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Managing the three-party entanglement challenge
- Source :
- Contemporary Physics. 62:189-198
- Publication Year :
- 2021
- Publisher :
- Informa UK Limited, 2021.
-
Abstract
- We introduce the challenges of multi-party quantum entanglement and explain a recent success in learning to take its measure. Given the widely accepted reputation of entanglement as a counter-intuitive feature of quantum theory, we first describe pure-state entanglement itself. We restrict attention to multi-party qubit states. Then we introduce the features that have made it challenging for several decades to extend an entanglement measure beyond the 2-qubit case of Bell states. We finish with a description of the current understanding that solves the 3-qubit entanglement challenge. This necessarily takes into account the fundamental division of the 3-qubit state space into two completely independent sectors identified with the so-called GHZ and $W$ states.<br />16 pages and 3 figures
Details
- ISSN :
- 13665812 and 00107514
- Volume :
- 62
- Database :
- OpenAIRE
- Journal :
- Contemporary Physics
- Accession number :
- edsair.doi.dedup.....761c680d379280da5b0918b0fcfa654c