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Weizmann Institute of Science |
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Contact Information Tel : 972-8-9342332 Secretariat: |
Current Research Interest Quantum measurement and Decoherence; Zeno effect;
Quantum transport in mesoscopic systems; Multi-dimensional tunneling; Deep
inelastic scattering. The main topic of my current research is a quantum system interacting with the macroscopic environment (open quantum systems). In particular, I am interesting in transition between quantum and classical descriptions and quantum measurements, where macroscopic (mesoscopic) detectors are considered as a part of the environment. The central problems in this research are decoherence of a quantum system as a result of its interaction with the environment and a back-action of this system on the environment (quantum measurement). In order to treat these problems in a consistent way one needs to include the environment (macroscopic detector) in the Schrödinger description of an entire system. I believe that only in this way one can make an advance in understanding the measurement process and to resolve basic problems related to measurements of a single quantum system. For a realization of this program I am using
a new approach of modified Bloch-type rate equations, obtained by a partial tracing
of the environment in the density matrix of an entire system. The resulting
equations are different from the standard “optical” Bloch equations by
additional variables related to the environment. It allows us to study
simultaneously the quantum system and the environment during their
interaction, and therefore to trace out dynamics of the measurement process. At present time I continue to develop this approach and apply it to different problems related to quantum transport and quantum measurements [4-12]. My last work on this subject [13] deals with the quantum interference and Coulomb blockade effects in electron transport through parallel dots. 1. 2. S.A. Gurvitz, Phys. Rev. B56, 15 215, (1997). 3. S.A. Gurvitz, Phys. Rev. B57, 6602, (1998). 4. Brahim Elattari and S.A. Gurvitz, Phys. Rev. A62, 032102 (2000). 5. Brahim Elattari and S.A. Gurvitz, Phys. Lett. A292, 289 (2002). 6. 7. 8. S.A. Gurvitz, IEEE Transactions on Nanotechnology, 4, 45 (2005). 9. S.A. Gurvitz, D. Mozyrsky and G.P. Berman, Phys. Rev. B72, 205341 (2005). 10. S.A. Gurvitz, International Journal of Modern Physics, B20, 1363 (2006). 11. T. Gilad and S.A. Gurvitz, Phys. Rev. Lett. 97, 116806 (2006). 12. S.A. Gurvitz, and D. Mozyrsky, Phys. Rev. B77, 075325 (2008). 13. Feng Li, Xin-Qi Li, Wei-Min Zhang, and S.A. Gurvitz, Europhys.
Lett. 88, 37001 (2009).
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