On the polarization rotation by means of electromagnetically induced transparency

Решетов, В. А.

doi:10.1088/1612-202x/ac0bc3

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“…The photon polarization provides the most natural way for qubit encoding. The qubit encoded in the photon polarization may be stored in the Zeeman sublevels of the ground atomic state by means of reduction of the group velocity of the probe pulse [26][27][28][29], while for the implementation of single-qubit gates the controlled polarization rotation of the probe pulse may be applied [30,31]. For the implementation of two-qubit gates with polarization-encoded photon qubits the double-Λ EIT may be appropriate, which may enable the controlled mutual polarization rotation of the two weak probe fields induced by their cross-phase modulations.…”

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confidence: 99%

Double-Λ electromagnetically induced transparency with degenerate atomic levels

Решетов¹

2022

Laser Phys. Lett.

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The general expression for the transformation matrix of the two input weak arbitrarily polarized probe fields passing through the medium under the conditions of double-Λ electromagnetically induced transparency is obtained for arbitrary values of the amplitudes, phases and polarizations of the control fields and arbitrary values of the angular momenta of resonant levels. The conditions are found for the two input weak probe fields linearly polarized in perpendicular planes to exchange their polarizations after the passage through the medium without absorption. The polarization rotation of the probe fields is studied for the atoms being initially in the equilibrium state.

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