Generating quantum superposition states in a levitated nanodiamond
Autor: | Mishkatul Bhattacharya, Sandeep Sharma |
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Rok vydání: | 2020 |
Předmět: |
Physics
Quantum superposition Time evolution Degrees of freedom (physics and chemistry) Statistical and Nonlinear Physics 01 natural sciences Atomic and Molecular Physics and Optics Magnetic field 010309 optics Quantum mechanics 0103 physical sciences Quantum metrology Wigner distribution function Coherent states Spin (physics) |
Zdroj: | Journal of the Optical Society of America B. 37:1620 |
ISSN: | 1520-8540 0740-3224 |
Popis: | We propose a method to generate transiently nonclassical motional states in a levitated optomechanical system. The nonclassicality arises from a nonlinearity induced by coupling the mechanical motion of a nanodiamond carrying a nitrogen-vacancy center with its spin degrees of freedom using a second-order magnetic field gradient (MFG). We employ a Fokker–Planck equation for the Wigner distribution to study the effect of the induced nonlinearity on the dynamics of the system. The time evolution of the Wigner distribution reveals the transient generation of several nonclassical states. The presence of these states is also confirmed by the negativity of the Wigner function. We expect such nonclassical states to have potential applications in quantum information processing and quantum metrology. |
Databáze: | OpenAIRE |
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