Relaxation and Zeno effect in qubit measurements

Relaxation and Zeno effect in qubit measurements

We consider a qubit interacting with its environment and continuously monitored by a detector represented by a point contact. Bloch-type equations describing the entire system of the qubit, the environment and the detector are derived. Using these equations we evaluate the detector current and its n...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:arXiv.org 2003-07
Hauptverfasser: Gurvitz, S A, Fedichkin, L, Mozyrsky, D, Berman, G P
Format: Artikel
Sprache:eng
Schlagworte:
Environmental monitoring
Mathematical analysis
Point contact
Sensors
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page
container_issue
container_start_page
container_title arXiv.org
container_volume
creator Gurvitz, S A
Fedichkin, L
Mozyrsky, D
Berman, G P
description We consider a qubit interacting with its environment and continuously monitored by a detector represented by a point contact. Bloch-type equations describing the entire system of the qubit, the environment and the detector are derived. Using these equations we evaluate the detector current and its noise spectrum in terms of the decoherence and relaxation rates of the qubit. Simple expressions are obtained that show how these quantities can be accurately measured. We demonstrate that due to interaction with the environment, the measurement can never localize a qubit even for infinite decoherence rate.
doi_str_mv 10.48550/arxiv.0301409
format Article
fullrecord <record><control><sourceid>proquest</sourceid><recordid>TN_cdi_proquest_journals_2090799093</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2090799093</sourcerecordid><originalsourceid>FETCH-proquest_journals_20907990933</originalsourceid><addsrcrecordid>eNqNyr0OgjAUQOHGxESirM5NnMFLS4XORuNsnFxI0UtSAq30x_D4OvgATmf4DiHbAvKyFgL2ys36nQOHogS5IAnjvMjqkrEVSb3vAYAdKiYETwhccVCzCtoaqsyT3tFYil2Hj0C1oVNsdaAjKh8djmiC35BlpwaP6a9rsjufbsdL9nJ2iuhD09vozJcaBhIqKUFy_t_1AWiqONA</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2090799093</pqid></control><display><type>article</type><title>Relaxation and Zeno effect in qubit measurements</title><source>Free E- Journals</source><creator>Gurvitz, S A ; Fedichkin, L ; Mozyrsky, D ; Berman, G P</creator><creatorcontrib>Gurvitz, S A ; Fedichkin, L ; Mozyrsky, D ; Berman, G P</creatorcontrib><description>We consider a qubit interacting with its environment and continuously monitored by a detector represented by a point contact. Bloch-type equations describing the entire system of the qubit, the environment and the detector are derived. Using these equations we evaluate the detector current and its noise spectrum in terms of the decoherence and relaxation rates of the qubit. Simple expressions are obtained that show how these quantities can be accurately measured. We demonstrate that due to interaction with the environment, the measurement can never localize a qubit even for infinite decoherence rate.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.0301409</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Environmental monitoring ; Mathematical analysis ; Point contact ; Sensors</subject><ispartof>arXiv.org, 2003-07</ispartof><rights>2003. This work is published under https://arxiv.org/licenses/assumed-1991-2003/license.html (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>780,784,27924</link.rule.ids></links><search><creatorcontrib>Gurvitz, S A</creatorcontrib><creatorcontrib>Fedichkin, L</creatorcontrib><creatorcontrib>Mozyrsky, D</creatorcontrib><creatorcontrib>Berman, G P</creatorcontrib><title>Relaxation and Zeno effect in qubit measurements</title><title>arXiv.org</title><description>We consider a qubit interacting with its environment and continuously monitored by a detector represented by a point contact. Bloch-type equations describing the entire system of the qubit, the environment and the detector are derived. Using these equations we evaluate the detector current and its noise spectrum in terms of the decoherence and relaxation rates of the qubit. Simple expressions are obtained that show how these quantities can be accurately measured. We demonstrate that due to interaction with the environment, the measurement can never localize a qubit even for infinite decoherence rate.</description><subject>Environmental monitoring</subject><subject>Mathematical analysis</subject><subject>Point contact</subject><subject>Sensors</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqNyr0OgjAUQOHGxESirM5NnMFLS4XORuNsnFxI0UtSAq30x_D4OvgATmf4DiHbAvKyFgL2ys36nQOHogS5IAnjvMjqkrEVSb3vAYAdKiYETwhccVCzCtoaqsyT3tFYil2Hj0C1oVNsdaAjKh8djmiC35BlpwaP6a9rsjufbsdL9nJ2iuhD09vozJcaBhIqKUFy_t_1AWiqONA</recordid><startdate>20030701</startdate><enddate>20030701</enddate><creator>Gurvitz, S A</creator><creator>Fedichkin, L</creator><creator>Mozyrsky, D</creator><creator>Berman, G P</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20030701</creationdate><title>Relaxation and Zeno effect in qubit measurements</title><author>Gurvitz, S A ; Fedichkin, L ; Mozyrsky, D ; Berman, G P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_20907990933</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Environmental monitoring</topic><topic>Mathematical analysis</topic><topic>Point contact</topic><topic>Sensors</topic><toplevel>online_resources</toplevel><creatorcontrib>Gurvitz, S A</creatorcontrib><creatorcontrib>Fedichkin, L</creatorcontrib><creatorcontrib>Mozyrsky, D</creatorcontrib><creatorcontrib>Berman, G P</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science &amp; Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gurvitz, S A</au><au>Fedichkin, L</au><au>Mozyrsky, D</au><au>Berman, G P</au><format>book</format><genre>document</genre><ristype>GEN</ristype><atitle>Relaxation and Zeno effect in qubit measurements</atitle><jtitle>arXiv.org</jtitle><date>2003-07-01</date><risdate>2003</risdate><eissn>2331-8422</eissn><abstract>We consider a qubit interacting with its environment and continuously monitored by a detector represented by a point contact. Bloch-type equations describing the entire system of the qubit, the environment and the detector are derived. Using these equations we evaluate the detector current and its noise spectrum in terms of the decoherence and relaxation rates of the qubit. Simple expressions are obtained that show how these quantities can be accurately measured. We demonstrate that due to interaction with the environment, the measurement can never localize a qubit even for infinite decoherence rate.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.0301409</doi><oa>free_for_read</oa></addata></record>
fulltext fulltext
identifier EISSN: 2331-8422
ispartof arXiv.org, 2003-07
issn 2331-8422
language eng
recordid cdi_proquest_journals_2090799093
source Free E- Journals
subjects Environmental monitoring
Mathematical analysis
Point contact
Sensors
title Relaxation and Zeno effect in qubit measurements
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-12T07%3A00%3A18IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=document&rft.atitle=Relaxation%20and%20Zeno%20effect%20in%20qubit%20measurements&rft.jtitle=arXiv.org&rft.au=Gurvitz,%20S%20A&rft.date=2003-07-01&rft.eissn=2331-8422&rft_id=info:doi/10.48550/arxiv.0301409&rft_dat=%3Cproquest%3E2090799093%3C/proquest%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2090799093&rft_id=info:pmid/&rfr_iscdi=true