Quantum entanglement has recently attracted much attention because its unique properties provide novel applications, such as quantum computing and imaging, beyond conventional techniques. To realize these advancements, one has to have a reliable entanglement-generation source, master its physical properties, and understand light-matter interaction. This book aims at addressing such issues. Untilizing momentum-momentum correlation of biphotons, quantum imaging was initiated with photons created from spontaneous parametric down- conversion (SPDC). In this book, an alternative biphoton source -...