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Volume 25 - ICOP & ICPET 2019                   ICOP & ICPET _ INPC _ ICOFS 2019, 25 - ICOP & ICPET 2019: 425-428 | Back to browse issues page

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Ghasemi M, Tavassoli M K. Using the optomechanical systems in the quantum repeater schemes. ICOP & ICPET _ INPC _ ICOFS 2019; 25 :425-428
URL: http://opsi.ir/article-1-1678-en.html
1- Atomic and Molecular Group, Faculty of Physics, Yazd University, Yazd
Abstract:   (1571 Views)
In this paper, we produce entanglement between two distant three-level atoms in order to prepare a quantum repeater. In this protocol, the distance between two target atoms is divided to four parts by inserting three quantum nodes (inserting six atoms) between them. The atoms have been labeled by (1, 2, … 8) and the pairs (1, 2), (3, 4), (5, 6) and (7, 8) have been prepared in entangled states. At first, by performing interaction between atoms (2, 3) and (6, 7) in the presence of optomechanical systems, entanglement is generated between atoms (1, 4) and (5, 8). Finally, we achieve the entangled states between atoms (1, 8) by performing interaction between atoms (4, 5) in an optical cavity. The entanglement is evaluated via entropy. The optomechanical coupling strength to the field mode has no effect on entropy of atoms (1, 8), but the time periods of entropy of atoms (1, 4) and (5, 8) are decreased by increasing this coupling strength. Increasing the frequency of optomechanical mode leads to an increase in the time periods of entanglement between atoms (1, 4), (5, 8) and (1, 8) in all stages of the process.
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Type of Study: Research | Subject: Special

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