I am just new to the concepts of entanglement entropy and how it is used to measure the entanglement in systems. I want to know the role of entanglement entropy in quantum information, in general.
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$\begingroup$ that's a bit too broad. The answer to "the role of entanglement entropy in general" could very well be the wikipedia page. Could you be more specific about what exactly you find unclear in the explanation there? $\endgroup$– glS ♦Dec 11, 2019 at 14:40
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Considering your question is not specific, you can take a look at Chapters 10 (classical entropy) and 11 (quantum entropy) of this book.
Quantum entanglement entropy as we know it comes from classical Shannon theory. Claude Shannon introduced entropy in order to quantify information. You can read his paper here.
