Witnessing macroscopic entanglement in a staggered magnetic field
We investigate macroscopic entanglement in an infinite XX spin- 1 2 chain with staggered magnetic field, Bl =B+ e-iπl b. Using single-site entropy and by constructing an entanglement witness, we search for the existence of entanglement when the system is at absolute zero, as well as in thermal equil...
| Những tác giả chính: | , , , |
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| Định dạng: | Journal article |
| Ngôn ngữ: | English |
| Được phát hành: |
2007
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| _version_ | 1826265268704247808 |
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| author | Hide, J Son, W Lawrie, I Vedral, V |
| author_facet | Hide, J Son, W Lawrie, I Vedral, V |
| author_sort | Hide, J |
| collection | OXFORD |
| description | We investigate macroscopic entanglement in an infinite XX spin- 1 2 chain with staggered magnetic field, Bl =B+ e-iπl b. Using single-site entropy and by constructing an entanglement witness, we search for the existence of entanglement when the system is at absolute zero, as well as in thermal equilibrium. Although the role of the alternating magnetic field b is, in general, to suppress entanglement as do B and T, we find that when T=0, introducing b allows the existence of entanglement even when the uniform magnetic field B is arbitrarily large. We find that the region and the amount of entanglement in the spin chain can be enhanced by a staggered magnetic field. © 2007 The American Physical Society. |
| first_indexed | 2024-03-06T20:21:01Z |
| format | Journal article |
| id | oxford-uuid:2dc82241-309e-467e-aebe-17d7b13c8ebf |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:21:01Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:2dc82241-309e-467e-aebe-17d7b13c8ebf2022-03-26T12:45:06ZWitnessing macroscopic entanglement in a staggered magnetic fieldJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2dc82241-309e-467e-aebe-17d7b13c8ebfEnglishSymplectic Elements at Oxford2007Hide, JSon, WLawrie, IVedral, VWe investigate macroscopic entanglement in an infinite XX spin- 1 2 chain with staggered magnetic field, Bl =B+ e-iπl b. Using single-site entropy and by constructing an entanglement witness, we search for the existence of entanglement when the system is at absolute zero, as well as in thermal equilibrium. Although the role of the alternating magnetic field b is, in general, to suppress entanglement as do B and T, we find that when T=0, introducing b allows the existence of entanglement even when the uniform magnetic field B is arbitrarily large. We find that the region and the amount of entanglement in the spin chain can be enhanced by a staggered magnetic field. © 2007 The American Physical Society. |
| spellingShingle | Hide, J Son, W Lawrie, I Vedral, V Witnessing macroscopic entanglement in a staggered magnetic field |
| title | Witnessing macroscopic entanglement in a staggered magnetic field |
| title_full | Witnessing macroscopic entanglement in a staggered magnetic field |
| title_fullStr | Witnessing macroscopic entanglement in a staggered magnetic field |
| title_full_unstemmed | Witnessing macroscopic entanglement in a staggered magnetic field |
| title_short | Witnessing macroscopic entanglement in a staggered magnetic field |
| title_sort | witnessing macroscopic entanglement in a staggered magnetic field |
| work_keys_str_mv | AT hidej witnessingmacroscopicentanglementinastaggeredmagneticfield AT sonw witnessingmacroscopicentanglementinastaggeredmagneticfield AT lawriei witnessingmacroscopicentanglementinastaggeredmagneticfield AT vedralv witnessingmacroscopicentanglementinastaggeredmagneticfield |