Magnetic Field Effect on the Coherence Time of Asymmetric Gaussian Confinement Potential Quantum Well Qubits
Under a strong electron-LO-phonon coupling in asymmetric Gaussian confinement potential quantum wells (AGCPQWs) when exposed to external magnetic fields, the AGCPQW qubit coherent time can be obtained from Fermi's golden rule and the variational method of Pekar type. We have calculated the cohe...
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| Veröffentlicht in: | Journal of low temperature physics 2022, Vol.206 (3-4), p.191-198 |
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| creator | Feng, Li-Qin Qiu, Wei Ma, Xin-Jun Sun, Yong Xiao, Jing-Lin |
| description | Under a strong electron-LO-phonon coupling in asymmetric Gaussian confinement potential quantum wells (AGCPQWs) when exposed to external magnetic fields, the AGCPQW qubit coherent time can be obtained from Fermi's golden rule and the variational method of Pekar type. We have calculated the coherence times of two-level quantum systems in RbCl AGCPQWs in external magnetic fields with varying with cyclotron frequency of magnetic field, confinement potential range (CPR), AGCPQW height, oscillating frequency and polaron radius were theoretically calculated. Based on the numerical results, we found that the coherence time was increased by decreasing magnetic field cyclotron frequency, AGCPQW height, oscillating frequency and polaron radius. Also, the coherence time was decreased with CPR for
R
<
0.7
nm
and increased for
R
>
0.7
nm
, with minimum value at
R
=
0.7
nm
,
ω
c
=
10
×
10
13
Hz
and
τ
=
409.9
ps
. |
| doi_str_mv | 10.1007/s10909-021-02651-2 |
| format | Article |
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R
<
0.7
nm
and increased for
R
>
0.7
nm
, with minimum value at
R
=
0.7
nm
,
ω
c
=
10
×
10
13
Hz
and
τ
=
409.9
ps
.</description><identifier>ISSN: 0022-2291</identifier><identifier>EISSN: 1573-7357</identifier><identifier>DOI: 10.1007/s10909-021-02651-2</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Asymmetry ; Characterization and Evaluation of Materials ; Condensed Matter Physics ; Confinement ; Cyclotron frequency ; Cyclotrons ; Low temperature physics ; Magnetic fields ; Magnetic Materials ; Magnetism ; Mathematical analysis ; Physics ; Physics and Astronomy ; Polarons ; Quantum wells ; Qubits (quantum computing)</subject><ispartof>Journal of low temperature physics, 2022, Vol.206 (3-4), p.191-198</ispartof><rights>The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2021</rights><rights>The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2021.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-78d53b5ffa54a3ee09fb90b64189b17a1c7765a8e6d2e0c46d9ee3d90f7ccd663</citedby><cites>FETCH-LOGICAL-c319t-78d53b5ffa54a3ee09fb90b64189b17a1c7765a8e6d2e0c46d9ee3d90f7ccd663</cites><orcidid>0000-0002-1884-4709</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10909-021-02651-2$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10909-021-02651-2$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,777,781,27905,27906,41469,42538,51300</link.rule.ids></links><search><creatorcontrib>Feng, Li-Qin</creatorcontrib><creatorcontrib>Qiu, Wei</creatorcontrib><creatorcontrib>Ma, Xin-Jun</creatorcontrib><creatorcontrib>Sun, Yong</creatorcontrib><creatorcontrib>Xiao, Jing-Lin</creatorcontrib><title>Magnetic Field Effect on the Coherence Time of Asymmetric Gaussian Confinement Potential Quantum Well Qubits</title><title>Journal of low temperature physics</title><addtitle>J Low Temp Phys</addtitle><description>Under a strong electron-LO-phonon coupling in asymmetric Gaussian confinement potential quantum wells (AGCPQWs) when exposed to external magnetic fields, the AGCPQW qubit coherent time can be obtained from Fermi's golden rule and the variational method of Pekar type. We have calculated the coherence times of two-level quantum systems in RbCl AGCPQWs in external magnetic fields with varying with cyclotron frequency of magnetic field, confinement potential range (CPR), AGCPQW height, oscillating frequency and polaron radius were theoretically calculated. Based on the numerical results, we found that the coherence time was increased by decreasing magnetic field cyclotron frequency, AGCPQW height, oscillating frequency and polaron radius. Also, the coherence time was decreased with CPR for
R
<
0.7
nm
and increased for
R
>
0.7
nm
, with minimum value at
R
=
0.7
nm
,
ω
c
=
10
×
10
13
Hz
and
τ
=
409.9
ps
