A quantum dot single spin meter
We present the theory of a single spin meter consisting of a quantum dot in a magnetic field under microwave irradiation combined with a charge counter. We show that when a current is passed through the dot, a change in the average occupation number occurs if the microwaves are resonant with the on-...
| Main Authors: | , |
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| Format: | Journal article |
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IOP Publishing
2009
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| _version_ | 1797080658740248576 |
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| author | Wabnig, J Lovett, B |
| author_facet | Wabnig, J Lovett, B |
| author_sort | Wabnig, J |
| collection | OXFORD |
| description | We present the theory of a single spin meter consisting of a quantum dot in a magnetic field under microwave irradiation combined with a charge counter. We show that when a current is passed through the dot, a change in the average occupation number occurs if the microwaves are resonant with the on-dot Zeeman splitting. The width of the resonant change is given by the microwave-induced Rabi frequency, making the quantum dot a sensitive probe of the local magnetic field and enabling the detection of the state of a nearby spin. If the dot-spin and the nearby spin have different g-factors, a non-demolition readout of the spin state can be achieved. The conditions for a reliable spin readout are found. |
| first_indexed | 2024-03-07T01:03:15Z |
| format | Journal article |
| id | oxford-uuid:8a6e6a06-205b-4500-b963-f7769f121b86 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T01:03:15Z |
| publishDate | 2009 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:8a6e6a06-205b-4500-b963-f7769f121b862022-03-26T22:31:29ZA quantum dot single spin meterJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8a6e6a06-205b-4500-b963-f7769f121b86Symplectic Elements at OxfordIOP Publishing2009Wabnig, JLovett, BWe present the theory of a single spin meter consisting of a quantum dot in a magnetic field under microwave irradiation combined with a charge counter. We show that when a current is passed through the dot, a change in the average occupation number occurs if the microwaves are resonant with the on-dot Zeeman splitting. The width of the resonant change is given by the microwave-induced Rabi frequency, making the quantum dot a sensitive probe of the local magnetic field and enabling the detection of the state of a nearby spin. If the dot-spin and the nearby spin have different g-factors, a non-demolition readout of the spin state can be achieved. The conditions for a reliable spin readout are found. |
| spellingShingle | Wabnig, J Lovett, B A quantum dot single spin meter |
| title | A quantum dot single spin meter |
| title_full | A quantum dot single spin meter |
| title_fullStr | A quantum dot single spin meter |
| title_full_unstemmed | A quantum dot single spin meter |
| title_short | A quantum dot single spin meter |
| title_sort | quantum dot single spin meter |
| work_keys_str_mv | AT wabnigj aquantumdotsinglespinmeter AT lovettb aquantumdotsinglespinmeter AT wabnigj quantumdotsinglespinmeter AT lovettb quantumdotsinglespinmeter |