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00:31:00

The Adventure of Cold Atoms. From Optical Pumping to Quantum Gases

by Claude Cohen-Tannoudji
The Adventure of Cold Atoms. From Optical Pumping to Quantum Gases
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 813 views
Rating:

Conservation laws are very important in quantum physics. Two examples of applications will be given. First, optical pumping which uses transfer of angular momentum from polarized photons to atoms to produce highly polarized atomic gases. Then, laser ....

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00:29:00

A New Kilogram in 2018: The Biggest Revolution in Metrology Since the French Revolution

by Klaus vonKlitzing
A New Kilogram in 2018: The Biggest Revolution in Metrology Since the French Revolution
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 1005 views
Rating:

Metrology - the science of measurements - is responsible for the international uniformity and precision in standards. Today, the seven units for meter, kilogram, second, ampere, kelvin, mole, and candela of our international system of units (SI units....

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00:33:00

What About Redefining Time Using a Stable Laser?

by John Hall
What About Redefining Time Using a Stable Laser?
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 837 views
Rating:

Several laser-based Atomic Clocks now have an accuracy potential of ~2 x10-18, a hundred-fold better than the best achieved after more than 60 years' experience with rf resonances in Cs atoms. Still, this long attention span documents that the Cs Fou....

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00:44:00

The Future of Particle Physics

by David Gross
The Future of Particle Physics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 1064 views
Rating:

Elementary Particle Physics seeks to discover the basic constituents of matter and understand the fundamental forces that act on them. In this lecture I shall review the current state of particle physics, the grand success of the ñstandard modelî, ....

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00:37:00

Discovery of the Higgs Particle

by Martinus Veltman
Discovery of the Higgs Particle
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 915 views
Rating:

Recently the Higgs particle has been discovered at CERN. This particle was theoretically predicted. The historical development of field theory, leading to this prediction will be discussed.

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00:29:00

Future Accelerators for Astro-Particle Physics

by Carlo Rubbia
Future Accelerators for Astro-Particle Physics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 861 views
Rating:

One of the most remarkable results of astro-particle Physics has been the success of the Standard Model, recently culminated in the discovery of the Higgs particle (Ho). However, the Ho is observable only in few channels at the LHC, in the presence o....

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00:35:00

The International Year of Light: Celebrating Fifty Years of Laser Revolution in Physics

by Serge Haroche
The International Year of Light: Celebrating Fifty Years of Laser Revolution in Physics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 838 views
Rating:

The year 2015 has been named the International Year of Light, to mark milestones in the science of light which occurred 1000, 200, 150, 100 and 50 years go. I was a young student in physics in 1965, when the cosmic radiation background was discovered....

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00:39:00

Light Quanta and Their Idiosyncrasies

by Roy Glauber
Light Quanta and Their Idiosyncrasies
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 1027 views
Rating:

Maxwell's electromagnetic theory (now 150 years old) seemed in its comprehensive way to be capable of answering all of the questions one might ever pose about the theory of light. But that spell was broken in 1900 by Planck's discovery that light bea....

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00:31:00

Quantum Information: a Scientific and Technological Revolution for the 21st Century

by William Phillips
Quantum Information: a Scientific and Technological Revolution for the 21st Century
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 793 views
Rating:

Two of the great scientific and technical revolutions of the 20th century were the discovery of the quantum nature of the submicroscopic world, and the advent of information science and engineering. Both of these have had a profound effect not only o....

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00:35:00

Science with Combs of Light

by Theodor Hänsch
Science with Combs of Light
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 1025 views
Rating:

The spectrum of a frequency comb, commonly generated by a mode-locked femtosecond laser, consists of several hundred thousand precisely evenly spaced spectral lines. Such laser frequency combs have revolutionized the art of measuring the frequency of....

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00:33:00

The Origin of Elementary Particle Masses

by Francois Englert
The Origin of Elementary Particle Masses
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 766 views
Rating:

In the beginning of the 60s, the laws of classical general relativity, Einstein's generalisation of Newtonian gravity, and of quantum electrodynamics, the quantum version of Maxwell's electromagnetic theory, were known. These laws describe long range....

