Single or entangled photon states are vital for quantum communication. They can be generated on-demand by solid-state quantum emitters. Achieving high-fidelity photons depends on the excitation process. In addition to more established schemes, we present a radically different excitation scheme using two red-detuned laser pulses through the swing-up (SUPER) effect. The SUPER scheme is compared to other schemes like Rabi rotations, phonon-assisted preparation and adiabatic rapid passage. Experimental demonstrations of the different schemes are pointed out. With this, we highlight advancements in photon generation from solid-state quantum emitters.
An all-optical magnetization switching protocol is presented where the magnetization associated with a single
Mn atom embedded in a single CdTe quantum dot is controlled on a picosecond time scale. Even though there is
no direct optical coupling to the Mn spin, the control may be achieved by the optical excitation and manipulation
of spin-polarized carriers that couple to the Mn spin via the exchange interaction. It is shown that the Mn spin
can be selectively driven into each of its spin eigenstates. By suitably chosen pulse sequences also well defined
superposition states can be prepared. The Mn spin dynamics is directly reflected in pump probe type signals.
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