Physical information Physical information Physical information is a form of information. In physics, it refers to the information of a physical system. Physical information is an important concept used in a number of fields of study in physics. For example, in quantum mechanics, the form of physical information known as quantum information is used in many descriptions of quantum phenomena, such as quantum observation, quantum entanglement and the causal relationship between quantum objects that carry out either or both close and long-range interactions with one another. In a somewhat general sense, the information of a given entity can be interpreted as its
The Theoretical Minimum The Theoretical Minimum The Theoretical Minimum: What You Need to Know to Start Doing Physics () is a popular science book by Leonard Susskind and George Hrabovsky. The book was initially published on January 29, 2013 by Basic Books. The book is a mathematical introduction to various theoretical physics concepts, such as principle of least action, Lagrangian mechanics, Hamiltonian mechanics, Poisson brackets, and electromagnetism. It is the first book in a series called "The Theoretical Minimum", based on Stanford Continuing Studies courses taught by world renowned physicist Leonard Susskind. The courses collectively teach everything required to gain a basic understanding