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Phys. Rev. Lett. 93, 107203 (2004) [4 pages]

Magnon Squeezing in an Antiferromagnet: Reducing the Spin Noise below the Standard Quantum Limit

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Jimin Zhao1, A. V. Bragas1,*, D. J. Lockwood2, and R. Merlin1
1Focus Center and Department of Physics, The University of Michigan, Ann Arbor, Michigan, 48109-1120, USA
2Institute for Microstructural Sciences, National Research Council, Ottawa K1A 0R6, Canada

Received 17 November 2003; published 2 September 2004

We report the first experimental demonstration of quantum squeezing of a collective spin-wave excitation (magnon) using femtosecond optical pulses to generate correlations involving pairs of spins in an antiferromagnetic insulator MnF2. In the squeezed state, the fluctuations of the magnetization of a crystallographic unit cell vary periodically in time and are reduced below that of the ground-state quantum noise.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.107203
DOI:
10.1103/PhysRevLett.93.107203
PACS:
75.90.+w, 42.50.Dv, 42.65.Dr, 78.47.+p

*Present address: FCEyN, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.

 
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