We present a method of nondestructive characterization of cold and trapped caesium atomic samples which relies on optical phase-shift measurement in a shot-noise-limited Mach-Zehnder white-light ...
اقرأ المزيد
A group of cold caesium atoms have been trapped at a temperature equal to twice the Doppler-limited temperature ???? as preparation for being part of an atomic fountain clock. The trap is a set of 6 orthogonal laser beams which have been tuned to just above the resonance wavelength for absorption ie red detuned. In order to launch a group of ...
اقرأ المزيد
The motion of individual cesium atoms trapped inside an optical resonator is revealed with the atom-cavity microscope (ACM). A single atom moving within the …
اقرأ المزيد
Qubits encoded on neutral atoms trapped in an optical lattice provide a scalable architecture for digital quantum computing 1. One-qubit and two-qubit gate operations have previously been ...
اقرأ المزيد
This configuration allows caesium atoms to be trapped in the waveguide gap by using a dielectric-band blue-detuned from the D1 line as a trapping beam and the air-band mode as a probe on the D2 ...
اقرأ المزيد
Caesium-133 atoms have been evaporatively cooled in a magnetic trap to tem-peratures as low as 8nK producing a final phase-space density within a factor of 4 of that required for the onset of Bose-Einstein condensation. At the end of the forced radio-frequency evaporation, 1500 atoms in the F = 3;mF = ¡3 state remain in the magnetic trap.
اقرأ المزيد
sium atoms confined in an optical cavity field at the magic wavelength of 935.6 nm was demonstrated by McKeever et al. [9] in the context of cavity quantum electrodynamics. It was shown that continuous monitoring of trapped atoms becomes possible with state-insensitive trapping. Later in 2010, state-insensitive trapping of caesium atoms in free
اقرأ المزيد
The caesium fountain clock has an accuracy of about three parts in 10 quadrillion (3 × 10 −16 ). This means that it will keep time to within one second over 100 million years. But some newer ...
اقرأ المزيد
Recent breakthroughs in the control of single atoms trapped in optical lattices and optical tweezers have started to show the potential of a bottom-up assembly of quantum matter atom-by-atom, and controlling all …
اقرأ المزيد
We have evaporatively cooled caesium atoms in a magnetic trap to temperatures as low as 8 nK and produced a final phase space density within a factor of four of that required for the onset of Bose ...
اقرأ المزيد
A novel dipole force trap was developed for trapping caesium atoms in the lower hyperfine level of the ground state and in preliminary experiments a cloud of ≈1000 atoms was trapped.
اقرأ المزيد
To realize a related technique in the context of cold-atom physics, we first trapped and cooled caesium atoms to sub-millikelvin temperatures inside a vacuum chamber using a magneto-optical trap 1.
اقرأ المزيد
Here we demonstrate a strong and tunable Rydberg-dressed interaction between spins of individually trapped caesium atoms with energy shifts of order 1 MHz in units of Planck's constant.
اقرأ المزيد
Schematics of the experimental process a, Laser-cooled caesium atoms are trapped along an optical nanofibre. Probe light, resonant with the Cs D2 cycling transition, is launched into the fibre and ...
اقرأ المزيد
A device with six qubits made from neutrally charged caesium atoms trapped in a grid with lasers shows a promising alternative approach to the current leading quantum computers....
اقرأ المزيد
A dense gas of cesium atoms at the crossover to two dimensions is prepared in a highly anisotropic surface trap that is realized with two evanescent light …
اقرأ المزيد
We experimentally study the ground state coherence properties of cesium atoms in a nanofiber-based two-color dipole trap, localized ∼ 200 nm away from the …
اقرأ المزيد
Previous caesium clocks kept time accurately to within a second over the course of 300 million years. ... They cooled the atoms to -273˚C and trapped each one in its own spot to control the ...
