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Quantum Theory

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Quantum TheoryThis superb text by David Bohm, formerly Princeton University and Emeritus Professor of Theoretical Physics at Birkbeck College, University of London, provides a formulation of the quantum theory in terms of qualitative and imaginative concepts that have evolved outside and beyond classical theory. Although it presents the main ideas of quantum theory essentially in nonmathematical terms, it follows these with a broad range of specific applications

This superb text by David Bohm, formerly Princeton University and Emeritus Professor of Theoretical Physics at Birkbeck College, University of London, provides a formulation of the quantum theory in terms of qualitative and imaginative concepts that have evolved outside and beyond classical theory. Although it presents the main ideas of quantum theory essentially in nonmathematical terms, it follows these with a broad range of specific applications that are worked out in considerable mathematical detail.
Addressed primarily to advanced undergraduate students, the text begins with a study of the physical formulation of the quantum theory, from its origin and early development through an analysis of wave vs. particle properties of matter. In Part II, Professor Bohm addresses the mathematical formulation of the quantum theory, examining wave functions, operators, Schr dinger's equation, fluctuations, correlations, and eigenfunctions.
Part III takes up applications to simple systems and further extensions of quantum theory formulation, including matrix formulation and spin and angular momentum. Parts IV and V explore the methods of approximate solution of Schr dinger's equation and the theory of scattering. In Part VI, the process of measurement is examined along with the relationship between quantum and classical concepts.
Throughout the text, Professor Bohm places strong emphasis on showing how the quantum theory can be developed in a natural way, starting from the previously existing classical theory and going step by step through the experimental facts and theoretical lines of reasoning which led to replacement of the classical theory by the quantum theory.



Binding Type: Paperback
Publisher: Dover Publications
Published: 05/01/1989
ISBN: 9780486659695
Pages: 672
Weight: 1.44lbs
Size: 8.45h x 5.38w x 1.23d
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SKU: 20789806848

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Erika Ponte
Omaha, US
★★★★★ 5
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Style: 3.38 Fl Oz (Non SPF)
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Reviewed in the United States on May 27, 2026
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D. Hilbert
Lake Worth, US
★★★★★ 5
The best
Style: 3.38 Fl Oz (Non SPF)
I’ve been using the La Roche-Posay Toleriane Double Repair Face Moisturizer for a few weeks now, and it’s honestly one of the best daily moisturizers I’ve tried—especially for sensitive skin. First thing I noticed is how lightweight it feels. It absorbs quickly and doesn’t leave that greasy or heavy film that a lot of “hydrating” lotions do. My skin feels instantly softer, but not suffocated. It layers really well under makeup too—no pilling or weird texture. What really stands out is how balanced my skin has been since using it. I tend to get dry patches but also occasional breakouts, and this somehow helps with both. It hydrates without clogging pores, and I’ve noticed less redness overall. The fact that it contains ceramides and niacinamide is a huge plus if you’re trying to repair your skin barrier. It’s also fragrance-free, which I personally look for because anything scented tends to irritate my skin. The only small downside is the price point compared to drugstore moisturizers, but honestly, a little goes a long way and the quality makes it worth it. Overall, I’d definitely recommend this if you have sensitive, combination, or dry skin and want something simple but effective. It’s become a staple in my routine.
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Reviewed in the United States on April 20, 2026
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Krystina Mercer
Waukegan, US
★★★★★ 4
Moisturizing & repairs skin barrier, but does pill.
Style: 3.38 Fl Oz (Non SPF)
Given myself a couple weeks of consistent use before giving a review. There are a lot of pros to this product which include: moisturizing and stays moisturized all day, made my PIE marks (post acne marks) fade a lot faster. Repairs my skin barrier, especially while using tretinoin nightly, not too thick but thick enough to keep my face hydrated. It does not have a smell. The cons are: slight burn for about 15 seconds but disappears, it pills if I apply too much. It does pill less if I pat it on my face versus rubbing; it does not pill when I apply liquid foundation. I just have to let it dry for 15-20 mins before applying makeup. I found the pros to overpower the cons and will continue to use this product.
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Reviewed in the United States on May 15, 2026
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Gloria Wright
Chelsea, US
★★★★★ 5
Will buy again!
Style: 3.38 Fl Oz (Non SPF)
This is a very nice product. For the size it seems a bit expensive, but a little goes a long way and it may be a better value than I initially thought. My skin does look better, so it is doing it's job! I like the texture of it. It is fairly light, not oily, absorbs quickly into the skin, which I like. Highly recommend.
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Reviewed in the United States on April 21, 2026
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Lianis Castillo
Birmingham, US
★★★★★ 5
Amazing moisturizer, very hydrating! ⸻
Style: 3.38 Fl Oz (Non SPF), Style: 3.38 Fl Oz (Non SPF)
I absolutely love this moisturizer! It keeps my skin hydrated all day without feeling heavy or greasy. It’s very gentle and perfect for sensitive skin. My face feels soft, smooth, and healthy after using it. Definitely a must-have in my skincare routine. Highly recommend!
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Reviewed in the United States on May 22, 2026

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