Dephasing-Rephasing Balancing in Photon Echoes by Excitation Induced Frequency Shifts

Rare-earth-doped materials for applications in quantum information storage and signal processing

“…Stark effects have been reviewed by Macfarlane [38] and are expected to play important roles in quantum memories. Decoherence due to changes in the local environment by optical excitation of neighboring ions, an effect termed instantaneous spectral diffusion (ISD), provides an additional contribution to G h and can be minimized by using low optical excitation densities or low ion concentrations [21,[39][40][41][42][43][44][45][46][47][48].…”

Dephasing Relaxation of the Electron Spin Echo of the Vibronic Cu(H2O)6 Complexes in Tutton Salt Crystals at Low Temperatures

“…[5] and [7] and the resulting rigid lattice phase memory rate 1/T 0 M = m 1/2 for Tutton salt crystals using calculated concentrations of protons and deuterons c n = (number of nuclei in crystal unit cells/unit cell volume). The results are summarized in Table 2.…”

“…Another approach was proposed by the Novosibirsk group (2,3) for spin dephasing in solids produced by fluctuating local magnetic fields and described by various model dynamical processes. Both approaches are still being developed but the main theoretical interest is currently shifted to the vibrational and electronic dynamics studied in vibrational echo (4) and optical photon echo (5,6) experiments, where the old ideas from magnetic resonance found new formulations.…”

Photon‐echo quantum memory in solid state systems

“…Furthermore, when RE ions are optically excited their interactions with neighbors change, introducing frequency shifts resulting in instantaneous spectral diffusion; the term excitationinduced frequency shifts is also applied [136,[144][145][146][147][148][149][150][151][152][153]. This line broadening mechanism is not familiar from other areas of optical physics.…”