Decoherence - Fluctuation Relation and Measurement Noise
arXiv:quant-ph/9903072 · doi:10.1016/S0370-1573(99)00065-4
Abstract
We discuss fluctuations in the measurement process and how these fluctuations are related to the dissipational parameter characterising quantum damping or decoherence. On the example of the measuring current of the variable-barrier or QPC problem we show there is an extra noise or fluctuation connected with the possible different outcomes of a measurement. This noise has an enhanced short time component which could be interpreted as due to ``telegraph noise'' or ``wavefunction collapses''. Furthermore the parameter giving the the strength of this noise is related to the parameter giving the rate of damping or decoherence.
6 pages, no figures, for Okun Festschrift, Physics Reports
References in corpus (2)
Cited by in corpus (7)
- Counting statistics and detector properties of quantum point contacts
- Quadratic Quantum Measurements
- Environmental Influence on the Measurement Process in Stochastic Reduction Models
- Continuous measurements of two qubits
- Notes on relativistic superfluidity and gauge/string duality
- Direct access to quantum fluctuations through cross-correlation measurements
- Lessons of Coherence and Decoherence--From Neutrinos to SQUIDS