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...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2007
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