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Quantum clock and Newtonian time
Dorje C. Brody, Lane P. Hughston
An extension of standard quantum mechanics is proposed in which the Newtonian time appearing as a parameter in the unitary evolution operator is replaced with the time shown by a `…
Phase-space measurements and decoherence for angular momentum systems
Dorje C. Brody, Eva-Maria Graefe, Rishindra Melanathuru
The monitoring of the three independent components of the angular momentum (or spin) of a quantum system by its environment that does not isolate any preferred orientation is model…
Decoherence from universal tomographic measurements
Dorje C. Brody, Rishindra Melanathuru
The decoherence phenomenon arising from an environmental monitoring of the state of a quantum system, as opposed to monitoring of a preferred observable, is worked out in detail us…
Decoherence Implies Information Gain
Dorje C. Brody, Lane P. Hughston
It is shown that if the wave function of a quantum system undergoes an arbitrary random transformation such that the diagonal elements of the density matrix in the decoherence basi…
Phase-space measurements, decoherence and classicality
Dorje C. Brody, Eva-Maria Graefe, Rishindra Melanathuru
The emergence of classical behaviour in quantum theory is often ascribed to the interaction of a quantum system with its environment, which can be interpreted as environmental moni…