Hyperentanglement purification for two-photon six-qubit quantum systems
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2016-09-19 |
| Journal | Physical review. A/Physical review, A |
| Authors | Guan-Yu Wang, Qian Liu, FuāGuo Deng |
| Institutions | Beijing Normal University |
| Citations | 92 |
Abstract
Section titled āAbstractāRecently, two-photon six-qubit hyperentangled states were produced in\nexperiment and they can improve the channel capacity of quantum communication\nlargely. Here we present a scheme for the hyperentanglement purification of\nnonlocal two-photon systems in three degrees of freedom (DOFs), including the\npolarization, the first-longitudinal-momentum, and the second longitudinal\nmomentum DOFs. Our hyperentanglement purification protocol (hyper-EPP) is\nconstructed with two steps resorting to parity-check quantum nondemolition\nmeasurement on the three DOFs and SWAP gates, respectively. With these two\nsteps, the bit-flip errors in the three DOFs can be corrected efficiently.\nAlso, we show that using SWAP gates is a universal method for hyper-EPP in the\npolarization DOF and multiple longitudinal momentum DOFs. The implementation of\nour hyper-EPP is assisted by nitrogen-vacancy centers in optical microcavities,\nwhich could be achieved with current techniques. It is useful for long-distance\nhigh-capacity quantum communication with two-photon six-qubit\nhyperentanglement.\n
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2000 - Quantum Computation and Quantum Information