Abstract
Using a system of three distant cavities, we propose a method for constructing tripartite entangled coherent GHZ and W states which are robust due to the photon losses in the cavities. Each of cavities is doped with a semiconductor quantum dot. By the dynamics, the excitonic modes of quantum dots are enabled to exhibit entangled coherent GHZ and W states. Apart from the exciton losses, the master equation approach shows that when the populations of the field modes in the cavities are negligible the destruction of entanglement due to dissipation arises from photon losses, is effectively suppressed.
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Appendix
Appendix
The solutions of (2) for \(\hat {a}_{2}(t)\), \(\hat {a}_{3}(t)\) and \(\hat {b}_{1}(t)\), \(\hat {b}_{2}(t)\) and \(\hat {b}_{3}(t)\) are given as follow:
where u 1j (t) and v 1j (t) for j = 1,2 are denoted as
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Behzadi, N., Ahansaz, B. & Kazemi, S. Constructing Robust Entangled Coherent GHZ and W States via a Cavity QED System. Int J Theor Phys 55, 1577–1592 (2016). https://doi.org/10.1007/s10773-015-2796-7
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DOI: https://doi.org/10.1007/s10773-015-2796-7