Journal ArticleDOI
Giant Kerr nonlinearities obtained by electromagnetically induced transparency.
Holger Schmidt,Atac Imamoglu +1 more
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A cross-phase modulation scheme that exhibits a giant, resonantly enhanced nonlinearity, along with vanishing linear susceptibilities, is analyzed and has possible applications in quantum nondemolition measurements and for quantum logic gates.Abstract:
We analyze a cross-phase modulation (XPM) scheme that exhibits a giant, resonantly enhanced nonlinearity, along with vanishing linear susceptibilities The proposed atomic system uses an electromagnetically induced transparency and is limited only by two-photon absorption We predict dramatic improvement by several orders of magnitude for conditional phase shifts in XPM, and the system has possible applications in quantum nondemolition measurements and for quantum logic gatesread more
Citations
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Journal ArticleDOI
Electromagnetically induced transparency : Optics in coherent media
TL;DR: In this paper, the authors consider the atomic dynamics and the optical response of the medium to a continuous-wave laser and show how coherently prepared media can be used to improve frequency conversion in nonlinear optical mixing experiments.
Journal ArticleDOI
Light speed reduction to 17 metres per second in an ultracold atomic gas
Lene Vestergaard Hau,Lene Vestergaard Hau,Stephen E. Harris,Zachary Dutton,Zachary Dutton,Cyrus H. Behroozi,Cyrus H. Behroozi +6 more
TL;DR: In this paper, an experimental demonstration of electromagnetically induced transparency in an ultracold gas of sodium atoms, in which the optical pulses propagate at twenty million times slower than the speed of light in a vacuum, is presented.
Journal ArticleDOI
Electromagnetically Induced Transparency
TL;DR: Electromagnetic induced transparency is a technique for eliminating the effect of a medium on a propagating beam of electromagnetic radiation EIT may also be used, but under more limited conditions, to eliminate optical self-focusing and defocusing and to improve the transmission of laser beams through inhomogeneous refracting gases and metal vapors, as figure 1 illustrates.
Journal ArticleDOI
Linear optical quantum computing with photonic qubits
Pieter Kok,William J. Munro,Kae Nemoto,Timothy C. Ralph,Jonathan P. Dowling,Gerard J. Milburn +5 more
TL;DR: In this article, the authors reviewed the original theory and its improvements, and a few examples of experimental two-qubit gates are given, and the use of realistic components, the errors they induce in the computation, and how these errors can be corrected is discussed.
Journal ArticleDOI
Quantum Computing
Thaddeus D. Ladd,Fedor Jelezko,Raymond Laflamme,Yasunobu Nakamura,Christopher Monroe,Jeremy L. O'Brien +5 more
TL;DR: A number of physical systems, spanning much of modern physics, are being developed for this task, ranging from single particles of light to superconducting circuits, and it is not yet clear which, if any, will ultimately prove successful as discussed by the authors.
References
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Journal ArticleDOI
Nonlinear optical processes using electromagnetically induced transparency
TL;DR: In this paper, a strong coupling field between a metastable state and the upper state of an allowed transition to ground was proposed to obtain a resonantly enhanced third-order susceptibility while at the same time inducing transparency of the media.
Proceedings Article
Nonlinear-optical processes using electromagnetically induced transparency
TL;DR: It is shown that by applying a strong-coupling field between a metastable state and the upper state of an allowed transition to ground one may obtain a resonantly enhanced third-order susceptibility while at the same time inducing transparency of the media.
Journal ArticleDOI
Measurement of conditional phase shifts for quantum logic.
TL;DR: Measurements of the birefringence of a single atom strongly coupled to a high-finesse optical resonator are reported, with nonlinear phase shifts observed for an intracavity photon number much less than one.
Journal ArticleDOI
Efficient low-intensity optical phase conjugation based on coherent population trapping in sodium.
TL;DR: A theoretical model is presented that supports observations of optical phase-conjugate gain in sodium vapor by showing that coherent population trapping can write large-amplitude nonlinear-optical gratings at laser intensities well below those needed to saturate the optical transitions.
Journal ArticleDOI
Lasers without inversion: interference of dressed lifetime-broadened states.
Atac Imamoglu,Stephen E. Harris +1 more
TL;DR: The use of a coupling electromagnetic field is described to provide a general method of producing inversion-free laser systems and the interference between dressed states produces a zero in absorption while allowing gains of the order of that of the uncoupled system.