Role of spontaneously generated coherence (SGC) in laser cooling of atoms

Abstract

The well-known sub-Doppler polarization gradient cooling in type-I transition ($F_e=F_g+1$) is caused by red-detuned lasers. On the other hand, in type-II transition ($F_e\le F_g$), sub-Doppler cooling takes place through blue-detuned lasers. This opposite behavior for the two types of transitions is due to SGC. In the absence of SGC, both types of transitions show blue-detuned cooling. In this work, we experimentally and theoretically demonstrate blue-detuned cooling for both types of transitions in ${}^{\text{87}}$Rb. For completeness, we compare the temperatures in various configurations.

arXiv comment7 pages, 4 figures

References in corpus (30)

• Ytterbium nuclear-spin qubits in an optical tweezer array
• A practical guide to electromagnetically induced transparency in atomic vapor
• Quenched Narrow-Line Laser Cooling of 40Ca to Near the Photon Recoil Limit
• All-Optical Production of a Lithium Quantum Gas Using Narrow-Line Laser Cooling
• Narrow-line magneto-optical trap for erbium
• Grating chips for quantum technologies
• Three-dimensional Doppler, polarization-gradient, and magneto-optical forces for atoms and molecules with dark states
• Narrow-line Cooling and Determination of Magic Wavelength of Cd
• Low-temperature, high-density magneto-optical trapping of potassium using the open 4S-5P transition at 405 nm
• Narrow-line magneto-optical cooling and trapping of strongly magnetic atoms
• Spectroscopy of a narrow-line laser cooling transition in atomic dysprosium
• Narrow-line magneto-optical trap for dysprosium atoms
• A high flux source of cold strontium atoms
• Blue-Detuned Magneto-Optical Trap of Molecules
• Blue-detuned magneto-optical trap
• Quenched narrow-line second- and third-stage laser cooling of 40Ca
• Quantum interference in a four-level system of a ${}^{87}\mathrm{Rb}$ atom: Effects of spontaneously generated coherence
• Role of different type of sub-systems in doubly driven Lambda-system in 87Rb
• Efficient production of a narrow-line erbium magneto-optical trap with two-stage slowing
• High density loading and collisional loss of laser cooled molecules in an optical trap
• Two-stage magneto-optical trapping and narrow-line cooling of ${}^6$Li atoms to high phase-space density
• A Blue-Detuned Magneto-Optical Trap of CaF Molecules
• Narrow-line magneto-optical trap for europium
• Polarization gradient cooling of single atoms in optical dipole traps
• Narrow-line cooling of ${}^{87}$Rb using 5S${}_{1/2}\to$ 6P${}_{3/2}$ open transition at 420 nm
• Atomic fountain of laser-cooled Yb atoms for precision measurements
• Direct spectroscopy of Rubidium using a narrow-line transition at 420 nm
• Characteristics of unconventional Rb magneto-optical traps
• Continuous loading of magneto-optical trap of Rb at narrow transition
• Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders