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http://hdl.handle.net/2289/7432| Title: | Broadcasting of entanglement via orthogonal and non-orthogonal state-dependent cloners |
| Authors: | Shukla, Manish Kumar Chakrabarty, Indranil Chatterjee, Sourav |
| Keywords: | Cloning Broadcasting Entanglement Quantum Physics |
| Issue Date: | Jan-2020 |
| Publisher: | Springer Verlag |
| Citation: | Quantum Information Processing,2020, Vol.19, p18 |
| Abstract: | In this work, we extensively study the problem of broadcasting of entanglement as state-dependent versus state-independent cloners. We start by re-conceptualizing the idea of state-dependent quantum cloning machine (SD-QCM), and in that process, we introduce different types of SD-QCMs, namely orthogonal and non-orthogonal cloners. We derive the conditions for which the fidelity of these cloners will become independent of the input state. We note that such a construction allows us to maximize the cloning fidelity at the cost of having partial information of the input state. In the discussion on broadcasting of entanglement, we start with a general two-qubit state as our resource and later we consider a specific example of Bell diagonal state. We apply both state-dependent and state-independent cloners (orthogonal and non-orthogonal), locally and non-locally, on input resource state and obtain a range for broadcasting of entanglement in terms of the input state parameters. Our results highlight several instances where the state-dependent cloners outperform their state-independent counterparts in broadcasting entanglement. Our study provides a comparative perspective on the broadcasting of entanglement via cloning in two-qubit scenario, when we have some knowledge of the resource ensemble versus a situation when we have no such information. |
| Description: | Restricted Access. |
| URI: | http://hdl.handle.net/2289/7432 |
| ISSN: | 1570-0755 1 573-1332 (Online) |
| Alternative Location: | https://ui.adsabs.harvard.edu/abs/2020QuIP...19...15S/abstract https://arxiv.org/abs/1904.12899 https://doi.org/10.1007/s11128-019-2500-6 |
| Copyright: | 2020 Springer-Verlag |
| Appears in Collections: | Research Papers (LAMP) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2020_Quantum Information Processing_Vol.19_p15.pdf Restricted Access | Restricted Access | 1.5 MB | Adobe PDF | View/Open Request a copy |
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