Propagation of laser pulses and coherent population transfer in dissipative three-level systems: An adiabatic dressed-state picture

Fleischhauer, Michael; Manka, Aaron S.

doi:10.1103/physreva.54.794

Cited by 137 publications

(100 citation statements)

References 37 publications

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“…This will be the case provided the probe field is turned on and off adiabatically as compared with |B − |D energy splitting, which is equal to the Stark shift ∆ S =Ω 2 /∆ of |B . In the limit Ω c ≫ Ω, which we will assume from now on, the non-adiabatic coupling between |D and |B has an effective Rabi frequency Ω N A ∼ Ω/(T Ω c ) [19] giving population loss from the dark state into the bright state of order ρ B ∼ (Ω N A /∆ S ) 2 ∼ (Ω/Ω c ) 6 and hence an error of the same order. The errors due to the Stark shift Ω 2 N A /∆ S of |D and due to spontaneous emission are smaller than (Ω/Ω c ) 6 and γ/∆, respectively.…”

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confidence: 99%

Coherent Quantum Optical Control with Subwavelength Resolution

et al. 2008

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We suggest a new method for quantum optical control with nanoscale resolution. Our method allows for coherent far-field manipulation of individual quantum systems with spatial selectivity that is not limited by the wavelength of radiation and can, in principle, approach a few nanometers. The selectivity is enabled by the nonlinear atomic response, under the conditions of Electromagnetically Induced Transparency, to a control beam with intensity vanishing at a certain location. Practical performance of this technique and its potential applications to quantum information science with cold atoms, ions, and solid-state qubits are discussed.PACS numbers: 32.80. Qk, 42.50.Gy, 03.67.Lx Coherent optical fields provide a powerful tool for coherent manipulation of a wide variety of quantum systems. Examples range from optical pumping, cooling, and quantum control of isolated atoms [1, 2] and ions [3] to manipulation of individual electronic and nuclear spins in solid state [4,5]. However, diffraction sets a fraction of the optical wavelength λ as the fundamental limit to the size of the focal spot of light [6]. This prohibits high-fidelity addressing of individual identical atoms if they are separated by a distance of order λ or less. In this Letter, we propose a method for coherent optical far-field manipulation of quantum systems with resolution that is not limited by the wavelength of radiation and can, in principle, approach a few nanometers.Our method for coherent sub-wavelength manipulation is based on the nonlinear atomic response produced by so-called dark resonances [7]. The main idea can be understood using the three-state model atom shown in Fig.

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confidence: 99%

Coherent Quantum Optical Control with Subwavelength Resolution

et al. 2008

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“…(17), in order to have H 1 (t) 12 and H 1 (t) 23 identically zero, the super-adiabatic Hamiltonian of Eq. (12) for the Ladder system becomes…”

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confidence: 99%

Three-level superadiabatic quantum driving

2014

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The superadiabatic quantum driving, producing a perfect adiabatic transfer on a given Hamitonian by introducing an additional Hamiltonian, is theoretically analysed for transfers within a three-level system. Our starting point is the stimulated Raman adiabatic passage, realized through different schemes of laser pulses. We determine the superadiabatic correction for each scheme. The fidelity, robustness and transfer time of all the superadiabatic transfer schemes are discussed. We derive that all superadiabatic corrections are based on a π-(or near-π)-area pulse coupling between the initial and final states. The benefits in the protocol robustness overcome the difficulties associated to the actual implementation of the three-level superadiabatic transfer.

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“…The presence of the factor √ ηkL instead of unity in (12), where α = ηkL is the opacity of the medium in the absence of EIT, is due to the fact that propagation effects need to be taken into account [2,13,14].…”

Section: E(zt)mentioning

confidence: 99%

“…The second condition is well-known from adiabatic passage [13,18] and sets a limit to the rotation velocityθ of the mixing angle and hence to the deceleration/acceleration of the polariton. In order to stay in the adiabatic regime at all times the characteristic time scale T has to fulfill the condition…”

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confidence: 99%

“Stopping” of light and quantum memories for photons

Fleischhauer

2003

Coherence and Quantum Optics VIII

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Summary. -A coherent technique for the control of photon propagation in optically thick media and its application for quantum memories is discussed. Raman adiabatic passage with an externally controlled Stokes field can be used to transfer the quantum state of a light pulse ("flying" qubit) to a collective spin-excitation (stationary qubit) and thereby slow down its propagation velocity to zero. The process is reversible and has a potential fidelity of unity without the necessity for strongly coupling resonators. A simple quasi-particle picture (dark-state polariton) of the transfer is presented. The analytic theory is supplemented with exact numerical solutions. Finally the influence of decoherence mechanisms on collective storage states, which are N -particle entangled states, is analyzed.

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Propagation of laser pulses and coherent population transfer in dissipative three-level systems: An adiabatic dressed-state picture

Cited by 137 publications

References 37 publications

Coherent Quantum Optical Control with Subwavelength Resolution

Coherent Quantum Optical Control with Subwavelength Resolution

Three-level superadiabatic quantum driving

“Stopping” of light and quantum memories for photons

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