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00:28:00

Optical Microscopy – the Resolution Revolution

by Stefan Hell
Optical Microscopy – the Resolution Revolution
for 18-22 and upwards,
Lectures | 18-22 and upwards | 5 years ago | 782 views
Rating:

Throughout the 20th century it was widely accepted that a light microscope relying on conventional optical lenses cannot discern details that are much finer than about half the wavelength of light (200-400 nm), due to diffraction. However, in the 199....

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00:31:00

From Millisecond to Attosecond Laser Pulses

by Nicolaas Bloembergen
From Millisecond to Attosecond Laser Pulses
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1053 views
Rating:

A historical overview is presented of the experimental development of ever shorter laser pulses from 1960 to the present. Already in the early sixties nanosecond pulses were achieved and the entry into the picosecond domain was reached in the late s....

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00:25:00

Role of Cortical Noise in Vision

by Donald Glaser
Role of Cortical Noise in Vision
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 649 views
Rating:

Our brains are always generating electrical signals, even if we close our eyes, plug our ears, and lie in a warm bath. These signals are called cortical noise because they don't correlate with any sensation or thought of which we are aware. I will ....

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00:36:00

The Individuality of Light Quanta

by Roy Glauber
The Individuality of Light Quanta
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 952 views
Rating:

Light quanta are the fundamental units of radiant energy. When propagating freely they travel at the fastest attainable speed and live forever. These properties recommend them as the ideal messengers for communication of all sorts. Ordinary light ....

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00:27:00

Which Way For Physics?

by Brian Josephson
Which Way For Physics?
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 718 views
Rating:

This talk describes a new approach to the problem of characterising physical reality, one with the potential to fill in gaps in the conventional understanding of nature. It is based on a different view from the usual one of structure at the finest l....

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00:32:00

What Future for Energy and Climate?

by Jack Steinberger
What Future for Energy and Climate?
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 705 views
Rating:

We are using the planet's fossil fuel resources in a time which is very short compared to that of human evolution. In the same process we are changing the planet's climate and sea level, threatening the future of large segments of the global populat....

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00:30:00

The Development of Particle Physics

by Martinus Veltman
The Development of Particle Physics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 952 views
Rating:

Particle physics mainly developed after World War II. It has its roots in the first half of the previous century, when it became clear that all matter is made up from atoms, and the atoms in turn were found to contain a nucleus surrounded by electro....

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00:29:00

Discovery of Superconducting Tunneling

by Ivar Giaver
Discovery of Superconducting Tunneling
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1168 views
Rating:

I had the great fortune to receive a Nobel Prize in Physics for using electron tunneling to measure the energy gap in superconductors. In this talk I will recollect some of the events that led to this discovery and hopefully I will be able to convey....

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00:32:00

The Optical Frequency Comb – a Really Versatile Tool

by John Hall
The Optical Frequency Comb – a Really Versatile Tool
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 927 views
Rating:

The Optical Frequency Comb concept and technology exploded in 1999-2000 from the synthesis of advances in independent fields of Laser Stabilization, UltraFast Lasers, and NonLinear Optical Fibers. The Comb was developed first as a method for optical....

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00:29:00

Towards a Quantum Laboratory on a Chip

by Theodor Hänsch
Towards a Quantum Laboratory on a Chip
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 702 views
Rating:

Microfabricated magnetic traps, waveguides, and other elements for the manipulation of ultracold atoms can be combined to form a quantum laboratory on a chip. Devices such as miniaturized atom lasers, atom interferometers, and atomic clocks have been....

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00:33:00

Cold Atomic Gases: the Intersection of Condensed Matter and Atomic Physics

by William Phillips
Cold Atomic Gases: the Intersection of Condensed Matter and Atomic Physics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1053 views
Rating:

During the past decade laser cooling and evaporative cooling of atoms have produced quantum degenerate gases both of bosons (Bose-Einstein condensates) and of fermions (gases with temperatures below the Fermi temperature). Such gases can provide ana....

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00:34:00

From Spinwaves to Giant Magnetoresistance (GMR) and Beyond

by Peter GrŸnberg
From Spinwaves to Giant Magnetoresistance (GMR) and Beyond
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 886 views
Rating:

Standing spinwaves and surface waves in layered magnetic structures can be used for the detection and quantitative evaluation of interlayer exchange coupling (IEC). Using this method antiferromagnetic IEC has been found in Fe/Cr/Fe layered structure....

