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.

PHASE SHIFT AND ABSORBED PROBABILITY OF PHOTONS IN A SINGLE ATOM HIGH Q CAVITY ANALYZED BY SUPERSYMMETRY

2002 ◽  
Vol 16 (26) ◽  
pp. 981-990
Author(s):  
XIAN-TING LIANG
Keyword(s):  
Phase Shift ◽  
Quantum Computation ◽  
Quantum Electrodynamics ◽  
Cavity Quantum Electrodynamics ◽  
Single Atom ◽  
Stable Phase ◽  
Coupling Constant ◽  
Cavity Field ◽  
High Q

In this paper, we investigate the phase shift and absorbed probability of photons in a single atom high Q cavity. It is shown that by adjusting the coupling constant of interaction between atom and cavity field we can obtain a large, stable phase shift with low absorption of photons, which is needed by a qubit for quantum computation. Cavity quantum electrodynamics (QED) and supersymmetry are used in the analysis.

NONPERTURBATIVE THEORY OF CAVITY-CONTROLLED SPONTANEOUS EMISSION OF TWO LEVEL ATOM

1995 ◽  
Vol 09 (24) ◽  
pp. 1577-1587 ◽  
Author(s):  
VLADISLAV F. CHELTSOV
Keyword(s):  
Emission Spectrum ◽  
Spontaneous Emission ◽  
Coupling Constant ◽  
Spontaneous Emission Spectrum ◽  
Energy Eigenvalues ◽  
Level Atom ◽  
Natural Linewidth ◽  
Single Form ◽  
Nonperturbative Theory

Cavity-controlled spontaneous emission spectrum of two level atom coupled to two lossless symmetrically detuned modes has been found rigorously to be a function of the system's energy eigenvalues and displays triplet, doublet or single form depending on detuning, natural linewidth and coupling constant.

scholarly journals Interference-induced enhancement of field entanglement in a microwave-driven V-type single-atom laser

Open Physics ◽  
2014 ◽  
Vol 12 (10) ◽  
Author(s):  
Wen-Xing Yang ◽  
Ai-Xi Chen ◽  
Ting-Ting Zha ◽  
Yanfeng Bai ◽  
Ray-Kuang Lee
Keyword(s):  
Excited States ◽  
Microwave Field ◽  
Resonant Cavity ◽  
Continuous Variable ◽  
Single Atom ◽  
Cavity Field ◽  
Atom Laser ◽  
Decay Channels ◽  
Level Atom ◽  
Atomic Relaxation

AbstractWe demonstrate the generation of two-mode continuous-variable (CV) entanglement in a V-type three-level atom trapped in a doubly resonant cavity using a microwave field driving a hyperfine transition between two upper excited states. By numerically simulating the dynamics of this system, our results show that the CV entanglement with large mean number of photons can be generated even in presence of the atomic relaxation and cavity losses. More interestingly, it is found that the intensity and period of entanglement can be enhanced significantly with the increasing of the atomic relaxation due to the existence of the perfect spontaneously generated interference between two atomic decay channels. Moreover, we also show that the entanglement can be controlled efficiently by tuning the intensity of spontaneously generated interference and the detuning of the cavity field.

EXACT THEORY OF SPONTANEOUS EMISSION OF TWO LEVEL ATOM IN ONE-DIMENSIONAL CAVITY

1995 ◽  
Vol 09 (14) ◽  
pp. 859-870 ◽  
Author(s):  
V. F. CHELTSOV
Keyword(s):  
Emission Spectrum ◽  
Spontaneous Emission ◽  
Zero Temperature ◽  
Coupling Constant ◽  
One Dimensional ◽  
Exact Theory ◽  
Level Atom ◽  
Novel Algorithm

The exact theory of the spontaneous emission of a motionless two level atom in a one-dimensional cavity at zero temperature is presented. In the damped cavity case, using the theory of quasistationary systems and a novel algorithm in operating casual ζ-functions, the theory predicts a hidden-triplet form of emission spectrum which turns abruptly to a singlet when the cavity passive linewidth Γ c /2 becoming equal to twice the coupling constant.

