Two-Qubits in a Large-S Environment

Proceedings

Alessandro Cuccoli¹  Paola Verrucchi¹  Eliana Fiorelli² 

[1] Dipartimento di Fisica e Astronomia, Università di Firenze, I-50019 Sesto Fiorentino (FI), Italy;School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK;

关键词: entanglement;    quantum devices;    environment;   

DOI  :  10.3390/proceedings2019012010

来源: DOAJ

【 摘 要 】

We analytically express the loss of entanglement between the components of a quantum device due to the generation of quantum correlations with its environment, and show that such loss diminishes when the latter is macroscopic and displays a semi-classical behaviour. We model the problem as a device made of a couple of qubits with a magnetic environment: this choice allows us to implement the above condition of semi-classical macroscopicity in terms of a large-S condition, according to the well known equivalence between classical and $S\to \infty$ limit. A possible strategy for protecting internal entanglement exploiting the mechanism of domain-formation typical of critical dynamics is also suggested.

【 授权许可】

Unknown