Entanglement preservation of three qubits in a common reservoir via addition of qubits

Authors

  • Christine Joy Vitug Reloza ⋅ PH National Institute of Physics, University of the Philippines Diliman
  • John Paul A. Besagas ⋅ PH National Institute of Physics, University of the Philippines Diliman
  • Eric A. Galapon ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

Under Markovian and non-Markovian regimes, we apply the method of adding qubits to preserve the entanglement of three qubits in an N-qubit system immersed in a common zero temperature Lorentzian reservoir composed of harmonic oscillators. From the reduced density matrix of the three qubits of interest, we determine whether the three qubits are entangled or not by using the separability criterion of Flores and Galapon [Ann. Phys. 392, 297 (2016)]. Moreover, we investigate the entanglement of three qubits as a function of time by the lower bound of concurrence (LBC). The first measure can only detect entanglement among three qubits at a certain time interval. Using the proposed scheme, the amount of entanglement, measured through concurrence, lost to the environment is lessened as the number of additional qubits is increased, hence, proving that such method is effective in protecting the entanglement.

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Issue

Article ID

SPP-2019-PB-06

Section

Poster Session PB

Published

2019-05-17

How to Cite

[1]
CJV Reloza, JPA Besagas, and EA Galapon, Entanglement preservation of three qubits in a common reservoir via addition of qubits, Proceedings of the Samahang Pisika ng Pilipinas 37, SPP-2019-PB-06 (2019). URL: https://proceedings.spp-online.org/article/view/SPP-2019-PB-06.