Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Acta Sinica Quantum Optica

Comparative Study on Theories of Light Storage and Magnetic Storage

Hong Mei Guo

Published Jan 1, 2008• 0 citations
OpenAlex

Abstract

Recently,direct light storage based on quantum coherent effects has been proved to be effective throngh experiment.Compared with lots of light storage techniques,quantum coherent storage has a lot in common with widely used traditional magnetic storage technique both in theories and applications.Here this paper compares the magnetic storage and the new storage technique based on the theory of dark state polaritons(DSP) realized using electromagnetic induced transparency (EIT) method.Then it's pointed out that the DSP storage time cannot be extended to classical level in free atomic gases with the lack of the correlations between the atoms.Finally,how the problem could be solved is discussed.

Related papers

QUANTUM STORAGE AND CLONING OF LIGHT STATES IN EIT-LIKE MEDIUM

A. P. ALODJANTS, S. M. ARAKELIAN

In the paper we consider a new approach for storage and cloning of quantum information by three level atomic (molecular) systems in the presence of the electromagnetically induced transparency (EIT) effect. For that, the various schemes of transformation into the bright and dark polaritons for quantum states of optical field in the medium are proposed. Physical conditions of realization of quantum nondemolition (QND) storage of quantum optical state are formulated for the first time. We have shown that the best storage and cloning of can be achieved with the atomic ensemble in the Bose-Einstein condensation state. We discuss stimulated Raman two-color photoassociation for experimental realization of the schemes under consideration.

arXiv:quant-ph/0609189•International Journal of Modern Physics B•May 20, 2006•3 citations

Quantum storage and cloning of light states in EIT-like medium

A. P. Alodjants, Sergei M Arakelyan

In the paper we consider a new approach for storage and cloning of quantum information by three level atomic (molecular) systems in the presence of the electromagnetically induced transparency (EIT) effect. For that, the various schemes of transformation into the bright and dark polaritons for quantum states of optical field in the medium are proposed. Physical conditions of realization of quantum nondemolition (QND) storage of quantum optical state are formulated for the first time. We have shown that the best storage and cloning of can be achieved with the atomic ensemble in the Bose-Einstein condensation state. We discuss stimulated Raman two-color photoassociation for experimental realization of the schemes under consideration.

•Sep 25, 2006•2 citations

Research progress of atomic coherence effect in solid-state materials

Jin-Yue Gao

Atomic coherence is the result of interaction between light and materials,which leads to many important physical phenomenon.Currently,most experimental researches on atomic coherence are reported in atomic gases.Compared with atomic gases,the related experimental researches in solid materials have more practical applications.This paper introduces the recent research progress of atomic coherence in solid-state materials in detail,including the Electromagnetically Induced Transparency(EIT) in solid materials,light velocity reduction and coherent storage,controllable eraser of optical storage information,all-optical route based on optical storage,optical velocity reduction and reversible storage of double light pulses and enhanced four-wave mixing based on atomic coherence,it also discusses its application to relative fields.

Chinese Journal of Optics and Applied Optics•Jan 1, 2010•0 citations

Control of photon propagation via electromagnetically induced transparency in lossless media

L. He, Yu-xi Liu, S. Yi +2 more

We study the influence of a lossless material medium on the coherent storage and quantum-state transfer of a quantized probe light in an ensemble of $\ensuremath{\Lambda}$-type atoms. The medium is modeled as uniformly distributed two-level atoms with the same energy level spacing, coupling to a probe light. This coupled system can be simplified to a collection of two-mode polaritons which couple to one transition of the $\ensuremath{\Lambda}$-type atoms. We show that, when the other transition of $\ensuremath{\Lambda}$-type atoms is controlled by a classical light, electromagnetically induced transparency can also occur for the polaritons. In this case the coherent storage and quantum transfer for photon states are achievable through novel dark states with respect to the polaritons. By calculating the corresponding dispersion relation, we find that the ensemble of three-level atoms with $\ensuremath{\Lambda}$-type transitions may serve as quantum memory for it slows or even stops light propagation through the mechanism of electromagnetically induced transparency.

arXiv:quant-ph/0703115•Physical Review A•Jun 19, 2007•45 citations

Quantum storage of optical signals and coherent manipulation of quantum states based on electromagnetically induced transparency

Hai Wang, Changde Xie, Kunchi Peng

Electromagnetically induced transparency (EIT) techniques are important tools for the storage of the quantum states of light fields in atomic ensembles and for enhancement of the interaction between photons. In this paper, we briefly summarize the recent experimental studies conducted by our group on enhanced cross-phase modulation based on double EIT effects, the quantum interference of stored dual-channel spin-wave excitations and the coherent manipulation of the spin wave vector for the polarization of photons in a single tripod atomic system. The work presented here has potential application in the developing field of quantum information processing.

