Manipulating atoms with photons (Nobel lecture of C. Cohen
... Dissipative effects and reactive effects also appear for the atoms, as a result of their interaction with photons. They correspond to a broadening and to a shift of the atomic energy levels, respectively. Such effects already appear when the atom interacts with the quantized radiation field in the v ...
... Dissipative effects and reactive effects also appear for the atoms, as a result of their interaction with photons. They correspond to a broadening and to a shift of the atomic energy levels, respectively. Such effects already appear when the atom interacts with the quantized radiation field in the v ...
Population inversion in optically pumped asymmetric quantum well
... internal quantum efficiency, given by the ratio t 32 / t rad . Calculated values of t rad ~for T577 K! are shown in Table I. These show a marked increase with decreasing emission energy. The quantum efficiency for a single active region is always going to be very poor ~approx. 1026 ), but is over an ...
... internal quantum efficiency, given by the ratio t 32 / t rad . Calculated values of t rad ~for T577 K! are shown in Table I. These show a marked increase with decreasing emission energy. The quantum efficiency for a single active region is always going to be very poor ~approx. 1026 ), but is over an ...
09. Quantum Mechanics Part I v4 - CREOL
... In the time before the planetary model of atoms, all that physicists had was the oscillating dipole. Remember this was before the electron was recognized as a particle and before the nucleus was considered to be made up of protons and neutrons (as late as 1930 we didn’t even know ...
... In the time before the planetary model of atoms, all that physicists had was the oscillating dipole. Remember this was before the electron was recognized as a particle and before the nucleus was considered to be made up of protons and neutrons (as late as 1930 we didn’t even know ...
New Bloch Period for Interacting Cold Atoms in 1D Optical Lattices
... due to the atom-atom interaction [22]. This difference becomes evident once the system evolved over several Bloch periods. In Fig. 3, the momentum distribution Pk at integer multiples of the Bloch period is shown. A periodic change of the distribution from SF to MI-like and back is clearly seen. ( ...
... due to the atom-atom interaction [22]. This difference becomes evident once the system evolved over several Bloch periods. In Fig. 3, the momentum distribution Pk at integer multiples of the Bloch period is shown. A periodic change of the distribution from SF to MI-like and back is clearly seen. ( ...
Evidence of Bose-Einstein Condensation in an Atomic
... the bias field prevents the loss of atoms due to nonadiabatic spin-flip transitions that can occur at the center of magnetic traps that do not have a bias field [15,16]. The trap oscillation frequencies of nz 117 6 6 Hz and nx,y 163 6 15 Hz were determined by a combination of spectroscopic obser ...
... the bias field prevents the loss of atoms due to nonadiabatic spin-flip transitions that can occur at the center of magnetic traps that do not have a bias field [15,16]. The trap oscillation frequencies of nz 117 6 6 Hz and nx,y 163 6 15 Hz were determined by a combination of spectroscopic obser ...
Chapter 6 Electronic Structure of Atoms
... energy levels of the electron. Electronic Structure of Atoms ...
... energy levels of the electron. Electronic Structure of Atoms ...
How laser works
... triggers the laser action. The green and blue wavelengths in the flash excite electrons in the chromium atoms to a higher energy level. Upon returning to their normal state, the electrons emit their characteristic ruby-red light. The mirrors reflect some of this light back and forth inside the ruby ...
... triggers the laser action. The green and blue wavelengths in the flash excite electrons in the chromium atoms to a higher energy level. Upon returning to their normal state, the electrons emit their characteristic ruby-red light. The mirrors reflect some of this light back and forth inside the ruby ...
Decoherence of matter waves by thermal emission of radiation
... the beams as determined by equation (1) below. It reproduces the detected number of ions in the heating stage for different laser powers, different numbers of heating beams and all velocities with the fit parameters for the triplet absorption cross-section, j(T1) ¼ 2 £ 10217 cm2, and the effective A ...
... the beams as determined by equation (1) below. It reproduces the detected number of ions in the heating stage for different laser powers, different numbers of heating beams and all velocities with the fit parameters for the triplet absorption cross-section, j(T1) ¼ 2 £ 10217 cm2, and the effective A ...
MEASUREMENT OF LIFETIMES OF EXCITED STATES OF THE
... not only in the state j but also in other excited states, as well as ions, another process also occurs-population of the state j: near the exit slit this results from excitation in collisions of ions and neutral atoms with molecules of the gas flowing through the slit (a very sharp pressure drop is ...
... not only in the state j but also in other excited states, as well as ions, another process also occurs-population of the state j: near the exit slit this results from excitation in collisions of ions and neutral atoms with molecules of the gas flowing through the slit (a very sharp pressure drop is ...