Frequency-modulated excitation of potassium atoms

Optomechanical Quantum Information Processing with Photons and Phonons

“…As indicated in Fig. 1(c), we assume these modes to be separated in frequency and used for cooling the mechanical modes [23,24], and linear photon storage and retrieval operations [7,8,25,26] only.Apart from the coherent dynamics described by Eq. (1), we include dissipation through cavity decay and mechanical damping and model the evolution of the system density operator ρ by a master equation (ME)whereHere, κ is the optical field decay rate, γ = ω m /Q the mechanical damping rate for a quality factor Q and N th = (eh ωm/k B T − 1) −1 the mechanical equilibrium occupation number for temperature T .…”

“…Our approach is depicted in Fig. 4(a), and combines the long coherence times of an OM quantum memory [7,8,25,26] with the practical utility of exploiting interactions between stationary phononic qubits. We focus on the limit Γ m κ, and assume that optical (e.g.…”

“…As indicated in Fig. 1(c), we assume these modes to be separated in frequency and used for cooling the mechanical modes [23,24], and linear photon storage and retrieval operations [7,8,25,26] only.…”

Cavity quantum electrodynamics of a two-level atom with modulated fields

“…Solving either (5) or (8) numerically, the dynamical evolution of the system can easily be obtained for different parametric conditions. The system of nonlinear differential equations (8) includes some terms (δ/δ and δ 2 ) that lead to rapid oscillations of the solution. This makes the set of equations stiff, so very stable numerical algorithms must be used to find its solutions.…”

Preparing a Mechanical Oscillator in Non-Gaussian Quantum States

“…This radiation-pressure-mediated optomechanical coupling is similar to what was considered in Refs. [2,[20][21][22]. However, there are significant differences: (i) This protocol includes both finite interaction time and photon shape, in which case neither the rotating-wave approximation [20] nor the three-mode approach [21] applies; (ii) To better model an actual experiment, we consider a continuous measurement process rather than a single measurement at some given instant as assumed in Ref.…”