Atomic electron transition
Atomic electron transition is a change of an electron from one energy level to another within an atom or artificial atom. It appears discontinuous as the electron "jumps" from one energy level to another, typically in a few nanoseconds or less. It is also known as an electronic (de-)excitation or atomic transition or quantum jump.
Electron transitions cause the emission or absorption of electromagnetic radiation in the form of quantized units called photons. Their statistics are Poissonian, and the time between jumps is exponentially distributed. The damping time constant (which ranges from nanoseconds to a few seconds) relates to the natural, pressure, and field broadening of spectral lines. The larger the energy separation of the states between which the electron jumps, the shorter the wavelength of the photon emitted.
However, in 2019 it was demonstrated by Zlatko Minev, in an experiment that he conceived, designed and conducted with a superconducting artificial atom consisting of two strongly-hybridized transmon qubits placed inside a readout resonator cavity at 15 mK, that the evolution of each completed jump is continuous, coherent, deterministic, and reversible. This result calls for a full reassessment of the standard interpretation of Quantum Mechanics, which is built on the assumption that there is no hidden variable intervening between the end states of quantum transitions.
- Schombert, James. "Quantum physics" University of Oregon Department of Physics
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- "Observing the quantum jumps of light" (PDF). Archived from the original (PDF) on November 7, 2010. Retrieved September 17, 2010.
- Itano, W. M.; Bergquist, J. C.; Wineland, D. J. (2015). "Early observations of macroscopic quantum jumps in single atoms" (PDF). International Journal of Mass Spectrometry. 377: 403. Bibcode:2015IJMSp.377..403I. doi:10.1016/j.ijms.2014.07.005.
- Minev, Z. K.; Mundhada, S. O.; Shankar, S.; Reinhold, P.; Gutiérrez-Jáuregui, R.; Schoelkopf, R. J..; Mirrahimi, M.; Carmichael, H. J.; Devoret, M. H. (June 3, 2019). "To catch and reverse a quantum jump mid-flight". Nature. Retrieved June 10, 2019.
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- Ball, Philip (June 5, 2019). "Quantum Leaps, Long Assumed to Be Instantaneous, Take Time". Quanta Magazine. Retrieved June 6, 2019.