1. Sachdev, S.: Quantum Phase Transitions. Cambridge University Press, Cambridge, UK (1999)
2. Nielsen, M.A., Chuang, I.L.: Quantum Computation and Quantum Information. Cambridge University Press, Cambridge, UK (2000)
3. Vedral, V.: Introduction to Quantum Information Science. Oxford University Press, Oxford, UK (2007)
4. Chen, C., An, J.-H., Luo, H.-G., Sun, C.P., Oh, C.H.: Phys. Rev. A 91, 052122 (2015)
5. Lindner, N.H., Refael, G., Galitski, V.: Nat. Phys. 7, 490 (2011)