منابع مشابه
Measuring a coherent superposition
Atoms and molecules prepared in well-defined coherent superpositions of energy states exhibit many interesting properties, such as dark resonances [1], subrecoil laser cooling [2–5], electromagnetically induced transparency [6–8], radiation amplification without population inversion [9–12], refractive index enhancement without absorption [13], and enhanced harmonic generation [14,15]. Coherent ...
متن کاملAn Entanglement Study of Superposition of Qutrit Spin-Coherent States
Considering generalized concurrence as the criterion of entanglement, we study entanglement properties of superposition of two qutrit coherent states, as a function of their amplitudes. These states may attain maximum entanglement or no entanglement at all, depending on the choice of the parameters involved. The states revealing maximum entanglement also display the maximum violations of the Be...
متن کاملCoherent Product Superposition for Downlink Multiuser MIMO
In a two-user broadcast channel where one user has full CSIR and the other has none, a recent result showed that TDMA is strictly suboptimal and a product superposition requiring non-coherent signaling achieves DoF gains under many antenna configurations. This work introduces product superposition in the domain of coherent signaling with pilots, demonstrates the advantages of product superposit...
متن کاملCoherent Superposition States as Quantum Rulers
We explore the sensitivity of an interferometer based on a quantum circuit for coherent states. We show that its sensitivity is at the Heisenberg limit. Moreover we show that this arrangement can measure very small length intervals. There exists a well known isomorphism between interferometers and basic quantum processing circuits. In particular the circuit comprising a Hadamard gate followed b...
متن کاملObserving a coherent superposition of an atom and a molecule
Mark R. Dowling,* Stephen D. Bartlett, Terry Rudolph, and Robert W. Spekkens School of Physical Sciences, The University of Queensland, St. Lucia, Queensland 4072, Australia School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia Optics Section, Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom Institute for Mathematical Sciences, Imperial...
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ژورنال
عنوان ژورنال: Optics Communications
سال: 2000
ISSN: 0030-4018
DOI: 10.1016/s0030-4018(99)00545-3