Volume 134, Number 6, June 2021
|Number of page(s)||7|
|Published online||17 August 2021|
Testing eigenstate decoherence hypothesis in a model of collisional decoherence
1 Skolkovo Institute of Science and Technology - Skolkovo Innovation Center 3, Moscow 143026, Russia
2 Moscow Institute of Physics and Technology - Institutsky per. 9, Dolgoprudny, Moscow region, 141700, Russia
3 Steklov Mathematical Institute of Russian Academy of Sciences, Department of Mathematical Methods for Quantum Technologies - Gubkina str. 8, Moscow 119991, Russia
Received: 10 March 2021
Accepted: 7 June 2021
The eigenstate decoherence hypothesis (EDH) asserts that each individual eigenstate of a large closed system is locally classical-like. We test this hypothesis for a heavy particle interacting with a gas of light particles. This system is paradigmatic for studies of the quantum-to-classical transition: the reduced state of the heavy particle is widely believed to rapidly loose any non-classical features due to the interaction with the gas. Yet, we find numerical evidence that the EDH is violated: certain eigenstates of this model are manifestly non-classical. Only the weak version of EDH referring to the majority (instead of the totality) of eigenstates holds.
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