A theoretical analysis on quantum memory parameters in ultracold $$^{87}$$Rb and $$^{133}$$Cs alkali species using EIT protocol in the presence of structured light

Manchaiah, Dixith; Kumar, Rohit; Easwaran, Raghavan K.

doi:10.1007/s11128-022-03449-1

Cited by 6 publications

(6 citation statements)

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“…A detailed calculation for the susceptibilty (χ ± ) is given in the appendix. Absorption and dispersion of the probe light are then obtained by taking the imaginary and real parts of the complex susceptibility given by equation (12). In the next section, a detailed study of probe response with different physical conditions is obtained.…”

Section: ⎛ ⎝ ⎞mentioning

confidence: 99%

“…A key result of these studies is narrowing of EIT linewidth which is beneficial for quantum technological application point of view. Dixith et al [12] have numerically estimated quantum memory parameters for the structured light interaction in the case of Rb and Cs atomic system. A recent numerical study shows that LG modes can enhance microwave electric field sensing capability [13].…”

Section: Introductionmentioning

confidence: 99%

“…In steady state case, time derivative will be zero and putting the power series expansion given in equation(17) and collecting the like powers of (Ω 1 , Ω 2 ) gives three coupled algebraic equation which can be easily solved analytically. Following initial conditions can be utilized to arrive at the steady state solution-zeroth order populations are given by Above expression can be used to obtain the susceptibility for the double Λ atomic system χ ±,DL with the help of equation(12) with following identification -…”

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confidence: 99%

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Interaction of four level closed loop atomic systems in the presence of two vector beams

2023

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In this manuscript, we have theoretically studied the four level closed loop atomic systems in the presence of two vector beams. A spatially dependent transparency for the probe vector beam is obtained based on the semiclassical model. We have explicitly shown that the number of petals formed for probe absorption depends on the value of orbital angular momentum (OAM) of the constituting beams. A detailed study for absorption and dispersion of right circularly polarized (RCP) and left circularly polarized (LCP) components of the probe beam is carried out and the importance of the polarization state of the beams on Higher Order Poincare Sphere (HOPS) is highlighted. An explicit effect of the interferometer phase of the vector beam which is geometric in nature, is shown for probe beam response. Three types of four level closed loop atomic system is studied with particular emphasis given for double Λ and Diamond atomic system. A dark state analysis of the atomic system is carried out which facilitate a physical understanding of the obtained results. Our study has explored the effects of inhomogeneity in both polarization and intensity for probe and coupling beam in a closed loop atomic system which is phase dependent.

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Section: ⎛ ⎝ ⎞mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Interaction of four level closed loop atomic systems in the presence of two vector beams

2023

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“…Due to helical phase dependence and also phase singularity, they are also called as vortex beams. EIT in the presence of vortex coupling light is established experimentally and theoretically [26][27][28][29][30]. LG beam carrying OAM as a coupling light introduces narrowing of EIT resonance at higher l values [26,28,31] due to the reduction in effective Rabi frequency of the coupling light.…”

Section: Introductionmentioning

confidence: 99%

“…LG beam carrying OAM as a coupling light introduces narrowing of EIT resonance at higher l values [26,28,31] due to the reduction in effective Rabi frequency of the coupling light. Narrow EIT spectrum has a direct consequence in the group velocity of probe light enabling quantum memory [5,29] and also has applications in the field of precision measurements [6,32]. Polarization effects on the probe light in the presence of vortex coupling light has remained unexplored in the context of EIT.…”

Section: Introductionmentioning

confidence: 99%

Interplay of polarizations in a cascade EIT system in the presence of vortex coupling light in ⁸⁷Rb atomic vapor medium

2023

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We investigate both experimentally and theoretically the cascade electromagnetically induced transparency(EIT) in 5S1/2 − 5P3/2 − 5D5/2 configuration in 87 Rb atomic vapor medium in the presence of vortex coupling Laguerre Gaussian(LG) light. We demonstrated Doppler free double resonance EIT structure in cascade configuration and observed transmission spectra for H-H and σ+-σ+ polarized probe and coupling lights. We demonstrate that the double resonance structure can be identified by two photon transition probabilities and it is found to be F” = 2 and F” = 3. By considering coupling LG light, several polarization combinations are taken into account, and their effects on amplifying and diminishing the EIT resonances are demonstrated experimentally. In order to understand the polarization effects of vortex coupling light on EIT spectrum in a degenerate multilevel atomic system, a theoretical model is developed by considering a simplified double hut level structure. Semi-classical density matrix analysis is used to understand the dynamics and also to establish the enhancement and reduction of EIT peak height with coupling light polarizations. The impact of two photon transition probabilities polarization combinations and relative orientations of probe and coupling lights in degenerate multilevel atomic systems leads to modification of EIT resonances significantly. We establish quantitative agreement between our theory and experimental results.

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Impact of higher-order laguerre-gaussian modes on electromagnetically induced transparency resonances in $$^{87}$$Rb atomic vapor medium

Manchaiah,

Kumar,

Chauhan

et al. 2024

J Opt

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A theoretical analysis on quantum memory parameters in ultracold $$^{87}$$Rb and $$^{133}$$Cs alkali species using EIT protocol in the presence of structured light

Cited by 6 publications

References 61 publications

Interaction of four level closed loop atomic systems in the presence of two vector beams

Interaction of four level closed loop atomic systems in the presence of two vector beams

Interplay of polarizations in a cascade EIT system in the presence of vortex coupling light in ⁸⁷Rb atomic vapor medium

Impact of higher-order laguerre-gaussian modes on electromagnetically induced transparency resonances in $$^{87}$$Rb atomic vapor medium

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A theoretical analysis on quantum memory parameters in ultracold $$^{87}$$Rb and $$^{133}$$Cs alkali species using EIT protocol in the presence of structured light

Cited by 6 publications

References 61 publications

Interaction of four level closed loop atomic systems in the presence of two vector beams

Interaction of four level closed loop atomic systems in the presence of two vector beams

Interplay of polarizations in a cascade EIT system in the presence of vortex coupling light in 87Rb atomic vapor medium

Impact of higher-order laguerre-gaussian modes on electromagnetically induced transparency resonances in $$^{87}$$Rb atomic vapor medium

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Interplay of polarizations in a cascade EIT system in the presence of vortex coupling light in ⁸⁷Rb atomic vapor medium