Journal ArticleDOI
A basis‐independent approach to quantum optics
TLDR
In this paper, it was shown that coherent states and associated phase-space methods can be generalized to this basis-independent representation, and coherent states of the radiation field can be defined without reference to a given basis of normal modes.Abstract:
States of the radiation field can be defined without reference to a given basis of normal modes. In this way optical systems for which there is no natural set of orthogonal modes can be handled quantum mechanically in a more rigorous manner. In particular, coherent states and associated phase‐space methods can easily be generalized to this basis‐independent representation.read more
Citations
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Book ChapterDOI
VI: Tunneling Times and Superluminality
TL;DR: In this paper, the problem of superluminal group velocities has been discussed for the propagation of wave packets tuned to transparent spectral regions of media with inverted atomic populations.
Journal ArticleDOI
Transverse angular momentum of photons
TL;DR: In this paper, the quantum theory of transverse angular momentum of light beams was developed and applied to paraxial and quasiparaxial photon beams in vacuum and reproduces the known results for classical beams when applied to coherent states of the field.
Journal ArticleDOI
The origin of the phase in the interference of Bose-Einstein condensates
TL;DR: In this paper, the authors consider the interference of two overlapping ideal Bose-Einstein condensates and investigate the origin of this phase and the theoretical basis of treating interference, showing that it is possible to construct a phase state for which the particle number is uncertain, but the phase is known.
Journal ArticleDOI
Excess noise in gain-guided amplifiers
TL;DR: In this paper, a second-quantized theory of the radiation field is used to study the origin of the excess noise observed in gain-guided amplifiers, and it is shown that the reduction of the signal-to-noise ratio is a function of the length of the amplifier, and thus the enhancement of the noise is a propagation effect arising from longitudinally inhomogeneous gain of noise rather than from an excess of local spontaneous emission.
Journal ArticleDOI
Single-mode squeezing in arbitrary spatial modes
Marion Semmler,Stefan Berg-Johansen,Vanessa Chille,Christian Gabriel,Peter Banzer,Andrea Aiello,Christoph Marquardt,Gerd Leuchs +7 more
TL;DR: This experiment presents the generation of single-mode squeezing in Laguerre-Gauss and Bessel- Gauss modes, as well as an arbitrary intensity pattern, all from a single setup using a spatial light modulator (SLM).