منابع مشابه
Squeezing arguments
Many of our concepts are introduced to us via, and seem only to be constrained by, roughand-ready explanations and some sample paradigm positive and negative applications. This happens even in informal logic and mathematics. Yet in some cases, the concepts in question – although only informally and vaguely characterized – in fact have, or appear to have, entirely determinate extensions. Here’s ...
متن کاملRelations between bosonic quadrature squeezing and atomic spin squeezing
Xiaoguang Wang and Barry C. Sanders Department of Physics and Australian Centre of Excellence for Quantum Computer Technology, Macquarie University, Sydney, New South Wales 2109, Australia Department of Physics and Center for Nonlinear Studies, Hong Kong Baptist University, Hong Kong, China Quantum Information Science Group, Department of Physics and Astronomy, University of Calgary, Alberta, C...
متن کاملA Study of Entanglement and Squeezing of
We study entanglement and squeezing of a cluster of spin systems under the influence of the two-axis countertwisting Hamiltonian. The squeezing parameters given by Wineland et al and also by Kitagawa et al. are chosen as the criteria of spin squeezing. The criterion of pairwise entanglement is chosen to be the concurrence and that of the bipartite entanglement the linear entropy. We also define...
متن کاملOptimal estimation of squeezing
Squeezed states are characterized by a phasedependent redistribution of quantum fluctuations such that the dispersion in one of the two quadrature components of the field is reduced below the level set by the symmetric distribution of the vacuum state or a coherent state [1]. Such a property has been used to raise the sensitivity beyond the standard quantum limit [2, 3] and to enhance interfero...
متن کاملVacuum spin squeezing
We investigate the generation of entanglement (spin squeezing) in an optical-transition atomic clock through the coupling to an optical cavity in its vacuum state. We show that if each atom is prepared in a superposition of the ground state and a long-lived electronic excited state, and viewed as a spin-1/2 system, then the collective vacuum light shift entangles the atoms, resulting in a squee...
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ژورنال
عنوان ژورنال: Science
سال: 2009
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.325_1601c