High resolution spectrum of GdO

1976 ◽  
Vol 54 (24) ◽  
pp. 2429-2434 ◽  
Author(s):  
B. R. Yadav ◽  
S. B. Rai ◽  
D. K. Rai
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Visible Emission ◽  
High Resolution Spectrum ◽  
First Order ◽  
Isotopic Shifts ◽  
Vibrational Constants ◽  
Dc Arc

The visible emission spectrum of the GdO molecule has been produced in a DC arc source and has been photographed in the first order of a 10.6 m grating spectrograph. Bands are shown to have a six-headed structure and improved vibrational constants have been obtained in this study. Isotopic shifts have been calculated for the various isotopic molecules. Tentative suggestions regarding the nature of the transition have been made.

Two-photon emission spectrum of a two-level atom in an ideal cavity

1994 ◽  
Vol 49 (5) ◽  
pp. 4009-4015 ◽  
Author(s):  
Lin-sheng He ◽  
Xun-li Feng
Keyword(s):  
Emission Spectrum ◽  
Photon Emission ◽  
Two Photon ◽  
Level Atom

The influence of the classical homogenous gravitational field on interaction of a three-level atom with a single mode cavity field

2015 ◽  
Vol 29 (29) ◽  
pp. 1550175 ◽  
Author(s):  
N. H. Abd El-Wahab ◽  
Ahmed Salah
Keyword(s):  
Electromagnetic Field ◽  
Gravitational Field ◽  
Photon Number ◽  
Single Mode ◽  
Temporal Behavior ◽  
Cavity Field ◽  
Text Type ◽  
Level Atom ◽  
The Mean ◽  
Single Mode Cavity

We study the interaction between a single mode electromagnetic field and a three-level [Formula: see text]-type atom in the presence of a classical homogenous gravitational field when the atom is prepared initially in the momentum eigenstate. The model includes the detuning parameters and the classical homogenous gravitational field. The wave function is calculated by using the Schrödinger equation for a coherent electromagnetic field and an atom is in its excited state. The influence of the detuning parameter and the classical homogenous gravitational field on the temporal behavior of the mean photon number, the normalized second-order correlation function and the normal squeezing is analyzed. The results show that the presence of these parameters has an important effect on these phenomena. The conclusion is reached and some features are given.

scholarly journals Electroweak phase transition with three phases in the SU(2)1 ⊗ SU(2)2 ⊗ U(1)Y model

2019 ◽  
Vol 34 (15) ◽  
pp. 1950073
Author(s):  
Vo Quoc Phong ◽  
Minh Anh Nguyen
Keyword(s):  
Phase Transition ◽  
Coupling Constant ◽  
Gauge Bosons ◽  
Electroweak Phase Transition ◽  
First Order ◽  
First Order Phase Transition ◽  
200 Gev ◽  
Strength Formula ◽  
The Masses ◽  
First Order Phase

Our analysis shows that SM-like electroweak phase transition (EWPT) in the [Formula: see text] (2-2-1) model is a first-order phase transition at the 200 GeV scale (the SM scale). Its strength [Formula: see text] is about 1–2.7 and the masses of new gauge bosons are larger than 1.7 TeV when the second VEV is larger than 535 GeV in a three-stage EWPT scenario and the coupling constant of [Formula: see text] group must be larger than 2. Therefore, this first-order EWPT can be used to fix VEVs and the coupling constant of the gauge group in electroweak models.

A FOUR-LEVEL ATOM INTERACTING WITH A SINGLE-MODE CAVITY FIELD: DOUBLE Ξ-CONFIGURATION

2008 ◽  
Vol 22 (26) ◽  
pp. 2587-2599 ◽  
Author(s):  
N. H. ABDEL-WAHAB
Keyword(s):  
Coherent State ◽  
Time Evolution ◽  
Single Mode ◽  
Cavity Field ◽  
Field System ◽  
Input Field ◽  
Level Atom ◽  
Constants Of Motion ◽  
Q Function ◽  
Single Mode Cavity

In this article, the problem of a double Ξ-type four-level atom interacting with a single-mode cavity field is considered. The considered model describes several distinct configurations of a four-level atom. Also, this model includes the detuning parameters of the atom-field system. We obtain the constants of motion and the wavefunction is derived when the atom is initially prepared in the upper state. We used this model for computing a number of the field aspects for the considered system. As an illustration, the model is used for studying the time evolution of the Mandel Q-parameter, amplitude-squared squeezing phenomenon and Q-function when the input field is considered in a coherent state. The results show that these phenomena are affected by the presence of detuning parameters.

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