اقرأ المزيد
We present a method of nondestructive characterization of cold and trapped caesium atomic samples which relies on optical phase-shift measurement in a shot-noise-limited Mach-Zehnder white-light interferometer. The phase shift imposed on an off-resonant light due to dispersive interaction with atoms is monitored via a pulsed homodyne detection
اقرأ المزيد
Cesium atoms accumulate to a region inside the cell where several beams from two frequency -stabilized diode lasers intersect. Up to 10^8 atoms are trapped to a density …
اقرأ المزيد
To realize a related technique in the context of cold-atom physics, we first trapped and cooled caesium atoms to sub-millikelvin …
اقرأ المزيد
Here, by using arrays of individual caesium atoms trapped along an optical nanofibre6,7, we observe a single collective atomic excitation8,9 coupled to a nanoscale waveguide. The stored collective ...
اقرأ المزيد
Cesium hydroxide (CsOH), containing the hydroxide anion (OH –), is the strongest base known, attacking even glass. Some cesium salts are used in making mineral waters. Cesium forms a number of …
اقرأ المزيد
Oberthaler's group squeezed the noise down even farther in a different system--this time for BEC atoms trapped in an 'optical lattice' by a network of laser beams. ... which uses caesium standards ...
اقرأ المزيد
A string of such trapped Caesium atoms has thus been used to realize a quantum register, where individual atoms were addressed with microwave pulses in combination with a magnetic field gradient. Using this method, we have demonstrated all basic register operations: initialization, selective addressing, coherent manipulation, and …
اقرأ المزيد
The atoms were trapped in a novel trap that employed both magnetic and optical forces. Evaporative cooling increased the phase-space density by 6 orders of magnitude within seven seconds.
اقرأ المزيد
Bose-Einstein condensation of cesium atoms is achieved by evaporative cooling using optical trapping techniques. The ability to tune the interactions between the ultracold atoms by an external magnetic field is crucial to obtain the condensate and offers intriguing features for potential application …
اقرأ المزيد
. A novel dipole force trap was developed for trapping caesium atoms in the lower hyperfine level of the ground state and in preliminary experiments a cloud of #1000 …
اقرأ المزيد
Abstract. By integrating the techniques of laser cooling and trapping with those of cavity quantum electrodynamics (QED), single cesium atoms have been …
اقرأ المزيد
We experimentally study the ground state coherence properties of cesium atoms in a nanofiber-based two-color dipole trap, localized ∼200 nm away from the fiber …
اقرأ المزيد
It has been observed (Drewsen M. et al., Appl. Phys. B, 59 (1994) 283) that this temperature excess is proportional to the cube root of the total number of trapped atoms (N1/3). We present an expla...
اقرأ المزيد
Nowadays, caesium primary standards use an arrangement known as an "atomic fountain", in which laser-cooled atoms are launched upwards through a microwave cavity before falling back under gravity. Using cold atoms means the interaction time can be far longer than in a thermal beam clock, giving much higher spectral resolution.
اقرأ المزيد
Recent work using a two-dimensional tweezer array of caesium atoms demonstrated single-qubit ... Wang, J. & Keloth, J. Real-time observation of single atoms trapped and interfaced to a nanofiber ...
اقرأ المزيد
In a standard atomic clock, a beam of caesium-133 atoms is probed by microwaves that have a frequency of about 9.2 x 10 9 Hz. When the microwave frequency is adjusted to a value of exactly 9192 631 770 Hz, the photons have an energy that is equal to the energy difference between the two very closely spaced energy levels that make up …
اقرأ المزيد
A novel dipole force trap was developed for trapping caesium atoms in the lower hyperfine level of the ground state and in preliminary experiments a cloud of #1000 atoms was trapped. The viability of the trap is discussed, including suggestions for amendments to the trap design and problems that might occur which are intrinsic to the caesium atom.
اقرأ المزيد
Embedding a Bose–Einstein condensate of caesium atoms in a degenerate Fermi gas of lithium atoms gives rise to fermion-mediated attractive boson–boson interactions, which can lead to the ...
اقرأ المزيد