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Non-exponential decay of a giant artificial atom
- Source :
- Nature Physics. 15:1123-1127
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- In quantum optics, light–matter interaction has conventionally been studied using small atoms interacting with electromagnetic fields with wavelength several orders of magnitude larger than the atomic dimensions1,2. In contrast, here we experimentally demonstrate the vastly different ‘giant atom’ regime, where an artificial atom interacts with acoustic fields with wavelength several orders of magnitude smaller than the atomic dimensions. This is achieved by coupling a superconducting qubit3 to surface acoustic waves at two points with separation on the order of 100 wavelengths. This approach is comparable to controlling the radiation of an atom by attaching it to an antenna. The slow velocity of sound leads to a significant internal time-delay for the field to propagate across the giant atom, giving rise to non-Markovian dynamics4. We demonstrate the non-Markovian character of the giant atom in the frequency spectrum as well as non-exponential relaxation in the time domain. By coupling a superconducting qubit to surface acoustic waves the ‘giant atom’ regime is realized, where an atom is coupled to a field with wavelength orders of magnitude smaller than the atomic size. This leads to non-Markovian qubit dynamics.
- Subjects :
- Condensed Matter::Quantum Gases
Quantum optics
Physics
Quantum Physics
Field (physics)
FOS: Physical sciences
General Physics and Astronomy
Acoustic wave
7. Clean energy
01 natural sciences
010305 fluids & plasmas
Wavelength
Orders of magnitude (time)
Qubit
0103 physical sciences
Atom
Physics::Atomic and Molecular Clusters
Physics::Atomic Physics
Exponential decay
Atomic physics
Quantum Physics (quant-ph)
010306 general physics
Subjects
Details
- ISSN :
- 17452481 and 17452473
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- Nature Physics
- Accession number :
- edsair.doi.dedup.....6421a5dc6663c61e813937856ecaee19