Volume 115, Number 1, July 2016
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||08 August 2016|
-symmetry in Rydberg atoms
1 Institute of Photonics and Technologies, National Tsing-Hua University - Hsinchu 300, Taiwan
2 Quantum Optics Lab. Department of Physics, COMSATS institute of information technology - Islamabad, Pakistan
3 Physics Division, National Centre for Theoretical Science - Hsinchu 300, Taiwan
Received: 28 January 2016
Accepted: 14 July 2016
We propose a scheme to realize parity-time ()-symmetry in an ensemble of strongly interacting Rydberg atoms, which act as superatoms due to the dipole blockade mechanism. We show that Rydberg-dressed 87Rb atoms in a four-level inverted Y-type configuration is highly efficient to generate the refractive index for a probe field, with a symmetric (antisymmetric) profile spatially in the corresponding real (imaginary) part. Comparing with earlier investigations, the present scheme provides a versatile platform to control the system from -symmetry to non--symmetry via different external parameters, i.e., coupling field detuning, probe field intensity and control field intensity.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 11.30.Er – Charge conjugation, parity, time reversal, and other discrete symmetries / 78.20.Ci – Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
© EPLA, 2016
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