Geometry of Quantum States
An Introduction to Quantum Entanglement

This new edition describes the space of quantum states and the theory of quantum entanglement from a geometric perspective.

Ingemar Bengtsson (Author), Karol ?yczkowski (Author)

9781107026254, Cambridge University Press

Hardback, published 18 August 2017

632 pages, 139 b/w illus. 22 tables
25.4 x 18.2 x 3 cm, 1.39 kg

Praise for the first edition: 'Bengtsson's and Zyczkowski's book is an artful presentation of the geometry that lies behind quantum theory … the authors collect, and artfully explain, many important results scattered throughout the literature on mathematical physics. The careful explication of statistical distinguishability metrics (Fubini-Study and Bures) is the best I have read.' Gerard Milburn, University of Queensland

Quantum information theory is a branch of science at the frontier of physics, mathematics, and information science, and offers a variety of solutions that are impossible using classical theory. This book provides a detailed introduction to the key concepts used in processing quantum information and reveals that quantum mechanics is a generalisation of classical probability theory. The second edition contains new sections and entirely new chapters: the hot topic of multipartite entanglement; in-depth discussion of the discrete structures in finite dimensional Hilbert space, including unitary operator bases, mutually unbiased bases, symmetric informationally complete generalized measurements, discrete Wigner function, and unitary designs; the Gleason and Kochen–Specker theorems; the proof of the Lieb conjecture; the measure concentration phenomenon; and the Hastings' non-additivity theorem. This richly-illustrated book will be useful to a broad audience of graduates and researchers interested in quantum information theory. Exercises follow each chapter, with hints and answers supplied.

Preface
1. Convexity, colours, and statistics
2. Geometry of probability distributions
3. Much ado about spheres
4. Complex projective spaces
5. Outline of quantum mechanics
6. Coherent states and group actions
7. The stellar representation
8. The space of density matrices
9. Purification of mixed quantum states
10. Quantum operations
11. Duality: maps versus states
12. Discrete structures in Hilbert space
13. Density matrices and entropies
14. Distinguishability measures
15. Monotone metrics and measures
16. Quantum entanglement
17. Multipartite entanglement
Appendix 1. Basic notions of differential geometry
Appendix 2. Basic notions of group theory
Appendix 3. Geometry – do it yourself
Appendix 4. Hints and answers to the exercises
Bibliography
Index.

Subject Areas: Mathematical physics [PHU], Quantum physics [quantum mechanics & quantum field theory PHQ], Physics [PH], Topology [PBP], Geometry [PBM]