1,808 research outputs found
Photon creation in a resonant cavity with a nonstationary plasma mirror and its detection with Rydberg atoms
We investigate the dynamical Casimir effect and its detection with Rydberg
atoms. The photons are created in a resonant cavity with a plasma mirror of a
semiconductor slab which is irradiated by periodic laser pulses. The canonical
Hamiltonian is derived for the creation and annihilation operators showing the
explicit time-variation in the couplings, which originates from the external
configuration such as a nonstationary plasma mirror. The number of created
photons is evaluated as squeezing from the Heisenberg equations with the
Hamiltonian. Then, the detection of the photons as the atomic excitations is
examined through the atom-field interaction. Some consideration is made for a
feasible experimental realization with a semiconductor plasma mirror.Comment: 8 pages, 2 figure
Optical homodyne detection in view of joint probability distribution
Optical homodyne detection is examined in view of joint probability
distribution. It is usually discussed that the relative phase between
independent laser fields are localized by photon-number measurements in
interference experiments such as homodyne detection. This provides reasoning to
use operationally coherent states for laser fields in the description of
homodyne detection and optical quantum-state tomography. Here, we elucidate
these situations by considering the joint probability distribution and the
invariance of homodyne detection under the phase transformation of optical
fields.Comment: 8 pages, 2 figures; REVTeX 4.
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