Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Applied Mechanics and Materials

Creation of Coherent Superposition State by Stimulated Raman Adiabatic Passage in Serial Multi-Λ-Type System

Xiao Qin Shu, Chi Deng, Ye Kuang, Jian Yang, Yi Ding Liu

Published Jun 1, 2014• 0 citations
Publisher

Abstract

We propose a scheme for creating coherent atomic superposition states via the technique of stimulated Raman adiabatic passage (STIRAP) in a Λ-type system where final states are composed of manifold of levels and the intermediate levels could be more than one level. If the pump pulses and Stokes pulses are kept in the same order of ordinary STIRAP, through the control the delay time between the Stokes pulses and pump pulse, we could create arbitrary superposition states in the manifold of levels.

DOI
10.4028/www.scientific.net/amm.575.598

Related papers

Creation of coherent superposition state in serial multi-Λ-type system by fraction-STIRAP

Qi Li

A technique for creation of coherent superposition state of initial populated state and final state in serial multi-Λ system is proposed.It is based on an extension of the technique of fractional stimulated Raman adiabatic passage(f-STIRAP).But unlike the f-STIRAP,a new pulse sequence has been proposed,in which each Stoke laser precedes the corresponding pump laser by τ,and the first of Stokes pulses and the last of pump pulses should vanish simultaneously after all the intermediate pulses,which vanish simultaneously too.Furthermore,we provide numerical simulation of the robustness against variations in the pulse delay,and the detuning.In order to create desired superposition state,we must not only keep two-photon resonance,but also keep single-photon resonance.

Journal of Atomic and Molecular Physics•Jan 1, 2008•0 citations

Preparing of coherent superposition state in serial multi-\Lambda-type system by stimulated Raman adiabatic passage

李奇芳 Qifang Li, Ye Kuang

A scheme for creating an arbitrary coherent superposition of two atomic states in serial multi-Λ-type system is proposed.This technique with the application of a control field is based on the existence of two degenerate dark states and their interaction.The mixing of the dark states can be controlled by changing the relative delay time of the control pulse.One can get any desired superposition by changing the delay time of the control pulse.

Chinese Optics Letters•Jan 1, 2008•0 citations

Creation of atomic coherent superposition states via the technique of stimulated Raman adiabatic passage using a Λ -type system with a manifold of levels

Yueping Niu, Shangqing Gong, Ruxin Li +1 more

We propose a scheme for creating atomic coherent superposition states via the technique of stimulated Raman adiabatic passage in a $\ensuremath{\Lambda}$-type system where the final state has twofold levels. With the application of a control field, it is found that the presence of double dark states leads to two arbitrary coherent superposition states with equal amplitude but inverse relative phases, even though the condition of multiphoton resonance is not met. In particular, two orthogonal maximal coherent superposition states are created when the control field is resonant with the transition of the twofold levels. This scheme can also be extended to manifold $\ensuremath{\Lambda}$-type systems.

Physical Review A•Aug 13, 2004•34 citations

Preparing of coherent superposition state in serial multi-∧-type system by stimulated Raman adiabatic passage

李奇芳, 旷冶

A scheme for creating an arbitrary coherent superposition of two atomic states in serial multi-(?)-type system is proposed.This technique with the application of a control field is based on the existence of two degenerate dark states and their interaction.The mixing of the dark states can be controlled by changing the relative delay time of the control pulse.One can get any desired superposition by changing the delay time of the control pulse.

Chinese Optics Letters•Jan 1, 2008•0 citations

Creation of coherent atomic superpositions by fractional stimulated Raman adiabatic passage

Nikolay V. Vitanov, Kalle‐Antti Suominen, Bruce W. Shore

We discuss the properties of a simple and robust scheme for preparing atoms and molecules in an arbitrary preselected coherent superposition of quantum states - fractional stimulated Raman adiabatic passage (fractional STIRAP) - first proposed by Marte et al (1991 Phys. Rev. A 44 R4118). As in STIRAP, the Stokes pulse arrives before the pump pulse, but unlike STIRAP, here the two pulses terminate simultaneously, while maintaining a constant ratio of amplitudes. We extend earlier research and suggest a realization of this scheme with two smoothly varying delayed laser pulses (which can be derived from a single laser), the parameters of the created superposition being controlled by the polarization of the delayed pulse. Furthermore, we provide simple analytic estimates of the robustness of this process against variations in the laser intensity, laser frequency and pulse delay. Finally, we discuss an extension to multistate systems which provides a possibility for creating coherent superpositions of more than two states.

