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- Title
A theoretical analysis on quantum memory parameters in ultracold 87Rb and 133Cs alkali species using EIT protocol in the presence of structured light.
- Authors
Manchaiah, Dixith; Kumar, Rohit; Easwaran, Raghavan K.
- Abstract
In this paper, we present a theoretical analysis on the study of quantum memory (QM) parameters in a three-level Λ -configuration in the presence of Laguerre–Gaussian (LG) beam for Rubidium-87 and Cesium-133 alkali species in ultracold two-dimensional magneto-optical trap system using the electromagnetically induced transparency (EIT) protocol. We employ semiclassical density matrix approach to solve the three-level atomic system, and quantum memory parameters such as optical depth (OD), group velocity( v g ), EIT spectral width ( Δ f EIT ) and delay bandwidth product (DBP) are estimated and compared for both the species in the presence of various modes of LG beams in detail. We report on predicting high OD of approximately 2323 and 3052 for Rb and Cs species, respectively. In addition to the above, we estimated lowest group velocity v g = 5.07 ms - 1 and highest DBP of 157. EIT spectral width of 503.03 kHz is also reported which has an immense application in broadband quantum communication. This study establishes the vast advantage of LG beams as coupling light over the conventional Gaussian beams by considering the inhomogeneous effects present in the LG modes. Furthermore, it provides insight for coherent storage of quantum information for quantum computation and quantum communication purposes and also to carry out the experiments with various LG modes.
- Subjects
ULTRACOLD molecules; ALKALIES; QUANTUM communication; QUANTUM computing; DENSITY matrices; GAUSSIAN beams; GROUP velocity
- Publication
Quantum Information Processing, 2022, Vol 21, Issue 3, p1
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-022-03449-1