.</description><subject>Asymmetry</subject><subject>Characterization and Evaluation of Materials</subject><subject>Condensed Matter Physics</subject><subject>Confinement</subject><subject>Cyclotron frequency</subject><subject>Cyclotrons</subject><subject>Low temperature physics</subject><subject>Magnetic fields</subject><subject>Magnetic Materials</subject><subject>Magnetism</subject><subject>Mathematical analysis</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Polarons</subject><subject>Quantum wells</subject><subject>Qubits (quantum computing)</subject><issn>0022-2291</issn><issn>1573-7357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LAzEQhoMoWKt_wFPA82o-mmRzLKV-QEUFxWPIZid1ZTdbk-zBf2-0gjcPw8vA88zAi9A5JZeUEHWVKNFEV4TRMlLQih2gGRWKV4oLdYhmhDBWMabpMTpJ6Z0QomvJZ6i_t9sAuXP4uoO-xWvvwWU8BpzfAK_GN4gQHODnbgA8erxMn8MAORbhxk4pdTYUKvguwAAh48cxl-hsj58mG_I04Ffov5emy-kUHXnbJzj7zTl6uV4_r26rzcPN3Wq5qRynOleqbgVvhPdWLCwHINo3mjRyQWvdUGWpU0oKW4NsGRC3kK0G4K0mXjnXSsnn6GJ_dxfHjwlSNu_jFEN5aZhkUouFFnWh2J5ycUwpgje72A02fhpKzHerZt-qKa2an1YNKxLfS6nAYQvx7_Q_1hfinHtI</recordid><startdate>2022</startdate><enddate>2022</enddate><creator>Feng, Li-Qin</creator><creator>Qiu, Wei</creator><creator>Ma, Xin-Jun</creator><creator>Sun, Yong</creator><creator>Xiao, Jing-Lin</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-1884-4709</orcidid></search><sort><creationdate>2022</creationdate><title>Magnetic Field Effect on the Coherence Time of Asymmetric Gaussian Confinement Potential Quantum Well Qubits</title><author>Feng, Li-Qin ; Qiu, Wei ; Ma, Xin-Jun ; Sun, Yong ; Xiao, Jing-Lin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c319t-78d53b5ffa54a3ee09fb90b64189b17a1c7765a8e6d2e0c46d9ee3d90f7ccd663</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Asymmetry</topic><topic>Characterization and Evaluation of Materials</topic><topic>Condensed Matter Physics</topic><topic>Confinement</topic><topic>Cyclotron frequency</topic><topic>Cyclotrons</topic><topic>Low temperature physics</topic><topic>Magnetic fields</topic><topic>Magnetic Materials</topic><topic>Magnetism</topic><topic>Mathematical analysis</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Polarons</topic><topic>Quantum wells</topic><topic>Qubits (quantum computing)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Feng, Li-Qin</creatorcontrib><creatorcontrib>Qiu, Wei</creatorcontrib><creatorcontrib>Ma, Xin-Jun</creatorcontrib><creatorcontrib>Sun, Yong</creatorcontrib><creatorcontrib>Xiao, Jing-Lin</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of low temperature physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Feng, Li-Qin</au><au>Qiu, Wei</au><au>Ma, Xin-Jun</au><au>Sun, Yong</au><au>Xiao, Jing-Lin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Magnetic Field Effect on the Coherence Time of Asymmetric Gaussian Confinement Potential Quantum Well Qubits</atitle><jtitle>Journal of low temperature physics</jtitle><stitle>J Low Temp Phys</stitle><date>2022</date><risdate>2022</risdate><volume>206</volume><issue>3-4</issue><spage>191</spage><epage>198</epage><pages>191-198</pages><issn>0022-2291</issn><eissn>1573-7357</eissn><abstract>Under a strong electron-LO-phonon coupling in asymmetric Gaussian confinement potential quantum wells (AGCPQWs) when exposed to external magnetic fields, the AGCPQW qubit coherent time can be obtained from Fermi's golden rule and the variational method of Pekar type. We have calculated the coherence times of two-level quantum systems in RbCl AGCPQWs in external magnetic fields with varying with cyclotron frequency of magnetic field, confinement potential range (CPR), AGCPQW height, oscillating frequency and polaron radius were theoretically calculated. Based on the numerical results, we found that the coherence time was increased by decreasing magnetic field cyclotron frequency, AGCPQW height, oscillating frequency and polaron radius. Also, the coherence time was decreased with CPR for
R
<
0.7
nm
and increased for
R
>
0.7
nm
, with minimum value at
R
=
0.7
nm
,
ω
c
=
10
×
10
13
Hz
and
τ
=
409.9
ps
.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10909-021-02651-2</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-1884-4709</orcidid></addata></record> |
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| subjects | Asymmetry Characterization and Evaluation of Materials Condensed Matter Physics Confinement Cyclotron frequency Cyclotrons Low temperature physics Magnetic fields Magnetic Materials Magnetism Mathematical analysis Physics Physics and Astronomy Polarons Quantum wells Qubits (quantum computing) |
| title | Magnetic Field Effect on the Coherence Time of Asymmetric Gaussian Confinement Potential Quantum Well Qubits |
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