caesium atoms decelerated

Caesium Atoms Decelerated

Caesium - Wikipedia

Caesium (IUPAC spelling) (also spelled cesium in American English) is a stone element with the symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of 28.5 °C (83.3 °F), which makes it one of only five elemental metals that are liquid at or near room temperature.

Atomic clocks: how they work and what they are used for

The newer atomic clocks function on the basis of thermally decelerated atoms in the so-called caesium fountain, in which caesium atoms are cooled down to such an extent that they are only about one centimetre fast per second, which further increases their accuracy.

Laser cooling and trapping experiments for cesium atoms in ...

Atomic beam cesium atoms were decelerated by counterpropagating radiation from semiconductor laser diodes. The laser frequency was chirped to keep it in resonance with the decelerated atoms. The decelerated atoms were trapped by six mutually orthogonal laser beams in …

Quantum Computer: Laser tweezers sort atoms

Jul 12, 2006 · Quantum Computer: Laser tweezers sort atoms. In the experiment the research team headed by Dr. Arno Rauschenbeutel and Professor Dieter Meschede decelerated several caesium atoms for a period of several seconds so that they were hardly moving, then loaded them onto a conveyor belt consisting of lasers.

Velocity Control of Cesium Atomic Beam Using Two Frequency ...

Figure 3 shows the velocity distribution of the cesium atomic beam after white-light cooling using two ECDLs. In Fig. 3(a), a fraction of atoms with a lower velocity was accelerated using a Littrow-type ECDL with a 100MHz spectral width and a fraction of atoms with a higher velocity was decelerated using a Littman-type ECDL with a 50MHz spectral width.

Quantum dynamics of atomic and molecular systems

In our new experimental setup Cs atoms and Li atoms are decelerated in a double-species Zeeman slower before they a captured in a MOT. For further cooling of Li we use evaporative techniques in a 200 W crossed optical dipole trap. In the case of Cs degenerate …

Next step to the quantum computer - Phys.org

Oct 06, 2004 · Next step to the quantum computer. In their experiment the physicists first decelerated caesium atoms so that they were scarcely moving. Five of these cool atoms were then loaded onto a laser beam, a stationary light wave consisting of many peaks and troughs – roughly comparable to a piece of corrugated cardboard.

How Does a Practical Cesium Atomic Clock Work? - How ...

Cesium 133 is the element most commonly chosen for atomic clocks. To turn the cesium atomic resonance into an atomic clock, it is necessary to measure one of its transition or resonant frequencies accurately. This is normally done by locking a crystal oscillator to the principal microwave resonance of the cesium atom.

Gridded ion thruster - Wikipedia

The gridded ion thruster is a common design for ion thrusters, a highly efficient low-thrust spacecraft propulsion running on electrical power. These designs use high-voltage grid electrodes to accelerate ions with electrostatic forces.

What is the famous experiment of Dr.Lijun Wang involving ...

Sep 01, 2011 · The work of Dr. Lijun Wang at the NEC research institute in Princeton seems to have given us a glimpse of multi-dimensional reality. When Wang recently transmitted a pulse of light towards a chamber filled with specially treated cesium gas, and recorded its travel through the chamber at an accelerated speed of up to 300 times the speed of light, he proved the possibility of time travel.

Cold atom gravimeter - University of Ljubljana

Caesium atoms in an atomic fountain. Caesium is one of the heaviest bosons, which means it’s easier to cool than lighter elements and even Bose Einstein condensate is in reach. It’shyperfinegroundstateis6s 1/2,F= 3,M F = 0, withamicrowavetransitionto 6s 1/2, F= 4, M F = 0 and opticaltransitionsto6p 3/2,F0= 4 orF0= 5. 3.1 Stimulated Raman transition

BBC News | SCI/TECH | Beam smashes light barrier

Jul 19, 2000 · Scientists have seen a pulse of light emerge from a cloud of gas before it even entered. This astonishing and baffling observation was made by researchers from the NEC Research Institute in Princeton, US. They conducted an experiment that involved lasers, a chamber containing cold caesium atoms …

Laser tweezers sort atoms work towards quantum computer ...

Jul 16, 2006 · In the experiment the research team headed by Dr. Arno Rauschenbeutel and Professor Dieter Meschede decelerated several caesium atoms for a period of several seconds so that they were hardly moving, then loaded them onto a ‘conveyor belt’ consisting of lasers.

Laser tweezers sort atoms - nanowerk.com

Jul 12, 2006 · In the experiment the research team headed by Dr. Arno Rauschenbeutel and Professor Dieter Meschede decelerated several caesium atoms for a period of several seconds so that they were hardly moving, then loaded them onto a conveyor belt consisting of lasers.

Alternating gradient focusing and deceleration of polar ...

Alternating gradient focusing and deceleration of ... packets of Stark decelerated molecules have ... [25] and caesium atoms in an atomic fountain [26]. Furthermore, the transmission of methylfluoride molecules through a 15 m long AG beamline was modelled and optimized [27].

Anoptical conveyor beltfor single neutral atoms

slow cesium atoms from the background vapor and cool them down to about Doppler temperature. The high magnetic field gradient of 400 Gauss/cm localizes the trapped atoms to a region of diameter 30 µm which is ... half of d and decelerated in the same manner along the second half.

The Atom-Sorting Machine - news.softpedia.com

Jul 13, 2006 · Laser tweezers sort atoms: Bonn physicists take major hurdle on path to quantum computer. In the experiment the research team headed by Dr. Arno Rauschenbeutel and Professor Dieter Meschede decelerated several caesium atoms for a period of several seconds so that they were hardly moving, then loaded them onto a conveyor belt consisting of lasers.

(PDF) Short-Distance Atomic Beam Deceleration with a ...

Short-Distance Atomic Beam Deceleration with a Stimulated Light Force. We have decelerated a cesium atomic beam from thermal velocities down to several tens of mys within only a 10 cm slowing distance. A bichromatic standing light wave was used to generate a stimulated force exceeding the spontaneous force limit by a factor...

Two Step Deceleration of Cesium Atomic Beam by Frequency ...

The velocity of a cesium atomic beam was controlled using two broadband frequency-modulated, external-cavity diode lasers. One laser beam was used to …

Laser tweezers sort atoms | EurekAlert! Science News

In the experiment the research team headed by Dr. Arno Rauschenbeutel and Professor Dieter Meschede decelerated several caesium atoms for a period of several seconds so that they were hardly...

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