Quantum Mechanics Quotes

“The units that we use reflect our own size. The origin of the meter seems to be that it was used to measure rope or cloth: it’s about the distance from a person’s nose to his or her outstretched fingers. A second is about as long as a heartbeat. And a kilogram is a nice weight to carry around. We use these units because they are convenient, but fundamental physics doesn’t care that much about us. The”
― Leonard Susskind, Quantum Mechanics: The Theoretical Minimum

“Quantum mechanics can be appreciated, to some degree, on a purely qualitative level. But mathematics is what brings its beauty into sharp focus. We have tried to make this amazing body of work fully accessible to mathematically literate nonphysicists.”
― Leonard Susskind, Quantum Mechanics: The Theoretical Minimum

“world seems filled with people who are genuinely, deeply interested in physics but whose lives have taken them in different directions. This book is for all of us.”
― Leonard Susskind, Quantum Mechanics: The Theoretical Minimum

“For example, we’ll see that the idea of a state in quantum mechanics is conceptually very different from its classical counterpart. States are represented by different mathematical objects and have a different logical structure.”
― Leonard Susskind, Quantum Mechanics: The Theoretical Minimum

“Classical mechanics is filled to the brim with mathematical abstractions—point masses, rigid bodies, inertial reference frames, positions, momenta, fields, waves—the list goes on and on. There’s nothing new about mathematical abstractions.” This is actually a fair point, and indeed the classical and quantum worlds have some important things in common. Quantum mechanics, however, is different in two ways:”
― Leonard Susskind, Quantum Mechanics: The Theoretical Minimum

“the world seems filled with people who are genuinely, deeply interested in physics but whose lives have taken them in different directions. This book is for all of us.”
― Leonard Susskind, Quantum Mechanics: The Theoretical Minimum

“remarked that one of the best ways to learn physics is to write about it.”
― Leonard Susskind, Quantum Mechanics: The Theoretical Minimum

“Between successive measurements along the z axis, we turn through 90 degrees, make an intermediate measurement, and turn it back to its original direction. Will a subsequent measurement along the z axis confirm the original measurement? The answer is no. The”
― Leonard Susskind, Quantum Mechanics: The Theoretical Minimum