Quantum non-Markovianity and quantum Darwinism are two phenomena linked by a common theme: the flux of quantum information between a quantum system and the quantum environment it interacts with. In this work, making use of a quantum collision model, a formalism initiated by Sudarshan and his school, we will analyse the efficiency with which the information about a single qubit gained by a quantum harmonic oscillator, acting as a meter, is transferred to a bosonic environment. We will show how, in some regimes, such quantum information flux is inefficient, leading to the simultaneous emergence of non-Markovian and non-darwinistic behaviours.

Lorenzo S., Paternostro M., & Palma G.M. (2019). Reading a Qubit Quantum State with a Quantum Meter: Time Unfolding of Quantum Darwinism and Quantum Information Flux. OPEN SYSTEMS & INFORMATION DYNAMICS, 26(4), 1950023 [10.1142/S1230161219500239].

Reading a Qubit Quantum State with a Quantum Meter: Time Unfolding of Quantum Darwinism and Quantum Information Flux

Lorenzo S.
;
Palma G. M.
2019

Abstract

Quantum non-Markovianity and quantum Darwinism are two phenomena linked by a common theme: the flux of quantum information between a quantum system and the quantum environment it interacts with. In this work, making use of a quantum collision model, a formalism initiated by Sudarshan and his school, we will analyse the efficiency with which the information about a single qubit gained by a quantum harmonic oscillator, acting as a meter, is transferred to a bosonic environment. We will show how, in some regimes, such quantum information flux is inefficient, leading to the simultaneous emergence of non-Markovian and non-darwinistic behaviours.
Settore FIS/03 - Fisica Della Materia
Lorenzo S., Paternostro M., & Palma G.M. (2019). Reading a Qubit Quantum State with a Quantum Meter: Time Unfolding of Quantum Darwinism and Quantum Information Flux. OPEN SYSTEMS & INFORMATION DYNAMICS, 26(4), 1950023 [10.1142/S1230161219500239].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/415722
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