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00:37:00

Cosmic Rays: the Most Energetic Particles in the Universe

by James Cronin
Cosmic Rays: the Most Energetic Particles in the Universe
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 807 views
Rating:

Astrophysical objects are able to accelerate atomic nuclei to energies 10^7 times more than man made accelerators such as LHC. _Particles arrive at earth from space with energies as great as 50 joules, a macroscopic energy in a microscopic particle.....

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00:39:00

The World of Spintronics: Electrons, Spins, Computers and Telephones

by Albert Fert
The World of Spintronics: Electrons, Spins, Computers and Telephones
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 744 views
Rating:

Spintronics is a new field of research which exploits the influence of the electron spin on electronic transport. It is well known for the giant magnetoresistance of the magnetic multilayers and its application to increase the capacity of the hard d....

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00:32:00

The Big Challenges

by Gerardus t'Hooft
The Big Challenges
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 764 views
Rating:

During the entire 20th century, physical sciences have advanced to such a degree that we can extrapolate how they can be applied, even in a fairly distant future.  Even if we leave open the (likely) possibility of spectacular new discoveries and inv....

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00:34:00

Frontiers of Physics

by David Gross
Frontiers of Physics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1133 views
Rating:

David discusses a few of the questions facing fundamental physics that might be answered before the 100th Lindau meeting in 2050.

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00:32:00

The Looming World Shortage of Helium

by Robert Richardson
The Looming World Shortage of Helium
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 648 views
Rating:

The worldÍs supply of Helium gas comes primarily from alpha decay in rocks. The most abundant supply is in the American Southwest where it is trapped with methane is natural gas wells. That supply is estimated to last a mere 25 years. It took 4.7 bi....

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00:28:00

The History of the Universe, from the Beginning to the Ultimate End

by John Mather
The History of the Universe, from the Beginning to the Ultimate End
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 768 views
Rating:

John summarizes the history of the universe, from the Big Bang through the formation of galaxies and the Solar System, and the history of the Earth and some of the special factors enabling the formation of life.  Our future will be hot as the Sun ge....

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01:18:00

What is Quantum Optics?

by Roy Glauber
What is Quantum Optics?
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 2925 views
Rating:

The image of light waves as oscillating electromagnetic fields explains virtually all the phenomena of traditional optics.  An awareness that these waves are somehow subdivided into quanta has however been with us since the early 20th century.  The....

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00:43:00

The Development of Particle Physics

by Martinus Veltman
The Development of Particle Physics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 823 views
Rating:

Particle physics mainly developed after World War II. It has its roots in the first half of the previous century, when it became clear that all matter is made up from atoms, and the atoms in turn were found to contain a nucleus surrounded by electro....

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01:04:00

Mapping the Universe and Its History

by George Smoot
Mapping the Universe and Its History
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1500 views
Rating:

Using our most advanced techniques and instruments we sift through study the cosmic microwave background as a relic of the early universe to understand the events surrounding the birth and subsequent development of the Universe.  A precision inspect....

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00:34:00

What Can We Do with Laser Frequency Combs?

by Theodor Hänsch
What Can We Do with Laser Frequency Combs?
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 987 views
Rating:

The spectrum of a frequency comb, commonly generated by a mode-locked femtosecond laser consists of several hundred thousand precisely evenly spaced spectral lines.  Such laser frequency combs have revolutionized the art measuring the frequency of l....

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00:27:00

Model Synthesis for Ceramics: Superconductors, Magnets and Others

by Karl Muller
Model Synthesis for Ceramics: Superconductors, Magnets and Others
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 923 views
Rating:

The discovery of superconductivity in hole doped La2CuO4 was motivated by the interest to find this phenomenon in an oxide.  After the discovery near 35 K, copper oxides with transition temperatures of up to 131 K at normal pressure were found, i.e.....

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00:30:00

Superposition, Entanglement, and Raising Schrödinger’s Cat

by David Wineland
Superposition, Entanglement, and Raising Schrödinger’s Cat
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1455 views
Rating:

In 1935, Erwin Schrödinger, one of the inventors of quantum mechanics, illustrated his discomfort with the theory by pointing out that its extension to the macroscopic world could lead to bizarre situations such as a cat being simultaneously alive a....

