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Nonlinear Dynamics in Quantum Photonic Structures
Published in Joachim Piprek, Handbook of Optoelectronic Device Modeling and Simulation, 2017
Gabriela Slavcheva, Mirella Koleva
Quantum optics unites physical optics and the quantum field theory of light. The foundations of the latter were laid by Planck, who succeeded to explain theoretically the black-body radiation spectrum by postulating that the energy of a harmonic oscillator is quantized. In 1927, Dirac developed this theory by solving the long-standing problem of the wave-particle duality and unifying the wave and particle aspects of light by quantization of the electromagnetic radiation. Thus, according to Dirac's single-particle interpretation, the light emitted from a spontaneously emitting source with low photon density is described as single-photon emission events.
Optical switching and normal mode splitting in hybrid semiconductor microcavity containing quantum well and Kerr medium driven by amplitude-modulated field
Published in Journal of Modern Optics, 2020
Madhav Kumar Singh, Pradip Kumar Jha, Aranya Bhattacherjee
With the advancement of research in quantum optics, it has been demonstrated that optical nonlinearity at a single photon level demonstrates the potential for the implementation of ultra low power and high speed of all optical gates and switches for classical information processing [1–7]. Achieving single photon nonlinearities in solid-state systems usually relies on enhanced light matter coupling of some dipole allowed transition, where excitation can provide the required quantum anharmonicity [8–12]. Several experiments in the past focused on analysing optical nonlinearity and proposed its application for all optical switching [13,14]. For efficient all optical switching, there is a need for optical nonlinearity that can be achieved with low power light. It has been a goal of optical physicist to utilize light to control the transmission of another optical signal, and thus constructing all optical logic gates [15–24]. One of the ways to achieve such phenomena is via optical bistability, in which two distinct output optical powers can be achieved for the same input power [25]. Optical bistability has created a great deal of interest from both fundamental and applicative point of view, for instance, it can be used to implement optical logical elements for all optical information processing and optical transistors. There are many ways to control optical bistability such as quantum interference, squeezed light field and spontaneously generated coherence [26–36].
Entanglement of a new type of two-mode photon-added entangled coherent state
Published in Journal of Modern Optics, 2019
On the other hand, non-Gaussian operation is increasingly recognized as a key role in producing the higher entanglement degree of quantum states to meet the requirement of quantum information protocols for long-distance communication (8). Fabio et al. used the photon subtraction operation to improve inter-mode entanglement between two-mode Gaussian states (9). Then Meng et al. studied the multiple photons subtracted squeezed vacuum state and proved that the photon subtraction operation is an effective way to manipulate optical fields in quantum optics (10). Furthermore, photon-added operations are also used to bring new entanglement resources which are suitable for realization of quantum communication protocols (11,12). In addition, superposed quantum states have also shown various entanglement effects, due to the principle of quantum state superposition (13). For example, Abbasi et al. constructed the superposed nonlinear coherent states which show some new nonclassical aspects of the corresponding states (14).
Radio frequency sideband cooling and sympathetic cooling of trapped ions in a static magnetic field gradient
Published in Journal of Modern Optics, 2018
Theeraphot Sriarunothai, Gouri Shankar Giri, Sabine Wölk, Christof Wunderlich
Cooling trapped atomic ions and neutral atoms close to their vibrational ground state is often a prerequisite for experiments in quantum optics and quantum information science. Cooling beyond the Doppler limit, eventually leading to the vibrational ground state, using sideband cooling was experimentally demonstrated initially using an electric quadrupole transition in a single Hg ion [1] and later using a Raman transition in a single Be ion [2]. Since then several experiments using the resolved sideband cooling technique were carried out and, for example, vibrational ground state occupation probabilities of 99.9% [3] and 99% [4] have been achieved, for ions at an axial trap frequency of MHz and for neutral atoms at a radial trap frequency of kHz, respectively.