Getting through to a qubit by magnetic solitons
We propose a method for acting on the spin state of a spin- $\frac{1}{2}$ localized particle, or qubit , by means of a magnetic signal effectively generated by the nearby transit of a magnetic soliton, there conveyed through a transmission line. We first introduce the specific magnetic soliton of wh...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/8/083053 |
| _version_ | 1797751115029151744 |
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| author | Alessandro Cuccoli Davide Nuzzi Ruggero Vaia Paola Verrucchi |
| author_facet | Alessandro Cuccoli Davide Nuzzi Ruggero Vaia Paola Verrucchi |
| author_sort | Alessandro Cuccoli |
| collection | DOAJ |
| description | We propose a method for acting on the spin state of a spin- $\frac{1}{2}$ localized particle, or qubit , by means of a magnetic signal effectively generated by the nearby transit of a magnetic soliton, there conveyed through a transmission line. We first introduce the specific magnetic soliton of which we will make use, and briefly review the properties that make it apt to represent a signal. We then show that a Heisenberg spin chain can serve as transmission line, and propose a method for injecting a soliton into the chain by acting just on one of its ends. We finally demonstrate that the resulting magnetic pulse can indeed cause, just passing by the spin- $\frac{1}{2}$ localized particle embodying the qubit, a permanent change in its spin state, thus realizing the possibility of getting through to a single, localized qubit, and manipulating its state. A thorough analysis of how the overall dynamical system operates depending on the setting of its parameters demonstrates that fine tuning is not necessary as there exists an extended region in the parameters space that corresponds to effective functioning. Moreover, we show that possible noise on the transmission line does not invalidate the scheme. |
| first_indexed | 2024-03-12T16:42:44Z |
| format | Article |
| id | doaj.art-a4a5b08ee75c453488ca1026b71f574b |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:42:44Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-a4a5b08ee75c453488ca1026b71f574b2023-08-08T14:22:47ZengIOP PublishingNew Journal of Physics1367-26302015-01-0117808305310.1088/1367-2630/17/8/083053Getting through to a qubit by magnetic solitonsAlessandro Cuccoli0Davide Nuzzi1Ruggero Vaia2Paola Verrucchi3Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), ItalyDipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), ItalyIstituto Nazionale di Fisica Nucleare, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy; Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, via Madonna del Piano 10, I-50019 Sesto Fiorentino (FI), ItalyDipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy; Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, via Madonna del Piano 10, I-50019 Sesto Fiorentino (FI), ItalyWe propose a method for acting on the spin state of a spin- $\frac{1}{2}$ localized particle, or qubit , by means of a magnetic signal effectively generated by the nearby transit of a magnetic soliton, there conveyed through a transmission line. We first introduce the specific magnetic soliton of which we will make use, and briefly review the properties that make it apt to represent a signal. We then show that a Heisenberg spin chain can serve as transmission line, and propose a method for injecting a soliton into the chain by acting just on one of its ends. We finally demonstrate that the resulting magnetic pulse can indeed cause, just passing by the spin- $\frac{1}{2}$ localized particle embodying the qubit, a permanent change in its spin state, thus realizing the possibility of getting through to a single, localized qubit, and manipulating its state. A thorough analysis of how the overall dynamical system operates depending on the setting of its parameters demonstrates that fine tuning is not necessary as there exists an extended region in the parameters space that corresponds to effective functioning. Moreover, we show that possible noise on the transmission line does not invalidate the scheme.https://doi.org/10.1088/1367-2630/17/8/083053spin chainssolitonsqubits75.10.Pq05.45.Yv75.10.Hk |
| spellingShingle | Alessandro Cuccoli Davide Nuzzi Ruggero Vaia Paola Verrucchi Getting through to a qubit by magnetic solitons New Journal of Physics spin chains solitons qubits 75.10.Pq 05.45.Yv 75.10.Hk |
| title | Getting through to a qubit by magnetic solitons |
| title_full | Getting through to a qubit by magnetic solitons |
| title_fullStr | Getting through to a qubit by magnetic solitons |
| title_full_unstemmed | Getting through to a qubit by magnetic solitons |
| title_short | Getting through to a qubit by magnetic solitons |
| title_sort | getting through to a qubit by magnetic solitons |
| topic | spin chains solitons qubits 75.10.Pq 05.45.Yv 75.10.Hk |
| url | https://doi.org/10.1088/1367-2630/17/8/083053 |
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