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Published byJeremy O’Neal’ Modified over 2 years ago

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CPT EIT LWI

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|2> |1> |3>

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CPT Suppose then solving Schrodinger Equation What if we’re sneaky and choose Such that c 1 (t)=0. Then we are trapped in the two lower states. Population Trapping

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CPT In fact So Is an eigenstate of the interaction Hamiltonian Dark States

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CPT Coherent Population Dark State density matrix at t=0 Incoherent mixture density matrix at t=0 Rabi OscillationsTrapped in dark state

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EIT |2> |1> |3> weak strong

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EIT Re[n]-1 Im[n]

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EIT quant-ph/0204173

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LWI We can completely eliminate absorption, can we do better? |2> |1> |3> The idea: Pump atoms into dark state, then emission from |1> can exceed absorption from ground states.

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BIB Quantum Optics, Scully and Zubairy,Cambridge University press 1997 Resolving conundrums in lasing without inversion via exact solutions to simple models, Scully, Quantum Opt. 6 p 203, 1994 Slow, Ultraslow, stored, and Frozen Light, Matsko,et. al., Adv.Atm.Mol.Opt.Phys. 47, p191 2001 Electromagnetically Induced Transparency, Harris, Physics Today, July 1997, p36

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