Pauli blocking of stimulated emission in a degenerate Fermi gas
arXiv:2204.00439 · doi:10.1038/s41467-022-34135-6
Abstract
The Pauli exclusion principle in quantum mechanics has a profound influence on the structure of matter and on interactions between fermions. Almost 30 years ago it was predicted that the Pauli exclusion principle could lead to a suppression of spontaneous emission, and only recently several experiments confirmed this phenomenon. Here we report that this so-called Pauli blockade not only affects incoherent processes but also, more generally, coherently driven systems. It manifests itself as an intriguing sub-Doppler narrowing of a doubly-forbidden transition profile in an optically trapped Fermi gas of . By actively pumping atoms out of the excited state, we break the coherence of the excitation and lift the narrowing effect, confirming the influence of Pauli blockade on the transition profile. This new insight into the interplay between quantum statistics and coherent driving is a promising development for future applications involving fermionic systems.
arXiv comment36 pages, 8 figures
References in corpus (26)
- Fermionic quantum computation
- Quantum algorithms for quantum chemistry and quantum materials science
- Resolving the gravitational redshift within a millimeter atomic sample
- A Fermi-degenerate three-dimensional optical lattice clock
- Radio-Frequency Spectroscopy of Ultracold Fermions
- Trapped Fermi gases
- Atom interferometry with trapped Fermi gases
- High precision differential clock comparisons with a multiplexed optical lattice clock
- Frequency metrology in quantum degenerate helium: Direct measurement of the 2 3S1 - 2 1S0 transition
- Probing Interactions between Ultracold Fermions
- Mesoscopic Fermi gas in a harmonic trap
- Exploring a quantum degenerate gas of fermionic atoms
- Comparing a mercury optical lattice clock with microwave and optical frequency standards
- Precision spectroscopy of helium in a magic wavelength optical dipole trap
- Inhibition of spontaneous emission in Fermi gases
- Quantum Register of Fermion Pairs
- Observation of Pauli blocking in light scattering from quantum degenerate fermions
- Pauli blocking of atomic spontaneous decay
- Spatial Pauli-blocking of spontaneous emission in optical lattices
- Magic wavelengths for the transition in helium
- Comparison of spectral linewidths for quantum degenerate bosons and fermions
- Enhanced Pauli blocking of light scattering in a trapped Fermi gas
- A simple 2 W continuous-wave laser system for trapping ultracold metastable helium atoms at the 319.8 nm magic wavelength
- Optical Quenching of Metastable Helium Atoms using Excitation to the State
- Spontaneous Emission in ultra-cold spin-polarised anisotropic Fermi Seas
- All-optical cooling of Fermi gases via Pauli inhibition of spontaneous emission