Eric Cornell: Is warm glass stickier than cold glass - Introduction Lecture from “Stone Cold Science: Bose-Einstein Condensation” at Thiagarajar College of Engineering, India
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- 23.09.2009
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Chapter 1 of 17: Introduction
Eric Cornell offers a concise overview of Heisenberg's uncertainty principle: 'If you know where something is, you can't know how fast it's moving...' He introduces the concept of zero-point energy. (3 minutes, 39 seconds)
Chapter 1 of 17: Introduction
Eric Cornell offers a concise overview of Heisenberg's uncertainty principle: 'If you know where something is, you can't know how fast it's moving...' He introduces the concept of zero-point energy. (3 minutes, 39 seconds)
Chapter 2 of 17: Quantum mechanics and guitar strings
Heisenberg's uncertainty principle not only applies to particles but also to the strings of a guitar. Here Eric Cornell describes the quantum oscillation of waves and electric fields. (3 minutes, 7 seconds)
Chapter 3 of 17: Why hasn't the universe imploded?
Using Einstein's famous equation, we can infer the "weight" inside every cubic meter. But what are some of the strange implications when we try and combine Heisenberg and Einstein's theories? (7 minutes, 58 seconds)
Chapter 4 of 17: The Casimir-Polder Force
Experiments to calculate the Casimir-Polder Force led the way towards explaining why the universe hasn't imploded - and the importance of accounting for evanescent waves. (7 minutes, 29 seconds)
Chapter 5 of 17: Measuring atom-surface forces
In order the measure the forces further, a large, slow-moving collection of cold atoms was preferable to single fast-moving atoms - Bose-Einstein Condensates fit the bill. (10 minutes, 15 seconds)
Chapter 6 of 17: Is warm glass stickier than cold glass?
In order to measure the effects of temperature, a laser was used to heat the glass surface from room temperature up to 600 Kelvin. (3 minutes, 26 seconds)
Chapter 7 of 17: Conclusion
Professor Cornell's experiments demonstrated that the force between an atom and a dielectric surface is (usually) attractive, and warm glass is indeed "stickier" than cold glass. (1 minute, 41 seconds)
Chapter 8 of 17: Q&A Part 1
Why did Professor Cornell choose to measure the atom-surface forces using Bose-Einstein Condensates? (1 minute, 52 seconds)
Chapter 9 of 17: Q&A Part 2
What are the basic quantum mechanical concepts of the Casimir-Polder force? (2 minutes, 2 seconds)
Chapter 10 of 17: Q&A Part 3
Professor Cornell discusses why temperature plays an important part in determining the measurement of the Casimir-Polder force. (3 minutes, 44 seconds)
Chapter 11 of 17: Q&A Part 4
What is the minimum distance required between the atom and the glass surface in order for the Casimir-Polder force to exist? (1 minute, 40 seconds)
Chapter 12 of 17: Q&A Part 5
Professor Cornell ponders the mystery of why there is a "cosmic" energy that is so close to - but not exactly - zero. Can we someday make use of dark energy? (3 minutes, 47 seconds)
Chapter 13 of 17: Q&A Part 6
What are the directions for future research into BEC? Professor Cornell describes new advances in quantum simulation which can help uncover the properties of exotic materials. (4 minutes, 10 seconds)
Chapter 14 of 17: Q&A Part 7
Have experiments on cold atoms been conducted in space? Professor Cornell gives reasons why he thinks "space is a hard place to do science". (2 minutes, 18 seconds)
Chapter 15 of 17: Q&A Part 8
What are the effects of changing the Casimir Polder force from attractive to repulsive using a dielectric field instead of a vacuum? Professor Cornell talks about the work of Harvard scientist Federico Capasso. (2 minutes, 6 seconds)
Chapter 16 of 17: Q&A Part 9
How can we accurately measure the ionization of the Rubidium atom? (3 minutes)
Chapter 17 of 17: Q&A Part 10
Why is it not possible to measure both the position and velocity of a particle simultaneously? Professor Cornell takes wave mechanics as a postulate from which he derives Heisenberg's Uncertaintly Principle. (3 minutes, 48 seconds)
Description
Eric Cornell takes us to the next level with an in-depth exploration of the implications of the Heisenberg Uncertainty Principle.
