Sideband cooling of atoms with the help of an auxiliary transition

Abstract

We propose a cooling scheme for the V-type three-level atom tightly confined in a harmonic trap. Two excited levels are coupled to the ground state by a quadrupole transition with small dissipation rate and a dipole transition with large dissipation rate respectively. The quadrupole transition is strongly driven by a runningwave laser 1, which acts as the cooling channel in the Lamb-Dicke regime. The dipole one is weakly driven by another running-wave laser 2 as the auxiliary transition. The ground-state cooling with large rate can be achieved through the appropriate choice of the Rabi frequency of laser 1 and the detuning of the auxiliary transition.

Quantum Thermodynamics: A Dynamical Viewpoint

“…In this context, it is obtained by reversing the operation of a three-level laser [51,52,[66][67][68][69][70][71][72][73][74][75][76][77][78]. A quantum absorption refrigerator has also been studied, which is a refrigerator with heat as its power source [53,70,79,80].…”

Transparency and tunable slow and fast light in a nonlinear optomechanical cavity

“…1 , the model that we consider is a nonlinear optomechanical system, where a degenerate OPA and N identical two-level atoms (with transition frequency ω b and decay rate γ b ) are placed in a Fabry-Férot cavity with length L consisting of one fixed mirror and one movable mirror. Specifically, we consider a quadrupole transition between the 6 s 2 1 S 0 ground state | g 〉 and the 6 s 6 p 3 P 1 excited state | e 〉 of atomic barium for the two-level atoms 48 49 . The transition wavelength between the two states in atomic barium and the decay rate of the excited state to the ground state are λ = 791 nm and γ b = 47 kHz, respectively 48 .…”

Cooling a two-level emitter in photonic-crystal environments

“…Notice that the expressions (13) are valid for t ≫ (2Ω) −1 and ηΩ < Max{γ ± , γ 0 } ≪ 2Ω. Furthermore, our cooling approach requires that {2γ s , Γ ⊥ } ≫ C which, in principle, can always be arranged.…”

“…The experimental demonstration of ground-state laser cooling with electromagnetically induced transparency (EIT) [9] was performed in [10] for single-ion systems and in [11] for an ion chain. Furthermore, double-EIT ground-state laser cooling without blue-sideband heating was proposed in [12] while sideband cooling of atoms with the help of an auxiliary transition in [13], and Raman sideband cooling of a single atom in an optical tweezer in Ref. [14], respectively.…”