期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.180602
关键词
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资金
- CSIR [03(1345)/16/EMR-II]
- [DST/SJF/PSA-03/2012-13]
We experimentally study the response of star-shaped clusters of initially unentangled N = 4, 10, and 37 nuclear spin-1/2 moments to an inexact pi-pulse sequence and show that an king coupling between the center and the satellite spins results in robust period-2 magnetization oscillations. The period is stable against bath effects, but the amplitude decays with a timescale that depends on the inexactness of the pulse. Simulations reveal a semiclassical picture in which the rigidity of the period is due to a randomizing effect of the Larmor precession under the magnetization of surrounding spins. The timescales with stable periodicity increase with net initial magnetization, even in the presence of perturbations, indicating a robust temporal ordered phase for large systems with finite magnetization per spin.
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