Using ultraviolet spectroscopy techniques to monitor quantum interferences, The team was able to observe ultra-fast quantum interference in real time, the electron vibration model in the atomic shell of a noble gas atom.
They are able to monitor vibrations for a period of about 150 seconds, and atosecond is one millionth of a millionth of a second. For this purpose, scientists have excited noble gas atoms with specially prepared laser pulses. Now the researchers using ultraviolet spectroscopy techniques to monitor quantum interferences.
They then followed the atomic reaction with new measurement techniques that allowed them to study the effects of quantum mechanics in atoms and molecules with very high time resolution.
Various chemical reactions such as breaking bonds in molecules caused by the absorption of light. In the first moment after absorption, the distribution of electrons in the atomic shell changes, which significantly influences the direction of the next reaction. This change is very fast; The time scale reaches the attosecond range.
Spectroscopic technology used to date that uses laser pulses does not seem fast enough to track the process.
Researchers around the world are currently developing innovative laser sources and spectroscopic technologies that are suitable in the ultraviolet and X-ray range.
The Stienkemeier team has expanded the known coherent pump probe spectroscopy from the visible spectrum to the ultraviolet range. This is the spectral range between X-rays and ultraviolet rays. For this purpose, scientists in Trieste, Italy, have prepared a series of two ultra-short laser pulses in the extreme ultraviolet range of a free electronic FERMI laser. Using ultraviolet spectroscopy techniques to monitor quantum interferences.
The pulses are separated by certain time intervals and have the exact phase connections determined.
The first impulse starts the process at home electronics (pump process). The second pulse checks the state of the electronic envelope at the next time point (checking process). By changing time intervals and phase relationships, researchers can draw conclusions about the development of electronic envelopes over time.
The biggest challenge is controlling the impulse property precisely and isolating the weak signal.
Physicist Freiburg investigated, inter alia, noble argon gas. In argon, the pulse pump creates a special configuration of two electrons in the atomic shell: this configuration decays and one electron leaves the atom for a very short time, and the atom ultimately remains as an ion. Using ultraviolet spectroscopy techniques to monitor quantum interferences.
Researchers can observe quantum interference interference when an electron leaves an atom.
This experiment paved the way for many new applications in the study of atomic and molecular processes after selective high-energy stimulation in the extreme ultraviolet range.