Quantum state storage in a travelling dark-state polariton under a standing wave control laser field in a solid-state medium

• Published in: European physical journal plus Vol. 139; no. 8; p. 724
• Main Authors: Chakraborty, Avirup, Chakrabarti, Shrabana
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 13.08.2024; Springer Nature B.V
• Subjects: Applied and Technical Physics; Atomic; Complex Systems; Condensed Matter Physics; Fourier transforms; Information storage; Lasers; Mathematical and Computational Physics; Molecular; Nonlinear control; Nonlinearity; Optical and Plasma Physics; Photonic crystals; Physics; Physics and Astronomy; Polaritons; Propagation; Quantum computing; Regular Article; Standing waves; Theoretical
• ISSN: 2190-5444; 2190-5444
• DOI: 10.1140/epjp/s13360-024-05521-4

In this paper, we derive an expression for the dark-state polariton field, formed by the superposition of atomic and photonic states, for the case of a travelling probe laser pulse under the application of a standing wave control laser pulse for a lambda-level scheme EIT System in a solid crystal. We show how an enhancement in the nonlinearity of the EIT process by eliminating pulse broadening due to diffusion can be achieved in the case of a travelling probe pulse under the effect of standing wave control laser pulses. At last, we propose an experiment that can help realise the storage of a probe pulse in the hyperfine levels 3 H 4  ↔  1 D 2 of Pr 3+ : Y 2 SiO 5, cryogenically cooled at 4.5 K. We, at last, predict from the temporal variation of the energy density of the stored probe pulse that a longer storage time of the travelling probe pulse is possible for a perfect standing wave control laser field than a non-standing control wave, due to its more prominent nonlinear effect.