Authors
Abstract
In this study, we consider a composed system consisting of two identical non-interacting subsystems. Each sub-system is made of a moving qubit into a leaky cavity. The study of the dynamic of the composed system revealed that compared with the stationary qubits, entanglement, quantum discord and coherence between two moving qubits remained close to their initial values as time went by. In particular, we show that the entanglement, quantum discord and the initial coherence between the two qubits could be strongly protected from decay by increasing the velocity of the qubits. Furthermore, based on such results, we have drawn a comparison between the three quantum resources (entanglement, quantum discord and coherence), demonstrating that the coherence of a bipartite system could be more robust than the two other quantum resources.
Keywords
2. A Streltsov, U Singh, H S Dhar, M N Bera, and G Adesso, Phys. Rev. Lett. 115 (2015) 020403.
3. X Hu, A Milne, B Zhang and H Fan, Scince Rep. 6 (2016) 19365.
4. C Radhakrishnan, M Parthasarathy, M Jambulingam and T Byrnes, Phys. Rev. Lett. 116 (2016) 150504.
5. C H Bennett, G Brassard, C Crepeau, R Josza, A Peres and W K Wootters, Phys. Rev. Lett. 70 (1993) 1895.
6. R Laflamme, C Miquel, J P Paz and W H Zurek, Phys. Rev. Lett. 77 (1996) 198.
7. M B Plenio, V Vedral and P L Knight, Phys. Rev. A 55 (1997) 67.
8. A Datta, A Shaji and C M Caves, Phys. Rev. Lett. 100 (2008) 050502.
9. B P Lanyon, M Barbieri, M P Almeida and A G White, Phys. Rev. Lett. 101 (2008) 200501.
10. H Ollivier and W H Zurek, Phys. Rev. Lett. 88 (2001) 017901.
11. L Henderson and V Vedral, J. Phys. A: Math. Gen. 34 (2001) 6899.
12. T Baumgratz, M Cramer and M B Plenio, Phys. Rev. Lett. 113 (2014) 140401.
13. I Vega and D Alonso, Rev. Mod. Phys. 89 (2017) 015001.
14. E M Laine, H P Breuer, J Piilo, C F Li and G C Guo, Phys. Rev. Lett. 108 (2012) 210402.
15. F Caruso, V Giovannetti, C Lupo and S Mancini, Rev. Mod. Phys. 86 (2014) 1203.
16. B Bellomo, R L Franco and G Compagno, Phys. Rev. Lett. 99 (2007) 160502.
17. L Viola and S Lloyd, Phys. Rev. A 58 (1998) 2733.
18. Z X Man, Y J Xia and N B An, Physics. Rev. A 86 (2012) 052322.
19. Z X Man, Y J Xia and R Lo Franco, Phys. Rev. A 92 (2015) 012315.
20. Z X Man, Y. J. Xiao and R Lo Franco, Sci. Rep. 5 (2015) 13843.
21. A D’Arrigo, R Lo Franco, G Benenti, E Paladino, and G Falci, Phys. Scr. T153 (2013) 014014.
22. L L Yan, J Q Zhang, J Jing, and M Feng, Phys. Lett. A 379 (2015) 2417.
23. J Yang, X H R Guo, P Xu, K Wang, C Sheng, M Liu, J Wang, A Derevianko, and M Zhan, Phys. Rev. Lett. 117 (2016) 123201.
24. I A Silva et al., Phys. Rev. Lett. 117 (2016) 160402.
25. A Mortezapour, G Naeimi, and R Lo Franco, Opt. Commun. 424 (2018) 26.
26. A Mortezapour and R Lo Franco, Sci. Rep. 8 (2018) 14304.
27. J-S Xu et al., Nature Commun. 4 (2013) 2851.
28. R Lang, M O Scully, W E Lamb, Phys. Rev. A 7 (1973) 1788.
29. A Mortezapour, M A Borji, D Park and R Lo Franco, Open Sys. Inf. Dyn. 24 (2017) 1740006
30. A Streltsov, G Adesso and M Plenio, Rev. Mod. Phys. 89 (2017) 041003.
31. W K Wootters Phys. Rev. Lett. 80 (1998) 2245.
32. M Ali, A R P Rau and G Alber, Phys. Rev. A 81 (2010) 042105.
33. C Z Wang, C X Li, L Y Nie and J F Li, J. Phys. B: At. Mol. Opt. Phys. 44 (2011) 015503.
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