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Creating order from random fluctuations in small spin ensembles
R Budakian1, H J Mamin, B W Chui
1IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA. budakian@us.ibm.com
Science (New York, N.Y.)
|January 22, 2005
Summary
Researchers harnessed statistical spin fluctuations to create spin order using a magnetic resonance force microscope. This spin order can be stored for 30 seconds and then read out.
Area of Science:
- Physics
- Quantum Mechanics
- Materials Science
Background:
- Statistical fluctuations in electron spins are inherent in small ensembles.
- Controlling and utilizing these fluctuations for ordered spin states is challenging.
Purpose of the Study:
- To demonstrate methods for creating and controlling spin order from natural spin fluctuations.
- To investigate the storage and readout capabilities of the created spin order.
Main Methods:
- Utilized a magnetic resonance force microscope (MRFM) to interact with electron spins.
- Employed two distinct techniques: selective capture of transient spin order and real-time feedback rectification of spin fluctuations.
Main Results:
- Successfully created spin order by harnessing statistical fluctuations in electron spin ensembles.
- Demonstrated two novel methods for spin hyperpolarization and fluctuation rectification.
- Achieved storage of the created spin order for approximately 30 seconds (longitudinal relaxation time).
Conclusions:
- Spin order can be actively generated and controlled from inherent statistical spin fluctuations.
- The developed methods offer new pathways for manipulating spin states at the nanoscale.
- The ability to store and read out spin order has implications for quantum information processing and sensing.
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