Article

# Zeno dynamics yields ordinary constraints

Physical Review A (Impact Factor: 3.04). 01/2001; DOI: 10.1103/PhysRevA.65.012108

Source: arXiv

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**ABSTRACT:**We present an approach to monitoring and controlling a free quantum particle by coupling an internal (discrete) state of the particle to a detector (or probe). We consider a sequence of time-dependent, spatially localized interactions of the particle with the probe that are purely coherent (nondissipative), without mean energy-momentum exchange. We show that a sequence of such force-free interactions can freeze or deflect the particle.Physical Review A 05/2013; 87(5). · 3.04 Impact Factor -
##### Conference Paper: QUANTUM ZENON EFFECT ON CERTAIN WAVELET SUBSPACES QUANTUM ZENON EFFECT ON CERTAIN WAVELET SUBSPACES

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**ABSTRACT:**The basis of the so-called Zenon's effect in Quantum Mechanics, is the limiting behaviour of the unitary solution of Schroedinger's differential equation, under repeated measurements. We examine the limit of a sequence of operators composed by a usual operator and a wavelet projection operator.Sampta; 03/2013 - [Show abstract] [Hide abstract]

**ABSTRACT:**Based on the quantum Zeno effect [B. Misra and E. C. G. Sudarshan, J. Math. Phys. 18, 756 (1977)], we propose a scheme to achieve three-dimensional (3D) entanglement between two distant five-level atoms. In our scheme, the two atoms are trapped individually in two spatially-separated double-mode cavities connected by an optical fiber. It is found that the effective quantum Zeno dynamics of the composite cavity-fiber-cavity coupled system gives rise to the deterministic creation of the 3D entangled state with high fidelity. Moreover, only one step operation is required to complete the generation of the 3D entangled state. The numerical simulations clearly show that the proposed scheme is robust against the deviation of the system parameters and insensitive to various decoherence factors, including atomic spontaneous emissions, cavity decays and fiber photon leakages. We justify our scheme by considering the experimental feasibility within the currently available technology.Physical Review A 06/2013; 87(6):062316. · 3.04 Impact Factor

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