dorsal/arxiv
View SchemaCoherent Spin Dynamics into Space Quantization
| Authors | Masato Morifuji |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0609039 |
| URL | https://arxiv.org/abs/quant-ph/0609039 |
Abstract
We propose a mechanism to describe how a physical quantity, which initially can take continuous values, is restricted within some discrete values after a measurement. As an example of the present theory, in which interplay between coherence of motion and fluctuation from disturbance plays an important role, we investigate motion of a spin state in a magnetic field. First, we point out that discrete eigenstates are formed from continuous states as a result of coherence of precession motion of a spin. Next, by assuming disturbance from environmental electromagnetic fields, we investigate temporal change of direction of a spin state by applying the first order perturbation theory and the Monte Carlo technique. Results of simulations show that the spins, whose directions are randomly distributed at the initial time, are reoriented toward only two directions due to fluctuation guided by coherence.
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"abstract": "We propose a mechanism to describe how a physical quantity, which initially\ncan take continuous values, is restricted within some discrete values after a\nmeasurement. As an example of the present theory, in which interplay between\ncoherence of motion and fluctuation from disturbance plays an important role,\nwe investigate motion of a spin state in a magnetic field. First, we point out\nthat discrete eigenstates are formed from continuous states as a result of\ncoherence of precession motion of a spin. Next, by assuming disturbance from\nenvironmental electromagnetic fields, we investigate temporal change of\ndirection of a spin state by applying the first order perturbation theory and\nthe Monte Carlo technique. Results of simulations show that the spins, whose\ndirections are randomly distributed at the initial time, are reoriented toward\nonly two directions due to fluctuation guided by coherence.",
"arxiv_id": "quant-ph/0609039",
"authors": [
"Masato Morifuji"
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"title": "Coherent Spin Dynamics into Space Quantization",
"url": "https://arxiv.org/abs/quant-ph/0609039"
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