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|Title:||Enhancing the detection of natural thermal entanglement with disorder|
|Source:||Hide, J., Son, W., Vedral, V. (2009-03-09). Enhancing the detection of natural thermal entanglement with disorder. Physical Review Letters 102 (10) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevLett.102.100503|
|Abstract:||Physical systems have some degree of disorder present in them. We discuss how to treat natural, thermal entanglement in any random macroscopic system from which a thermodynamic witness bounded by a constant can be found. We propose that functional many-body perturbation theory be applied to allow either a quenched or an annealed average over the disorder to be taken. We find, when considering the example of an XX Heisenberg spin chain with a random coupling strength, that the region of natural entanglement detected by both witnesses can be enhanced by the disorder. © 2009 The American Physical Society.|
|Source Title:||Physical Review Letters|
|Appears in Collections:||Staff Publications|
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