLE” align=”center” align_tablet=”center” align_phone=”center” align_last_edited=”on|desktop” _builder_version=”4.12.1″ max_width=”75%” module_alignment=”center” animation_style=”slide” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":" Self-consistent Noise Characterization of Quantum Devices Won Kyu Calvin Sun | Paola Cappellaro The power of quantum devices is limited by decoherence. The most accurate understanding of decoherence, requiring a full quantum-mechanical treatment of the system and (unknown) bath, is not only nontrivial in theory but also prohibitive in practice with increasing system size. Therefore, […]<\/p>\n","protected":false},"author":6,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-1359","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/cqe.mit.edu\/quarc2022\/wp-json\/wp\/v2\/pages\/1359","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cqe.mit.edu\/quarc2022\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cqe.mit.edu\/quarc2022\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cqe.mit.edu\/quarc2022\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/cqe.mit.edu\/quarc2022\/wp-json\/wp\/v2\/comments?post=1359"}],"version-history":[{"count":10,"href":"https:\/\/cqe.mit.edu\/quarc2022\/wp-json\/wp\/v2\/pages\/1359\/revisions"}],"predecessor-version":[{"id":1939,"href":"https:\/\/cqe.mit.edu\/quarc2022\/wp-json\/wp\/v2\/pages\/1359\/revisions\/1939"}],"wp:attachment":[{"href":"https:\/\/cqe.mit.edu\/quarc2022\/wp-json\/wp\/v2\/media?parent=1359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/strong><\/h4>\n
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Won Kyu Calvin Sun | Paola Cappellaro<\/strong><\/strong><\/h5>\n
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Won Kyu Calvin Sun<\/strong><\/h1>\n
Affiliation: MIT, Postdoc <\/strong><\/strong><\/h2>\n
Areas of Research<\/strong><\/h2>\n
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Open to<\/strong><\/h2>\n
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