Einstein’s General Theory of Relativity describes quantum information in classical gravitational fields and this book offers a concise discussion around this but also offers much more. Dr Lanzagorta looks at new results on steganographic quantum communications in inertial frames and qubits in Schwarzschild space-time and discusses examples of coupling a qubit’s spin and space-time curvature, and gravitation effects in the context of quantum communications, entanglement, EPR experiments, quantum computation and sensing.