Wigner function and photon number distribution of a superradiant state in semiconductor heterostructures
Advanced quantum technologies require sources of non-Gaussian and non-classical light. For the understanding of properties of quantum light it is necessary to reconstruct its quantum state. Here, we use time-domain optical homodyne tomography for the quantum state recognition and reconstruction of t...
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| Veröffentlicht in: | New journal of physics 2020-08, Vol.22 (8), p.83046 |
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| creator | Vasil'ev, Peter P Penty, Richard V |
| description | Advanced quantum technologies require sources of non-Gaussian and non-classical light. For the understanding of properties of quantum light it is necessary to reconstruct its quantum state. Here, we use time-domain optical homodyne tomography for the quantum state recognition and reconstruction of the femtosecond optical field from a nonequilibrium superradiant coherent electron-hole state formed in a semiconductor GaAs/AlGaAs heterostructure. We observe severe deviations from the Poissonian statistics of the photons associated with the coherent state when the transformation from lasing to superradiance occurs. The estimated Mandel parameter Q of the superradiant states is in the range of 1.08-1.89. The reconstructed Wigner functions show large areas of negative values, a characteristic sign of non-classicality, demonstrating the quantum nature of the generated superradiant emission. The photon number distribution and Wigner function of the superradiant state are very similar to those of the displaced Fock state. |
| doi_str_mv | 10.1088/1367-2630/aba3e8 |
| format | Article |
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| subjects | displaced Fock state Heterostructures homodyne tomography Parameter estimation Photons Physics superradiance Wigner function |
| title | Wigner function and photon number distribution of a superradiant state in semiconductor heterostructures |
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