Quantum Measurement in Electric Circuit
| dc.creator | Levitov, L. S. | |
| dc.creator | Lesovik, G. B. | |
| dc.date | 1994-01-03 | |
| dc.date.accessioned | 2026-07-07T03:07:04Z | |
| dc.date.available | 2026-07-07T03:07:04Z | |
| dc.description | We study fluctuations of electric current in a quantum resistor and derive a general quantum-mechanical formula for the distribution of transmitted charge. For that we introduce a scheme of current measurement that involves a spin $1/2$ coupled to the current so that it precesses at the rate proportional to the current. Our approach allows the study of charge transfer without breaking the circuit. We analyze a single channel conductor and derive electron counting statistics for arbitrary relation between temperature and voltage. For a perfectly transmitting channel the counting distribution is gaussian, both for zero-point fluctuations and at finite temperature. At constant voltage and low temperature the distribution is binomial, i.e., it arises from Bernoulli statistics. | |
| dc.description | 10 pages, RevTeX 3.0 | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9401004 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9401004 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/27037 | |
| dc.subject | Condensed Matter | |
| dc.title | Quantum Measurement in Electric Circuit | |
| dc.type | text |