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This book introduces the quantum mechanical framework to information retrieval scientists seeking a new perspective on foundational problems. As such, it concentrates on the main notions of the quantum mechanical framework and describes an innovative range of concepts and tools for modeling information representation and retrieval processes.

The book is divided into four chapters. Chapter 1 illustrates the main modeling concepts for information retrieval (including Boolean logic, vector spaces, probabilistic models, and machine-learning based approaches), which will be examined further in subsequent chapters. Next, chapter 2 briefly explains the main concepts of the quantum mechanical framework, focusing on approaches linked to information retrieval such as interference, superposition and entanglement. Chapter 3 then reviews the research conducted at the intersection between information retrieval and the quantum mechanical framework. The chapter is subdivided into a number of topics, and each description ends with a section suggesting the most important reference resources. Lastly, chapter 4 offers suggestions for future research, briefly outlining the most essential and promising research directions to fully leverage the quantum mechanical framework for effective and efficient information retrieval systems.

This book is especially intended for researchers working in information retrieval, database systems and machine learning who want to acquire a clear picture of
the potential offered by the quantum mechanical framework in their own research
area. Above all, the book offers clear guidance on whether, why and when to
effectively use the mathematical formalism and the concepts of the quantum
mechanical framework to address various foundational issues in information retrieval.

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Elements of Information Retrieval.- Elements of Quantum Mechanics.- Quantum Mechanics and Information Retrieval.- Future Work.- Other Topics of Quantum Mechanics.- Index.

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Massimo Melucci is a professor of Computer Engineering at the University of Padova, Italy. He has been teaching and doing research in information retrieval since 1993. In particular, he investigates and experiments theoretical models especially from a geometrical, probabilistic, and statistical perspective. He is the author of a book on contextual search and co-edited a Springer book on "Advanced Topics in Information Retrieval".

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