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http://hdl.handle.net/2289/8522| Title: | Intraparticle entanglement in noisy quantum channels: degradation and revival through amplitude damping |
| Authors: | Roy, Animesh Sinha Namitha, C. V. Mukerjee, Subroto Panigrahi, Prasanta K. Sinha, Urbasi |
| Keywords: | intraparticle entanglement interparticle entanglement entanglement decoherence revival of entanglement amplitude-damping channel phase damping channel depolarizing channel |
| Issue Date: | 18-Jun-2025 |
| Publisher: | frontiersin.org |
| Citation: | Frontiers in Quantum Science and Technology, 2025, Vol. 4, p1592872 |
| Abstract: | Quantum correlations between two or more different degrees of freedom of the same particle are sometimes referred to as intraparticle entanglement. In this work, we study these intraparticle correlations between two different degrees of freedom under various decoherence channels, viz. amplitude damping, depolarizing, and phase damping channels. We mainly focus on the amplitude-damping channel for which we obtain an exact analytical expression for the concurrence of an arbitrary initial pure state. In this channel, we observe the unique feature of entanglement arising from a separable initial state. We show that this channel allows for a revival of entanglement with an increasing damping parameter, including from a zero value of the concurrence. We also consider the amplitude-damping channel for interparticle entanglement and show that it does not display any of the above-mentioned interesting features. Further, for comparable parameters, the decay of entanglement in the interparticle system is much greater than in the intraparticle system, which we also find to be true for the phase damping and depolarizing channels. Thus, intraparticle entanglement subjected to damping is much more robust than interparticle entanglement. |
| Description: | Open Access |
| URI: | http://hdl.handle.net/2289/8522 |
| Alternative Location: | https://doi.org/10.3389/frqst.2025.1592872 |
| Copyright: | 2025 The Author(s) |
| Appears in Collections: | Research Papers (LAMP) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2025_FQST_Vol.4-p1.pdf | Open Access | 985.23 kB | Adobe PDF | View/Open |
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