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| Content Provider | EDP Sciences |
|---|---|
| Author | Sumit Nandi Chandan Datta Arpan Das Pankaj Agrawal |
| Abstract | To explore the properties of a two-qubit mixed state, we consider quantum teleportation. The fidelity of a teleported state depends on the resource state purity and entanglement, as characterized by concurrence. Concurrence and purity are functions of state parameters. However, it turns out that a state with larger purity and concurrence, may have comparatively smaller fidelity. By computing teleportation fidelity, concurrence and purity for two-qubit X-states, we show it explicitly. We further show that fidelity changes monotonically with respect to functions of parameters – other than concurrence and purity. A state with smaller concurrence and purity, but larger value of one of these functions has larger fidelity. These functions, thus characterize nonlocal classical and/or quantum properties of the state that are not captured by purity and concurrence alone. In particular, concurrence is not enough to characterize the entanglement properties of a two-qubit mixed state. |
| Starting Page | 182 |
| File Format | HTM / HTML |
| ISSN | 14346060 |
| e-ISSN | 14346079 |
| Issue Number | 10 |
| Journal | The European Physical Journal D |
| Volume Number | 72 |
| DOI | 10.1140/epjd/e2018-90252-2 |
| Alternate Webpage(s) | https://articles/epjd/abs/2018/10/d180252/d180252.html |
| Language | English |
| Publisher | EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature |
| Publisher Date | 2018-10-01 |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | © EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2018 |
| Subject Keyword | Quantum Information |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics |
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