Open AccessPosted Content
Generation of dipole squeezing in a two-mode system with entangled coherent states of a quantized electromagnetic field
Rui-Hua Xie,Qin Rao +1 more
TLDR
In this paper, the effects of detuning, Stark shift and atomic coherence on atomic dipole squeezing (ADS) were investigated in a two-mode system that consists of a twolevel atom interacting with a twomode quantized electromagnetic field, which is initially prepared in an entangled twomode coherent state via a nondegenerate two-photon process in a lossless cavity.Abstract:
Two-mode quantized electromagnetic fields can be entangled and admit a large number of coherent states. In this paper, we consider a two-mode system that consists of a two-level atom interacting with a two-mode quantized electromagnetic field, which is initially prepared in an entangled two-mode coherent state, via a nondegenerate two-photon process in a lossless cavity. We study the quantum fluctuations in the two-mode system and investigate in detail the effects of detuning, Stark shift and atomic coherence on atomic dipole squeezing (ADS). We show that ADS strongly depends on the atomic coherence. It is found that the stronger the correlations between the two modes are involved, the more the ADS could be generated. The detuning or Stark shift has a destructive effect on ADS, but the combined effect of the detuning and Stark shift may lead to a regular, periodical and strong ADS pattern.read more
Citations
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Algebraic treatment of some systems with spin-like interactions with applications in quantum optics and vibronic spectroscopy
TL;DR: In this paper, a unified scheme based on algebraic techniques is proposed to solve the eigenvalue equation for a class of systems involving spin-like interactions, which are built from selected elements in the enveloping algebra of the harmonic oscillator, su(2) and su(1, 1) algebras.
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Generalized Coherent States for Quantized Electromagnetic Fields in Time-varying Linear Media
TL;DR: In this paper, the generalized coherent state, i.e., Gaussian-Klauder state, of electromagnetic flelds conflned inside a cavity fllled with a nontrivial conductive medium is investigated.
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Field and dipole squeezing in a driven degenerate Λ quantum-beat system
TL;DR: In this article, the properties of field squeezing and atomic dipole squeezing in a coherent-microwave field driven degenerate Λ quantum-beat system were theoretically investigated, and it was shown that the driving microwave may enhance or suppress both dipole and cavity-field squeezing, depending on the atomic energy level splitting and the microwave Rabi frequency.
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Atomic dipole squeezing in the degenerate λ quantum beat three-level system
Qing-Chun Zhou,Shi Ning Zhu +1 more
TL;DR: In this article, the authors investigated the time evolution of the atomic dipole squeezing parameters of a Λ-type three-level atom interacting with a single-mode coherent optical field.
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Photon higher-order squeezing effects of the q analogue of a single-mode field interacting with a Ξ-type three-level atom
TL;DR: The nonlinear theory of interaction between the q analogue of a single-mode field and a Ξ-type three-level atom has been established in this paper, and the formal solution of the Schrodinger equation in the representation and its average number are obtained.
References
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TL;DR: The set of states accessible from an initial EPR state by one-particle operations are characterized and it is shown that in a sense they allow two bits to be encoded reliably in one spin-1/2 particle.
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Quantum Mechanics Helps in Searching for a Needle in a Haystack
TL;DR: In this article, a phone directory containing $N$ names arranged in completely random order is presented, and the desired phone number can be obtained in only O(sqrt{N})$ accesses to the database.
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Akira Furusawa,J. L. Sørensen,Samuel L. Braunstein,Christopher A. Fuchs,H. J. Kimble,Eugene S. Polzik +5 more
TL;DR: The first realization of unconditional quantum teleportation where every state entering the device is actually teleported is realized, using squeezed-state entanglement.
Posted Content
Coherent states for arbitrary Lie group
TL;DR: In this article, the concept of coherent states originally closely related to the nilpotent group of Weyl is generalized to arbitrary Lie groups and its features are investigated for the simplest Lie groups.
Journal ArticleDOI
Quantum cryptography with entangled photons
TL;DR: A novel key distribution scheme is implemented using Wigner's inequality to test the security of the quantum channel, and a variant of the BB84 protocol is realized.
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