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Theory of x-ray absorption by laser-dressed atoms
Theory of x-ray absorption by laser-dressed atoms

Electronic states in quantum dot atoms and molecules
Electronic states in quantum dot atoms and molecules

... is empty. When N becomes smaller than 20, the oscillation period depends strongly on N . In contrast, Coulomb oscillations observed for a large dot containing more than 100 electrons look very periodic (data not shown; see Ref. [6]), as expected from classical Coulomb blockade theory. The current pe ...
Cooling and Trapping Neutral Atoms—W. Ketterle, D.E. Pritchard
Cooling and Trapping Neutral Atoms—W. Ketterle, D.E. Pritchard

Entangling Photons via Four-Wave Mixing in a Rubidium Vapor Cell
Entangling Photons via Four-Wave Mixing in a Rubidium Vapor Cell

Quantum information with atoms and photons in a cavity:
Quantum information with atoms and photons in a cavity:

Many-body theory of excitation dynamics in an ultracold Rydberg gas
Many-body theory of excitation dynamics in an ultracold Rydberg gas

population inversion - Széchenyi István Egyetem
population inversion - Széchenyi István Egyetem

Atom optics: Old ideas, current technology, and new results
Atom optics: Old ideas, current technology, and new results

Demonstration of a neutral atom controlled
Demonstration of a neutral atom controlled

... by a factor of 1=0:852 to compensate for this loss. The reported data were obtained over a period of several months during which the two-atom loss factor varied by no more than 2%. We expect that future experiments with better vacuum, colder atoms, and shorter gap time will remove the need for this ...
Matter-Light Condensates Reach Thermal Equilibrium
Matter-Light Condensates Reach Thermal Equilibrium

... character of such condensates (for recent examples, see Ref. [1]). The new results by Sun and co-workers show that the same system can be tuned from a highly nonequilibrium state all the way to an equilibrium state by extending the lifetime of the polaritons. Reaching an equilibrium state relies on ...
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Paper

A compact laser head with high-frequency stability for Rb atomic
A compact laser head with high-frequency stability for Rb atomic

Photoassociation of ultracold LiRb molecules: Observation of high efficiency
Photoassociation of ultracold LiRb molecules: Observation of high efficiency

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Nature 419, (51

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Experimental Demonstration of Ground State Laser Cooling with

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Limit of Doppler cooling

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web 9-14

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Closed Transition ATS`s

... method of transferring a load between two sources with an interruption of power during transfer. ...
Chemistry 110
Chemistry 110

... Determine the reduced mass, , and moment of inertia, I, of the HCl molecule. Question 22| Assume that the HCl molecule is free to rotate in only 2 dimensions, i.e. it is restricted to the x,y plane. One way to think of this is that the HCl molecule is restricted to a crystal surface and can rotate ...
Laser Cooling of Atoms, Ions, or Molecules by Coherent Scattering
Laser Cooling of Atoms, Ions, or Molecules by Coherent Scattering

... The dissipative mechanism can be interpreted as Doppler cooling by cavity-induced frequency-dependent scattering. The resonator enhances scattering into modes with higher frequency than the incident light, which according to Eq. (2) produces asymmetric sidebands bh6 at frequencies vL 6 2v in the lig ...
Document
Document

... on certain metallic surfaces, photoelectrons are emitted. Einstein applied the idea of light quanta: In a photoemission process, a single photon gives up all its energy to a single electron. Energy of photon ...
Multiphoton population transfer between rovibrational states of HF: adiabatic
Multiphoton population transfer between rovibrational states of HF: adiabatic

Chapter 7 Solution Manual
Chapter 7 Solution Manual

Measuring the Rydberg Constant Using Circular Rydberg Atoms in
Measuring the Rydberg Constant Using Circular Rydberg Atoms in

Decay of oriented Rydberg wave packets excited with far-infrared radiation
Decay of oriented Rydberg wave packets excited with far-infrared radiation

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Population inversion

In science, specifically statistical mechanics, a population inversion occurs while a system (such as a group of atoms or molecules) exists in a state with more members in an excited state than in lower energy states. It is called an ""inversion"" because in many familiar and commonly encountered physical systems, this is not possible. The concept is of fundamental importance in laser science because the production of a population inversion is a necessary step in the workings of a standard laser.
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