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

The European Physical Journal Plus

Enhanced Kerr nonlinearity with nonlinear amplification based biexciton coherence

Seyyed Hossein Asadpour, HAMID RAHIMPOUR SOLEIMANI

Published Jan 1, 2015• 2 citations
Publisher
DOI
10.1140/epjp/i2015-15018-4

Related papers

Enhancement of Kerr nonlinearity via spontaneously generated coherence in a four-level N-type atomic system

Wen-juan Jiang, Xiang-an Yan, Jianping Song +4 more

Optics Communications•Oct 2, 2008•42 citations

Enhanced Kerr nonlinearity via quantum interference from spontaneous emission

Seyyed Hossein Asadpour, Mostafa Sahrai, A. Soltani +1 more

Physics Letters A•Nov 18, 2011•61 citations

Nonlinear Dynamics of Coherent Parametric Amplification in Multipartite two-level System under Intrinsic Decoherence

Muhammad Ibrahim

In this work, we study the dynamics of global quantum discord and quantum Fisher information in a multipartite system of two-level atoms interacting with a coherent field. The model includes parametric amplification, Kerr-type nonlinearity, and intrinsic decoherence to examine how these effects control quantum correlations and parameter-estimation sensitivity. The results show that, without intrinsic decoherence, both quantities exhibit rapid oscillations with clear collapse and revival behavior. Strong Kerr nonlinearity and strong parametric amplification enhance global quantum discord, while quantum Fisher information becomes maximum under a suitable balance of Kerr nonlinearity and amplification strength. Increasing the number of atoms generally strengthens global quantum discord but does not always improve quantum Fisher information. Intrinsic decoherence damps the oscillations and drives the system toward steady-state behavior.

quant-pharXiv:2606.25860•Jun 25, 2026•0 citations

Quantum circuits for amplification of Kerr nonlinearity via quadrature squeezing

Monika Bartkowiak, Lian-Ao Wu, Adam Miranowicz

Phase shifts induced by the Kerr effect are usually very small at the single-photon level. We propose two circuits for enhancing the cross-Kerr phase shift by applying one- and two-mode quadrature squeezing operators. Our results are based on the vector coherent state theory and can be implemented by physical operations satisfying the commutation relations for generators of the generalized special unitary group, SU(1,1). While the proposed methods could be useful for the realization of quantum optical entangling gates based on Kerr nonlinear media at the single-photon level, they also indicate a general alternative approach to enhance higher-order nonlinearities by applying lower-order nonlinear effects.

arXiv:1210.2384•Journal of Physics B Atomic Molecular and Optical Physics•Jul 4, 2014•35 citations

Enhancement of Kerr nonlinearity completely without absorption

Liang Hong, Yueping Niu, Li Deng +1 more

Physics Letters A•Oct 26, 2017•18 citations

Polarization phase gate and three-photon GHZ state using coherently enhanced Kerr nonlinearity

Nuo Ba, Ren-Gang Wan, Bo-Nan Jiang +4 more

Optics Communications•Nov 29, 2009•5 citations
In this work, we study the dynamics of global quantum discord and quantum Fisher information in a multipartite system of two-level atoms interacting with a coherent field. The model includes parametric amplification, Kerr-type nonlinearity, and intrinsic decoherence to examine how these effects control quantum correlations and parameter-estimation sensitivity. The results show that, without intrinsic decoherence, both quantities exhibit rapid oscillations with clear collapse and revival behavior. Strong Kerr nonlinearity and strong parametric amplification enhance global quantum discord, while quantum Fisher information becomes maximum under a suitable balance of Kerr nonlinearity and amplification strength. Increasing the number of atoms generally strengthens global quantum discord but does not always improve quantum Fisher information. Intrinsic decoherence damps the oscillations and drives the system toward steady-state behavior.
Phase shifts induced by the Kerr effect are usually very small at the single-photon level. We propose two circuits for enhancing the cross-Kerr phase shift by applying one- and two-mode quadrature squeezing operators. Our results are based on the vector coherent state theory and can be implemented by physical operations satisfying the commutation relations for generators of the generalized special unitary group, SU(1,1). While the proposed methods could be useful for the realization of quantum optical entangling gates based on Kerr nonlinear media at the single-photon level, they also indicate a general alternative approach to enhance higher-order nonlinearities by applying lower-order nonlinear effects.