Magnon squeezing in an antiferromagnet: Reducing the spin noise below the standard quantum limit

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The quantum squeezing of a collective spin-wave excitation (magnon) was investigated using femtosecond optical pulses. The quantum squeezed magnon was used to generate correlations involving pairs of spins in an antiferromagnetic insulator MnF2. It was found that the fluctutations of the magnetizati...

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Detalles Bibliográficos
Autores principales: Zhao, J., Bragas, A.V., Lockwood, D.J., Merlin, R.
Formato: JOUR
Materias:
Anisotropy
Crystallography
Dispersions
Electromagnetic fields
Fourier transforms
Ground state
Hamiltonians
Magnetization
Manganese compounds
Oscillations
Phonons
Quantum theory
Raman scattering
Refractive index
Time domain analysis
Vectors
Magnons
Quantum limits
Raman coupling
Spin noise
Antiferromagnetism
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00319007_v93_n10_p107203_Zhao
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The quantum squeezing of a collective spin-wave excitation (magnon) was investigated using femtosecond optical pulses. The quantum squeezed magnon was used to generate correlations involving pairs of spins in an antiferromagnetic insulator MnF2. It was found that the fluctutations of the magnetization of a crystallographic unit cell vary periodically in the squeezed state. The Fourier transform of the linear prediction (LP) fit to the time-domain compared well with the measured two-magnon Raman spectrum.

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