Journal of Physics B Atomic Molecular and Optical Physics•Sep 13, 1999•232 citations

Creation of atomic coherent superpositions in manifolds of levels without multi-photon resonance

Yueping Niu, Shangqing Gong, Ruxin Li +1 more

We propose a scheme for creating atomic coherent superpositions via stimulated Raman adiabatic passage in a Lambda-type system where the final state has twofold levels. In the employ of a control field, the presence of double dark states leads to two arbitrary coherent superposition states with equal amplitude but inverse relative phase without the condition of multi-photon resonance. In particular, two orthogonal maximal coherent superposition states are created when the control field is resonant with the transition of the twofold levels. This scheme can also be extended to manifold Lambda-type systems.

arXiv:quant-ph/0401028•Jan 7, 2004•0 citations
We propose a scheme for creating coherent atomic superposition states via the technique of stimulated Raman adiabatic passage (STIRAP) in a Λ-type system where final states are composed of manifold of levels and the intermediate levels could be more than one level. If the pump pulses and Stokes pulses are kept in the same order of ordinary STIRAP, through the control the delay time between the Stokes pulses and pump pulse, we could create arbitrary superposition states in the manifold of levels.
A technique for creation of coherent superposition state of initial populated state and final state in serial multi-Λ system is proposed.It is based on an extension of the technique of fractional stimulated Raman adiabatic passage(f-STIRAP).But unlike the f-STIRAP,a new pulse sequence has been proposed,in which each Stoke laser precedes the corresponding pump laser by τ,and the first of Stokes pulses and the last of pump pulses should vanish simultaneously after all the intermediate pulses,which vanish simultaneously too.Furthermore,we provide numerical simulation of the robustness against variations in the pulse delay,and the detuning.In order to create desired superposition state,we must not only keep two-photon resonance,but also keep single-photon resonance.
We propose a scheme for creating atomic coherent superposition states via the technique of stimulated Raman adiabatic passage in a $\ensuremath{\Lambda}$-type system where the final state has twofold levels. With the application of a control field, it is found that the presence of double dark states leads to two arbitrary coherent superposition states with equal amplitude but inverse relative phases, even though the condition of multiphoton resonance is not met. In particular, two orthogonal maximal coherent superposition states are created when the control field is resonant with the transition of the twofold levels. This scheme can also be extended to manifold $\ensuremath{\Lambda}$-type systems.
We discuss the properties of a simple and robust scheme for preparing atoms and molecules in an arbitrary preselected coherent superposition of quantum states - fractional stimulated Raman adiabatic passage (fractional STIRAP) - first proposed by Marte et al (1991 Phys. Rev. A 44 R4118). As in STIRAP, the Stokes pulse arrives before the pump pulse, but unlike STIRAP, here the two pulses terminate simultaneously, while maintaining a constant ratio of amplitudes. We extend earlier research and suggest a realization of this scheme with two smoothly varying delayed laser pulses (which can be derived from a single laser), the parameters of the created superposition being controlled by the polarization of the delayed pulse. Furthermore, we provide simple analytic estimates of the robustness of this process against variations in the laser intensity, laser frequency and pulse delay. Finally, we discuss an extension to multistate systems which provides a possibility for creating coherent superpositions of more than two states.
We propose a scheme for creating atomic coherent superpositions via stimulated Raman adiabatic passage in a Lambda-type system where the final state has twofold levels. In the employ of a control field, the presence of double dark states leads to two arbitrary coherent superposition states with equal amplitude but inverse relative phase without the condition of multi-photon resonance. In particular, two orthogonal maximal coherent superposition states are created when the control field is resonant with the transition of the twofold levels. This scheme can also be extended to manifold Lambda-type systems.