Chinese Science Bulletin•May 31, 2012•5 citations

Dynamical Symmetry and Its Applications In Electromagnetically Induced Transparency

Xiong-Jun Liu, Hui Jing, Xin Liu +1 more

We study in detail the interesting dynamical symmetry and its applications in various atomic systems with electromagnetically induced transparency (EIT) in this paper. By discovering the symmetrical Lie group of various atomic systems, such as single-atomic-ensemble composed of complex $m$-level $(m>3)$ atoms, and $two$-atomic-ensemble and even multi-atomic-ensemble system composed of of $three$-level atoms etc., one can obtain the general definition of dark-state polaritons (DSPs), and then the dark-states of these different systems. The symmetrical properties of the multi-level system and multi-atomic-ensemble system are shown to be dependent on some characteristic parameters of the EIT system. Furthermore, a controllable scheme to generate quantum entanglement between lights or atoms via quantized DSPs theory is discussed and the robustness of this scheme is analyzed by confirming the validity of adiabatic passage conditions in this paper.

•Oct 18, 2004•0 citations
Recently,direct light storage based on quantum coherent effects has been proved to be effective throngh experiment.Compared with lots of light storage techniques,quantum coherent storage has a lot in common with widely used traditional magnetic storage technique both in theories and applications.Here this paper compares the magnetic storage and the new storage technique based on the theory of dark state polaritons(DSP) realized using electromagnetic induced transparency (EIT) method.Then it's pointed out that the DSP storage time cannot be extended to classical level in free atomic gases with the lack of the correlations between the atoms.Finally,how the problem could be solved is discussed.
In the paper we consider a new approach for storage and cloning of quantum information by three level atomic (molecular) systems in the presence of the electromagnetically induced transparency (EIT) effect. For that, the various schemes of transformation into the bright and dark polaritons for quantum states of optical field in the medium are proposed. Physical conditions of realization of quantum nondemolition (QND) storage of quantum optical state are formulated for the first time. We have shown that the best storage and cloning of can be achieved with the atomic ensemble in the Bose-Einstein condensation state. We discuss stimulated Raman two-color photoassociation for experimental realization of the schemes under consideration.
In the paper we consider a new approach for storage and cloning of quantum information by three level atomic (molecular) systems in the presence of the electromagnetically induced transparency (EIT) effect. For that, the various schemes of transformation into the bright and dark polaritons for quantum states of optical field in the medium are proposed. Physical conditions of realization of quantum nondemolition (QND) storage of quantum optical state are formulated for the first time. We have shown that the best storage and cloning of can be achieved with the atomic ensemble in the Bose-Einstein condensation state. We discuss stimulated Raman two-color photoassociation for experimental realization of the schemes under consideration.
Atomic coherence is the result of interaction between light and materials,which leads to many important physical phenomenon.Currently,most experimental researches on atomic coherence are reported in atomic gases.Compared with atomic gases,the related experimental researches in solid materials have more practical applications.This paper introduces the recent research progress of atomic coherence in solid-state materials in detail,including the Electromagnetically Induced Transparency(EIT) in solid materials,light velocity reduction and coherent storage,controllable eraser of optical storage information,all-optical route based on optical storage,optical velocity reduction and reversible storage of double light pulses and enhanced four-wave mixing based on atomic coherence,it also discusses its application to relative fields.
We study the influence of a lossless material medium on the coherent storage and quantum-state transfer of a quantized probe light in an ensemble of $\ensuremath{\Lambda}$-type atoms. The medium is modeled as uniformly distributed two-level atoms with the same energy level spacing, coupling to a probe light. This coupled system can be simplified to a collection of two-mode polaritons which couple to one transition of the $\ensuremath{\Lambda}$-type atoms. We show that, when the other transition of $\ensuremath{\Lambda}$-type atoms is controlled by a classical light, electromagnetically induced transparency can also occur for the polaritons. In this case the coherent storage and quantum transfer for photon states are achievable through novel dark states with respect to the polaritons. By calculating the corresponding dispersion relation, we find that the ensemble of three-level atoms with $\ensuremath{\Lambda}$-type transitions may serve as quantum memory for it slows or even stops light propagation through the mechanism of electromagnetically induced transparency.
Electromagnetically induced transparency (EIT) techniques are important tools for the storage of the quantum states of light fields in atomic ensembles and for enhancement of the interaction between photons. In this paper, we briefly summarize the recent experimental studies conducted by our group on enhanced cross-phase modulation based on double EIT effects, the quantum interference of stored dual-channel spin-wave excitations and the coherent manipulation of the spin wave vector for the polarization of photons in a single tripod atomic system. The work presented here has potential application in the developing field of quantum information processing.
We study in detail the interesting dynamical symmetry and its applications in various atomic systems with electromagnetically induced transparency (EIT) in this paper. By discovering the symmetrical Lie group of various atomic systems, such as single-atomic-ensemble composed of complex mmm-level (m>3)(m>3)(m>3) atoms, and twotwotwo-atomic-ensemble and even multi-atomic-ensemble system composed of of threethreethree-level atoms etc., one can obtain the general definition of dark-state polaritons (DSPs), and then the dark-states of these different systems. The symmetrical properties of the multi-level system and multi-atomic-ensemble system are shown to be dependent on some characteristic parameters of the EIT system. Furthermore, a controllable scheme to generate quantum entanglement between lights or atoms via quantized DSPs theory is discussed and the robustness of this scheme is analyzed by confirming the validity of adiabatic passage conditions in this paper.