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Vortex stability and permanent flow in nonequilibrium polariton condensates
G. Tosi, D. Sanvitto, M. Baudisch +6
We study the effects of imprinting a single-quantized vortex on the steady state of a microcavity exciton-polariton condensate generated via parametric scattering. Interestingly we…
Generation of a spin-polarized electron beam by multipoles magnetic fields
Ebrahim Karimi, Vincenzo Grillo, Robert W. Boyd +1
The propagation of an electron beam in the presence of transverse magnetic fields possessing integer topological charges is presented. The spin--magnetic interaction introduces a n…
Influence of generalized focusing of few-cycle Gaussian pulses in attosecond pulse generation
Ebrahim Karimi, Carlo Altucci, Valer Tosa +2
In contrast to the case of quasi-monochromatic waves, a focused optical pulse in the few-cycle limit may exhibit two independent curved wavefronts, associated with phase and group…
Test of mutually unbiased bases for six-dimensional photonic quantum systems
Vincenzo D'Ambrosio, Filippo Cardano, Ebrahim Karimi +4
In quantum information, complementarity of quantum mechanical observables plays a key role. If a system resides in an eigenstate of an observable, the probability distribution for…
Violation of Leggett-type inequalities in the spin-orbit degrees of freedom of a single photon
Filippo Cardano, Ebrahim Karimi, Lorenzo Marrucci +2
We report the experimental violation of Leggett-type inequalities for a hybrid entangled state of spin and orbital angular momentum of a single photon. These inequalities give a ph…
Integrated multi vector vortex beam generator
Sebastian A. Schulz, Taras Machula, Ebrahim Karimi +1
A novel method to generate and manipulate vector vortex beams in an integrated, ring resonator based geometry is proposed. We show numerically that a ring resonator, with an approp…