3 citations
2 papers
quant-ph2006
How `hot' are mixed quantum states?
George Parfionov, Roman R. Zapatrin
Given a mixed quantum state of a qudit, we consider any observable as a kind of `thermometer' in the following sense. Given a source which emits pure states with these or t…
quant-ph2006★ 3 cited
`Lazy' quantum ensembles
George Parfionov, Roman Zapatrin
We compare different strategies aimed to prepare an ensemble with a given density matrix . Preparing the ensemble of eigenstates of with appropriate probabilities can be tre…