Quantum memory for light via a stimulated off-resonant Raman process: Beyond the three-level<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Λ</mml:mi></mml:mrow></mml:math>-scheme approximation

Sheremet, A. S.; Gerasimov, L. V.; Sokolov, I. M.; Kupriyanov, D. V.; Mishina, O. S.; Giacobino, E.; Laurat, Julien

doi:10.1103/physreva.82.033838

Cited by 29 publications

(20 citation statements)

References 26 publications

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“…We also notice that the results of Ref. [22] assuming negligible decoherence widths  ij may be of interest in developing quantum memory protocols [23], e.g., at the level of decisions about atomic schemes to be considered.…”

Section: Discussionmentioning

confidence: 99%

“…In essence, the five-level model developed here has been employed to investigate how the presence of a state, to which the coupling is allowed in the electric-dipole approximation though the probing is dipole-forbidden (such as with the 5P 3/2 (F′ = 1) state in Fig. 1), may influence a weak probe absorption under multilevel coupling [22,23]. The spectra have been simulated for different coupling-beam detunings Δ c , as well as for the Rabi frequencies  c varying in a considerably wide region.…”

Section: Discussionmentioning

confidence: 99%

“…For better understanding of these points, we refer the reader to our five-level calculations with the other parameter values chosen [21,22], the appropriate four-level calculations, our calculations with the state |3> neglected [21,22], and those performed in Ref. [23], which have been related to D1 line of 133 Cs. In the experimental spectrum, the A-T wings can be recognized.…”

Section: Comparison Of Numerical Solutions With Experimental Spectramentioning

confidence: 99%

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Electromagnetically induced transparency and Autler-Townes effect in a generalized L-system: A five-level model

Żaba¹,

Long²,

Głódź³

et al. 2013

Ukr. J. Phys. Opt.

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Abstract. We calculate electric susceptibility of a laser-dressed atomic medium. The model adopted in this work refers to the experiment with cold 85 Rb atoms, where the states F′ = 1, 2, 3 of the hyperfine manifold 5P 3/2 (F′) are strongly coupled with the ground state 5S 1/2 (F = 2), and the coupling is probed by a weak probing field from the other ground-state component 5S 1/2 (F = 3). We present a five-level model in which the states F = 2, 3 and F′ = 1, 2, 3 are taken into account, while the noncoupled state F′ = 4 is neglected. The model is used as a starting point to reproduce spectral features observed in the absorption of probe light passing through a cold sample of 85 Rb atoms in a magneto-optical trap. Basing on numerical solutions of this model, we have also studied in detail the impact on the probe spectra from the presence of the state F′ = 1 to which probing is forbidden by electric-dipole transition, but coupling is allowed [see, e.g., Proc. of SPIE 8770 (2013)

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Comparison Of Numerical Solutions With Experimental Spectramentioning

confidence: 99%

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Electromagnetically induced transparency and Autler-Townes effect in a generalized L-system: A five-level model

Żaba¹,

Long²,

Głódź³

et al. 2013

Ukr. J. Phys. Opt.

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“…The second one is the backward retrieval for which the read-out pulse has the opposite direction. Like for other memory schemes [18,[39][40][41][42], we will see that backward retrieval provides better read-out than forward retrieval for a single mode while it is not necessarily true for a multimode signal.…”

Section: Analysis Of the Read-out Processmentioning

confidence: 99%

High-speed spatially multimode atomic memory

et al. 2011

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We study the coherent storage and retrieval of a very short multimode light pulse in an atomic ensemble. We consider a quantum memory process based on the conversion of a signal pulse into a long-lived spin coherence via light matter interaction in an on-resonant Λ -type system. In order to study the writing and reading processes we analytically solve the partial differential equations describing the evolution of the field and of the atomic coherence in time as well as in space. We show how to optimize the process for writing as well as for reading. If the medium length is fixed, for each length, there is an optimal value of the pulse duration. We discuss the information capacity of this memory scheme and we estimate the number of transverse modes that can be stored as a quantum hologram.

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“…Quantum memory for light via stimulated off-resonant Raman process is considered in Ref. [32] beyond the three-level approximation. Choi and Elliott [33] propose, through numerical calculations, to use multilevel systems involving hyperfine structure in problems of localization of excitations via dark-state formation in EIT processes.…”

Section: Introductionmentioning

confidence: 99%

Pulse propagation, population transfer, and light storage in five-level media

et al. 2015

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We consider adiabatic interaction of five-level atomic systems and their media with four short laser pulses under the condition of all two-photon detunings being zero. We derive analytical expressions for eigenvalues of the system's Hamiltonian and determine conditions of adiabaticity for both the atom and the medium. We analyze, in detail, the system's behavior when the eigenvalue with nonvanishing energy is realized. As distinct from the usual dark state of a five-level system (corresponding to zero eigenvalue), which is a superposition of three states, in our case the superposition of four states does work. We demonstrate that this seemingly unfavorable case nevertheless completely imitates a three-level system not only for a single atom but also in the medium, since the propagation equations are also split into those for three-and two-level media separately. We show that, under certain conditions, all the coherent effects observed in three-level media, such as population transfer, light slowing, light storage, and so on, may efficiently be realized in five-level media. This has an important advantage that the light storage can be performed twice in the same medium; i.e., the second pulse can be stored without retrieving the first one, and then the two pulses can be retrieved in any desired sequence.

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Quantum memory for light via a stimulated off-resonant Raman process: Beyond the three-levelΛ-scheme approximation

Cited by 29 publications

References 26 publications

Electromagnetically induced transparency and Autler-Townes effect in a generalized L-system: A five-level model

Electromagnetically induced transparency and Autler-Townes effect in a generalized L-system: A five-level model

High-speed spatially multimode atomic memory

Pulse propagation, population transfer, and light storage in five-level media

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