Zobrazeno 1 - 10
of 545
pro vyhledávání: '"Shore B."'
Publikováno v:
Phys. Rev. A 74, 053402 (2006)
We describe situations in which chains of N degenerate quantum energy levels, coupled by time-dependent external fields, can be replaced by independent sets of chains of length N, N-1,...,2 and sets of uncoupled single states. The transformation is a
Externí odkaz:
http://arxiv.org/abs/1010.1235
Publikováno v:
Opt. Commun. 283 (2010) 1346
We present a method for achieving complete population transfer in a two-state quantum system via adiabatic time evolution in which, contrary to conventional rapid adiabatic passage produced by chirped pulses, there occurs no crossing of diabatic ener
Externí odkaz:
http://arxiv.org/abs/0910.4143
Publikováno v:
J.Phys.B 42, 055504 (2009).
Stimulated Raman adiabatic passage (STIRAP) is a well established technique for producing coherent population transfer in a three-state quantum system. We here exploit the resemblance between the Schrodinger equation for such a quantum system and the
Externí odkaz:
http://arxiv.org/abs/0812.0361
Publikováno v:
Journal of Modern Optics, 54, 2237-2257 (2007)
Manipulation of superpositions of discrete quantum states has a mathematical counterpart in the motion of a unit-length statevector in an N-dimensional Hilbert space. Any such statevector motion can be regarded as a succession of two-dimensional rota
Externí odkaz:
http://arxiv.org/abs/0802.4246
Population trapping occurs when a particular quantum-state superposition is immune to action by a specific interaction, such as the well-known dark state in a three-state lambda system. We here show that in a three-state loop linkage, a Hilbert-space
Externí odkaz:
http://arxiv.org/abs/0712.1238
Publikováno v:
Physical Review A 77, 063823 (6 pages) (2008)
We present a general scheme to determine the loss-free adiabatic eigensolutions (dark-state polaritons) of the interaction of multiple probe laser beams with a coherently driven atomic ensemble under conditions of electromagnetically induced transpar
Externí odkaz:
http://arxiv.org/abs/0712.0060
Publikováno v:
Phys. Rev. A 73, 043415 (2006)
We propose a technique to prepare coherent superpositions of two nondegenerate quantum states in a three-state ladder system, driven by two simultaneous fields near resonance with an intermediate state. The technique, of potential application to enha
Externí odkaz:
http://arxiv.org/abs/quant-ph/0601028
We present results from a study of the coherence properties of a system involving three discrete states coupled to each other by two-photon processes via a common continuum. This tripod linkage is an extension of the standard laser-induced continuum
Externí odkaz:
http://arxiv.org/abs/quant-ph/9909061
We propose a simple method for measuring the populations and the relative phase in a coherent superposition of two atomic states. The method is based on coupling the two states to a third common (excited) state by means of two laser pulses, and measu
Externí odkaz:
http://arxiv.org/abs/quant-ph/9906051
We present experimental and theoretical results of a detailed study of laser-induced continuum structures (LICS) in the photoionization continuum of helium out of the metastable state 2s $^1S_0$. The continuum dressing with a 1064 nm laser, couples t
Externí odkaz:
http://arxiv.org/abs/physics/9901017