Incorporating excitation-induced dephasing into the Maxwell–Bloch numerical modeling of photon echoes

Burr, Geoffrey W.; Harris, T. L.; Babbitt, W.R.; Jefferson, C. Michael

doi:10.1016/j.jlumin.2003.12.034

Cited by 6 publications

(5 citation statements)

References 41 publications

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“…The results are shown in figure 2 for various values of T and have been successfully compared with the ones obtained by solving numerically the Maxwell-Bloch equations [35]. They show that the efficiency increases as T decreases, as expected, and tends to…”

Section: Re-emission Processmentioning

confidence: 53%

High-bandwidth quantum memory protocol for storing single photons in rare-earth doped crystals

et al. 2013

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We present a detailed analysis of a high-bandwidth quantum memory protocol for storing single photons in a rare-earth-ion doped crystal. The basic idea is to benefit from a coherent free-induced decay type re-emission which occurs naturally when a photon with a broadband spectrum is absorbed by a narrow atomic transition in an optically dense ensemble. This allows for a high-bandwidth memory for realistic material parameters. Long storage time and on-demand readout are obtained by means of spin states in a lambda-type configuration, through the transfer of the optical coherence to a spin coherence (so-called spin-wave storage). We give explicit formulae and show numerical results which make it possible to gain insight into the dependence of the memory efficiency on the optical depth and on the width and the shape of stored photons. We present a feasibility study in rare-earth doped crystals and show that high efficiencies and high bandwidth can be obtained with realistic parameters. Highbandwidth memories using spin-wave storage offers the possibility of very high time-bandwidth products, which is important for experiments where high repetition rates are needed.

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Section: Re-emission Processmentioning

confidence: 53%

High-bandwidth quantum memory protocol for storing single photons in rare-earth doped crystals

et al. 2013

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“…This analysis is based on a simplified single-mode model that neglects the spatial overlap between the modes. We also performed numerical calculations of the control pulse efficiency by numerically solving the Bloch equations [50], which is also based on a spatial single-mode model, resulting in an efficiency of 0.91. The difference is probably due to the neglected transverse profile of the spatial modes and non-perfect overlap in the crossed beam configuration.…”

Section: Cavity-enhanced Spin-wave Afc Memorymentioning

confidence: 99%

Cavity-enhanced storage in an optical spin-wave memory

et al. 2014

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We report on the experimental demonstration of an optical spin-wave memory, based on the atomic frequency comb (AFC) scheme, where the storage efficiency is strongly enhanced by an optical cavity. The cavity is of low finesse, but operated in an impedance matching regime to achieve high absorption in our intrinsically low-absorbing Eu 3+ :Y 2 SiO 5 crystal. For storage of optical pulses as an optical excitation (AFC echoes), we reach efficiencies of 53% and 28% for 2 μs and 10 μs delays, respectively. For a complete AFC spin-wave memory we reach an efficiency of 12%, including spin-wave dephasing, which is a 12-fold increase with respect to previous results in this material. This result is an important step towards the goal of making efficient and long-lived quantum memories based on spin waves, in the context of quantum repeaters and quantum networks.

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“…Those experiments recall Herzog and Hahn's [24] double resonance NMR experiments that provided the initial foundation for understanding ISD phenomena. As the significance of ISD for optical signal processing became even more apparent, Burr et al [53] developed sophisticated numerical Maxwell-Bloch simulations that incorporated ISD to predict the effects on coherent transient phenomena and potential device performance. With the impact of ISD on applications in the field of quantum information science, the study and characterization of ISD continues to be essential to the development of new ultra-low decoherence materials.…”

Section: Instantaneous Spectral Diffusion (Isd)mentioning

confidence: 99%

Measuring and analyzing excitation-induced decoherence in rare-earth-doped optical materials

et al. 2014

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A method is introduced for quantitatively analyzing photon echo decay measurements to characterize excitation-induced decoherence resulting from the phenomenon of instantaneous spectral diffusion. Detailed analysis is presented that allows fundamental material properties to be extracted that predict and describe excitation-induced decoherence for a broad range of measurements, applications and experimental conditions. Motivated by the need for a method that enables systematic studies of ultra-low decoherence systems and direct comparison of properties between optical materials, this approach employs simple techniques and analytical expressions that avoid the need for difficult to measure and often unknown material parameters or numerical simulations. This measurement and analysis approach is demonstrated for the 3 H 6 to 3 H 4 optical transition of three thulium-doped crystals, Tm 3+ :YAG, Tm 3+ :LiNbO 3 and Tm 3+ :YGG, that are currently employed in quantum information and classical signal processing demonstrations where minimizing decoherence is essential to achieve high efficiencies and large signal bandwidths. These new results reveal more than two orders of magnitude variation in sensitivity to excitation-induced decoherence among the materials studied and establish that the Tm 3+ :YGG system offers the longest optical coherence lifetimes and the lowest levels of excitation-induced decoherence yet observed for any known thulium-doped material.

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Incorporating excitation-induced dephasing into the Maxwell–Bloch numerical modeling of photon echoes

Cited by 6 publications

References 41 publications

High-bandwidth quantum memory protocol for storing single photons in rare-earth doped crystals

High-bandwidth quantum memory protocol for storing single photons in rare-earth doped crystals

Cavity-enhanced storage in an optical spin-wave memory

Measuring and analyzing excitation-induced decoherence in rare-earth-doped optical materials

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