The battery of green laser pointer is disposable

1999, the United States Kimble group for the first time using intracavity optical dipole trap laser confinement of a single Cs atoms, they get atomic confinement life of τ = 28 ± 6ms [8]. Subsequently, the Germany Rempe team uses single-photon optical confinement of a single atom, single-atom imprisoned life of τ = 0.25 ± 0.05ms [9]. Rempe group recently adopted in perpendicular to the cavity axis direction to increase the standing wave dipole trap method to prevent the atoms in the cavity axis direction perpendicular to the axial the FORT constraint smaller and escape confinement time of an average of 17 s. Rempe group - 13 - East China University of Technology Thesis, single-atom laser imprisoned the use of the experimental setup shown in Figure 5 to achieve such a long confinement time. After the battery of  laser pointer    has been used out.
The detailed structure has been described above. When the atoms near the transmitted sent to the chamber, they are randomly distributed in the standing wave potential well, in fact, only a few atoms located in the cavity. Have sufficient kinetic energy of atoms in the trap between the movement into the cavity mode and the pumping laser at the intersection of the scattering of photons into the cavity is cooled. Figure 8 shows the sudden appearance of the location of an atom in the cavity in the experiment portrayed. At first, the photon scattering rate, because of the hot atom initially in the trap in position unstable and experience of the average Stark frequency shift? Ν is very small. With the cooling of atoms to stabilize the location of potential wells, the high scattering rate of disappearance. The customer should change a new piece of the battery of green laser pointer .
Atoms reach the final temperature, the scattering rate of (relative) decline, Since then, the potential well near the bottom, the atoms experience a greater Stark frequency & shift. Atomic kinetic energy E? T - time to E ≈ E /? Loss of the speed of t, starting from this simple estimation & calculation of an average friction coefficient, β = E / E ≈ 1/2? T, in the per 5/ms to 25/ms between. This is and expectations beta = 14/ms quite close to this by combining equations 1.6, 1.7 and F =? The beta mυ three type to get (m is the atomic mass). Figure 8: Single atoms captured photon Rabi frequency 2? = 2π × 50, the scattering rate is a function of time, open the timing from the standing wave. Possibility of damaging  laser pointer pen   might happen.
The curve represents 75ms after the atoms are captured by 100μs after the scattering rate is stable. In order to prevent more atoms into the cavity mode, they introduce a phase-out steps. Completed by the standing wave trap 10ms interrupt. During this time, the atoms in the cavity is still captured in the shallow po cavity dipole trap, but the other atoms to be eliminated. If you operate under the adiabatic condition, the trapping of atoms surviving probability higher than 50%. As shown in Figure 9, turn off the laser dipole trap the atoms in the average life expectancy for the 2.7s, but if the atom continues to be laser-cooled and coupled with the cavity meet? C, ≥ 0, the survival time of growth, its value is more than 20s. This is a deep strong cooling mechanism is active. In particular, when? C = 0, the measured life of atoms, of 17s. That being the case, there is no cavity cooling is not enough. The battery of  laser pointer pen   should be correctively mounted.