Measurement of non-commuting spin components using spin-orbit interaction
| Autor: | Sokolovski, D., Sherman, E. Ya. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Phys.Rev.A 84, 030101(R) (2011) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.84.030101 |
| Popis: | We analyze the physical meaning of a possible experiment aimed at the simultaneous measurement of two non-commuting spin components. We demonstrate that switching of a strong spin-orbit interaction, e.g., in a solid state or a cold-atom system, for a short period of time simulates a simultaneous von Neumann measurement of spin components, $\sigma_x$ and $\sigma_y$. By mapping spin dynamics onto coordinate-space motion, such a measurement determines time averages of $\sigma_x$ and $\sigma_y$ which, unlike their instantaneous values, may be evaluated simultaneously to an arbitrary accuracy. Comment: 4 pages, 4 figures |
| Databáze: | arXiv |
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