Reflectivity and transmissivity of a cavity coupled to a nanoparticle

2014 ◽  
Vol 12 (05) ◽  
pp. 1450025
Author(s):  
M. A. Khan ◽  
K. Farooq ◽  
S. C. Hou ◽  
Shanawer Niaz ◽  
X. X. Yi
Keyword(s):  
Light Scattering ◽  
Laser Field ◽  
Transmission Rate ◽  
Optical Cavity ◽  
Cavity Field ◽  
Reflection And Transmission ◽  
Quantized Fields ◽  
Dielectric Nanoparticle ◽  
Classical Particles ◽  
Optomechanical Cavity

Any dielectric nanoparticle moving inside an optical cavity generates an optomechanical interaction. In this paper, we theoretically analyze the light scattering of an optomechanical cavity which strongly interacts with a dielectric nanoparticle. The cavity is driven by an external laser field. This interaction gives rise to different dynamics that can be used to cool, trap and levitate nanoparticle. We analytically calculate reflection and transmission rate of the cavity field, and study the time evolution of the intracavity field, momentum and position of the nanoparticle. We find the nanoparticle occupies a discrete position inside the cavity. This effect can be exploited to separate nanoparticle and couplings between classical particles and quantized fields.

Nonclassical properties and entanglement generation in an optical cavity containing two atomic Bose–Einstein condensates

2020 ◽  
Vol 34 (06) ◽  
pp. 2050075
Author(s):  
Ren-Fei Zheng ◽  
Qi-Hui Jiang ◽  
Lu Zhou ◽  
Wei-Ping Zhang
Keyword(s):  
Optical Cavity ◽  
Significant Loss ◽  
Cavity Field ◽  
Entanglement Generation ◽  
Field Coupling ◽  
Nonclassical Properties ◽  
Strong Atom ◽  
Collisional Interactions ◽  
Bose Einstein ◽  
Poissonian Statistics

We consider the model of a weakly driven optical cavity containing two clouds of atomic Bose–Einstein condensates (BECs). Nonclassical photon correlations and correlations between the two atomic BECs are investigated under different cavity conditions including strong atom-field coupling and bad cavity regime. We show that the nonlinear interatom collisional interactions in BEC leads to a significant loss of cavity light coherence. Various types of nonclassical properties are investigated such as sub-Poissonian statistics, antibunching and entanglement. We show that the entanglement can be generated between BECs and the cavity field. The time evolution of entanglement is also numerically studied.

EMISSION SPECTRUM OF A TWO-LEVEL ATOM IN AN OPTOMECHANICAL CAVITY

2013 ◽  
Vol 27 (31) ◽  
pp. 1350226
Author(s):  
JI HUI TENG ◽  
HONG FU WANG ◽  
XUE XI YI
Keyword(s):  
Emission Spectrum ◽  
Single Atom ◽  
Coupling Constant ◽  
Cavity Field ◽  
First Order ◽  
Level Atom ◽  
Optomechanical Cavity ◽  
Cavity Mirror

The emission spectrum of a single atom inside an optomechanical cavity is studied in this paper. Our model consists of a single two-level atom coupled to a cavity with a moving end mirror. We numerically calculate the emission spectrum of the atom, taking the effect of the moving mirror into account. The dependence of the spectrum peak on the coupling between the moving mirror and the cavity field is analyzed. For weak cavity-mirror couplings, we expand the spectrum up to the first order of the coupling constant.

scholarly journals Entropic analysis of optomechanical entanglement for a nanomechanical resonator coupled to an optical cavity field

2021 ◽  
Vol 4 (3) ◽  
Author(s):  
Jeong Ryeol Choi
Keyword(s):  
Coupling Strength ◽  
Optical Cavity ◽  
Von Neumann Entropy ◽  
Strong Coupling Regime ◽  
Optical Frequency ◽  
Cavity Field ◽  
Quantum Networks ◽  
Nanomechanical Resonator ◽  
Von Neumann ◽  
Quantum Science

We investigate entanglement dynamics for a nanomechanical resonator coupled to an optical cavity field through the analysis of the associated entanglement entropies. The effects of time variation of several parameters, such as the optical frequency and the coupling strength, on the evolution of entanglement entropies are analyzed. We consider three kinds of entanglement entropies as the measures of the entanglement of subsystems, which are the linear entropy, the von Neumann entropy, and the Rényi entropy. The analytic formulae of these entropies are derived in a rigorous way using wave functions of the system. In particular, we focus on time behaviors of entanglement entropies in the case where the optical frequency is modulated by a small oscillating factor. We show that the entanglement entropies emerge and increase as the coupling strength grows from zero. The entanglement entropies fluctuate depending on the adiabatic variation of the parameters and such fluctuations are significant especially in the strong coupling regime. Our research may deepen the understanding of the optomechanical entanglement, which is crucial in realizing hybrid quantum-information protocols in quantum computation, quantum networks, and other domains in quantum science.

scholarly journals Dynamics of an optomechanical resonator containing a quantum well induced by periodic modulation of cavity field and external laser beam

2015 ◽  
Vol 93 (7) ◽  
pp. 716-724 ◽  
Author(s):  
Sonam Mahajan ◽  
Neha Aggarwal ◽  
Tarun Kumar ◽  
Aranya B. Bhattacherjee ◽  
Man Mohan
Keyword(s):  
Quantum Well ◽  
Laser Beam ◽  
Fluorescent Light ◽  
Periodic Modulation ◽  
Cavity Field ◽  
Nonstationary System ◽  
Two Photon ◽  
Initial Stage ◽  
Photon Process ◽  
Optomechanical Cavity

We study in detail the dynamics of a nonstationary system composed of a quantum well confined in an optomechanical cavity. The cavity frequency is rapidly modulated in time. The resultant periodically modulated spectra are presented. In particular, we study the effect of a two-photon process on the number of intracavity photons. The intensity of fluorescent light emitted by excitons in the quantum well is also examined for this nonstationary system. It is observed that the initial stage of fluorescence spectrum helps in detecting the two-photon process. It is also noticed that under strong modulation, the two-photon process dominates, while under weak modulation, fluorescence dominates. We also analyzed the dynamics of the system induced by a periodic modulation of the external pump laser with constant cavity frequency. This modulation of external laser pump helps in phonon amplification.

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