Atomic Physics

Atomic Physics

Physicists Xiao-Hui Bao and Jian-Wei Pan Stretch Enatglement to 50 Kilometers at the University of Science and Technology of China.

 

Physicists Xiao-Hui Bao and Jian-Wei Pan Stretch Enatglement to 50 Kilometers at the University of Science and Technology of China

 

Entanglement is a quantum mechanical link. An atom can spin both clockwise and counterclockwise at the same time, until measured when its dual state is defined one way or the other.

 

Though individually in uncertain states, whenever two atoms are entangled such that their spins are correlated in opposite directions; when physicists measure the first atom and find it spinning clockwise, they know instantly the other one no matter how far away, must be spinning counterclockwise.

 

With their work at the University of Science and Technology of China in Beijing, physicists Xiao-Hui Bao and Jian-Wei Pan have demonstrated the entanglement link can be stretched to a distance of 50 Kilometers.

 

Working with Atomic and Molecular Systems.

 

Working with Atomic and Molecular Systems

 

Atomic physics involves working with atomic and molecular systems at surfaces, in solids and in the gas phase.

 

Measurement of atomic and molecular systems is used in many applications, such as electricity and magnetism, fluid dynamics, group theory, nuclear physics, physical chemistry, plasma physics, quantum mechanics and surface physics.

 

The study of spin interactions among atoms and nuclei sheds light on how spin polarized atoms are used to answer fundamental questions in particle physics. The spin interactions of atoms offer a vast area for research.

 

Quantum Chaos Applied to Atomic Physics.

 

Quantum Chaos Applied to Atomic Physics

 

Chaos is one of the most active research areas in atomic physics

 

The manifestations of chaos in atoms and molecules and the classical theory of chaos, applied to atomic and molecular systems in physics for microwave-driven surface state electrons, the hydrogen atom in a strong microwave field, the kicked hydrogen atom, chaotic scattering and the helium atom; quantum chaos as specifically applied to atomic physics.

 

 

 

What is the Difference Between Atomic and Nuclear Physics?

 

What is the Difference Between Atomic and Nuclear Physics?

 
Atomic physics pertains to the properties of atoms, resulting from their electron configurations.

 

As far as atomic physics is concerned, the nucleus is a single unit with spin, mass and charge, its internal workings are irrelevant.

 

Nuclear physics relates to the structure of the nucleus, its reactions and interactions.

 

Distance scales are also different, as atomic physics measures distance in nanometers, while nuclear physics measures it in femtometers.

 

Energy scales are different as well, energies in atomic physics range from 1 eV (electron volt) to 1 keV; energies in nuclear physics deal with 1 MeV to 1 GeV.

 

Above the one giga-electron volt level, we start to get into elementary particle physics; however, there are no clear boundaries.

 

The differences in scale and energies can be attributed to differences among the electromagnetic and nuclear forces.

 

Atoms are governed by the electromagnetic force, whereas nuclei are bound by the nuclear force.