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

arXiv:quant-ph/0407188 · Optics and Spectroscopy

Quantum theory of a polarization phase gate in an atomic tripod configuration

S. Rebić, D. Vitali, Carlo Ottaviani, P. Tombesi, M. Artoni, F. Cataliotti, R. Corbalán

Published Aug 1, 2005• 1 citation
arXivHTMLPDF

Abstract

We present the quantum theory of a polarization phase gate that can be realized in a sample of ultracold rubidium atoms driven into a tripod configuration. The main advantages of this scheme are its relative simplicity and inherent symmetry. It is shown that conditional phase shifts of order π can be attained.
DOI
10.1134/1.2034613

Related papers

Quantum theory of a polarization phase gate in an atomic tripod configuration

S. Rebić, Vitali, D, Carlo Ottaviani +4 more

We present the quantum theory of a polarization phase-gate that can be realized in a sample of ultracold rubidium atoms driven into a tripod configuration. The main advantages of this scheme are in its relative simplicity and inherent symmetry. It is shown that the conditional phase shifts of order $\\pi$ can be attained.

•Jan 1, 2004•1 citation

Polarization phase gate with a tripod atomic system

S. Rebić, David Vitali, Carlo Ottaviani +4 more

We analyze the nonlinear optical response of a four-level atomic system driven into a tripod configuration. The large cross-Kerr nonlinearities that occur in such a system are shown to produce nonlinear phase shifts of order $\ensuremath{\pi}$. Such a substantial shift may be observed in a cold atomic gas in a magneto-optical trap where it could be feasibly exploited towards the realization of a polarization quantum phase gate. The experimental feasibility of such a gate is here examined in detail.

arXiv:quant-ph/0310148•Physical Review A•Sep 21, 2004•185 citations

A PROPOSAL FOR AN OPTICAL IMPLEMENTATION OF A UNIVERSAL QUANTUM PHASE GATE

S. Rebić, David Vitali, Carlo Ottaviani +4 more

Large optical nonlinearities occurring in a coherently prepared atomic system are shown to produce phase shifts of order π. Such an effect may be observed in ultracold rubidium atoms where it could be feasibly exploited toward the realization of a polarization phase gate.

International Journal of Quantum Information•Dec 17, 2004•0 citations

Polarization Qubit Phase Gate in Driven Atomic Media

Carlo Ottaviani, David Vitali, M. Artoni +2 more

We present here an all-optical scheme for the experimental realization of a quantum phase gate. It is based on the polarization degree of freedom of two traveling single-photon wave packets and exploits giant Kerr nonlinearities that can be attained in coherently driven ultracold atomic media.

arXiv:quant-ph/0302070•Physical Review Letters•May 15, 2003•200 citations

A Proposal for an Optical Implementation of an Universal Quantum Phase Gate

S. Rebić, David Vitali, Carlo Ottaviani +4 more

Large optical nonlinearities occurring in a coherently prepared atomic system are shown to produce phase shifts of order $π$. Such an effect may be observed in ultracold rubidium atoms where it could be feasibly exploited toward the realization of a polarization phase gate.

arXiv:quant-ph/0407190•Jul 23, 2004•0 citations

Fifth-order nonlinearity and 3-qubit phase gate in a five-level tripod atomic system

Fuli Li, Ying Gu, Lijun Wang +1 more

We first investigate the nonlinear optical response of a five-level tripod atomic system in electromagnetically induced transparency and then propose a 3-qubit phase gate protocol based on the fifth-order nonlinearity. The cross-phase modulation among the three weak fields induced by the fifth-order nonlinearity in electromagnetically induced transparency can produce the phase shift of order π, which can be used to realize the 3-qubit polarization phase gate. This protocol should have potential applications in quantum information processing.

Journal of the Optical Society of America B•Mar 20, 2008•8 citations
We present the quantum theory of a polarization phase-gate that can be realized in a sample of ultracold rubidium atoms driven into a tripod configuration. The main advantages of this scheme are in its relative simplicity and inherent symmetry. It is shown that the conditional phase shifts of order pi\\pipi can be attained.
We analyze the nonlinear optical response of a four-level atomic system driven into a tripod configuration. The large cross-Kerr nonlinearities that occur in such a system are shown to produce nonlinear phase shifts of order $\ensuremath{\pi}$. Such a substantial shift may be observed in a cold atomic gas in a magneto-optical trap where it could be feasibly exploited towards the realization of a polarization quantum phase gate. The experimental feasibility of such a gate is here examined in detail.
Large optical nonlinearities occurring in a coherently prepared atomic system are shown to produce phase shifts of order πππ. Such an effect may be observed in ultracold rubidium atoms where it could be feasibly exploited toward the realization of a polarization phase gate.
We first investigate the nonlinear optical response of a five-level tripod atomic system in electromagnetically induced transparency and then propose a 3-qubit phase gate protocol based on the fifth-order nonlinearity. The cross-phase modulation among the three weak fields induced by the fifth-order nonlinearity in electromagnetically induced transparency can produce the phase shift of order π, which can be used to realize the 3-qubit polarization phase gate. This protocol should have potential applications in quantum information processing.