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00:31:00

Controlling Photons in a Box and Exploring the Quantum to Classical Boundary

by Serge Haroche
Controlling Photons in a Box and Exploring the Quantum to Classical Boundary
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1266 views
Rating:

The founders of quantum theory assumed in 'thought experiments' that they were manipulating isolated quantum systems, obeying the counterintuitive laws which they had just discovered.  Technological advances have recently turned these virtual experi....

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00:30:00

Powering the Future

by Robert Laughlin
Powering the Future
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 970 views
Rating:

Some seeds of what to do in the climate/energy controversy are contained in what will be.  In this talk I shall ask everyone to jump over contemporary politics and make a mental journey to a time, several centuries from now, when nobody uses carbon-....

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00:33:00

Spontaneous Ionization to Subatomic Physics: Some Vignettes from Cosmic Ray History

by James Cronin
Spontaneous Ionization to Subatomic Physics: Some Vignettes from Cosmic Ray History
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 745 views
Rating:

In 1879 Crookes discovered that air seemed to ionize spontaneously.  With the discovery in 1896 of radioactivity by Henri Becquerel it appeared that the mystery was solved.  However a number of physicists sought a quantitative agreement between the....

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00:34:00

The Quantum Mechanics of Light: Interference, Entanglement – and Ghosts

by Roy Glauber
The Quantum Mechanics of Light: Interference, Entanglement – and Ghosts
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1040 views
Rating:

The early days of the quantum theory presented many dilemmas connected with interference phenomena and what we have come to call the entanglement of states. We are much better able to deal with these problems now, both in theory and experiment, but t....

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00:31:00

Five Decades of Lasers, Six Decades of Progress, and a Proposed Space Experiment to test Einstein’s Assumptions

by John Hall
Five Decades of Lasers, Six Decades of Progress, and a Proposed Space Experiment to test Einstein’s Assumptions
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 854 views
Rating:

Even though this is the 51st year of the Laser, progress in its control and application in precision measurements is still accelerating.  The Optical Frequency Comb technology exploded in 1999-2000 from the synthesis of advances in independent field....

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00:31:00

Laser Spectroscopy of Hydrogen

by Theodor Hänsch
Laser Spectroscopy of Hydrogen
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1040 views
Rating:

The simple Balmer spectrum of atomic hydrogen has provided the Rosetta stone for deciphering the strange laws of quantum physics during the early 20th century.  Four decades ago, Doppler-free laser spectroscopy opened a new chapter in the exploratio....

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00:33:00

A Century of Quantum Mechanics

by David Gross
A Century of Quantum Mechanics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1471 views
Rating:

In October 2011 we celebrated the centenary of the Solvay conferences that played a unique and important role in the development of twentieth century physics, most notably in the quantum revolution whose birth overlapped the initiation of these meeti....

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00:30:00

The Real M-Theory

by Brian Josephson
The Real M-Theory
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 813 views
Rating:

How can one advance a working hypothesis that will not be wrong tomorrow and ridiculous the day after? Beyond the Standard Model we find uncertainty and confusion, with both unclarity as to which might be the correct theory, as well as little in the ....

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00:31:00

Creating Artificial Magnetic Fields to Act on Neutral Atoms

by William Phillips
Creating Artificial Magnetic Fields to Act on Neutral Atoms
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 1081 views
Rating:

Cold, quantum degenerate gases of neutral atoms have proved to be useful in simulating the behavior of quantum systems like electrons in solids.  For example, cold atoms moving in optical lattices (periodic potentials created by interfering laser be....

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00:31:00

Neutrinos: a Golden Field for Astroparticle Physics

by Carlo Rubbia
Neutrinos: a Golden Field for Astroparticle Physics
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 804 views
Rating:

Neutrinos have been the origin of an impressive number of ‘surprises’.  We know that neutrinos have tiny masses and that oscillations are occurring spontaneously between neutrino species.  But additional new discoveries may be ahead of us and t....

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00:34:00

The LHC at CERN and the Higgs

by Martinus Veltman
The LHC at CERN and the Higgs
for 18-22 and upwards,
Lectures | 18-22 and upwards | 6 years ago | 958 views
Rating:

The strong interactions, the forces responsible for the interactions between quarks and notably supposedly responsible for quark confinement, profited from the development of gauge theories.  In the wake of the gauge theory of weak interactions also....

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