Stochastic resonance of quantum discord
نویسندگان
چکیده
Chee Kong Lee,1,* Leong Chuan Kwek,1,2 and Jianshu Cao3 1Centre for Quantum Technologies, National University of Singapore, 117543 Singapore 2National Institute of Education and Institute of Advanced Studies, Nanyang Technological University, 637616 Singapore 3Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA (Received 7 August 2011; published 19 December 2011)
منابع مشابه
Dynamics of entangled quantum optical system in independent media
We study the dynamics of two three-level atoms interacting with independent bosonic Lorentzian reservoirs at zero temperature. Such systems can be created in far astronomical objects. Quantum mechanical behaviour of these particles can produce detectable effects on the spectroscopic identifications of these objects, if such behaviour remain stable during the interaction with their media. It is ...
متن کاملNonzero Classical Discord.
Quantum discord is the quantitative difference between two alternative expressions for bipartite mutual information, given respectively in terms of two distinct definitions for the conditional entropy. By constructing a stochastic model of shared states, classical discord can be similarly defined, quantifying the presence of some stochasticity in the measurement process. Therefore, discord can ...
متن کاملQuantum discord in quantum computation
Quantum discord is a measure of the quantumness of correlations. After reviewing its different versions and properties, we apply it to the questions of quantum information processing. First we show that changes in discord in the processed unentangled states indicate the need for entanglement in the distributed implementation of quantum gates. On the other hand, it was shown that zero system-env...
متن کاملحفظ و مقایسه درهمتنیدگی، ناسازگاری و همدوسی کوانتومی بین کیوبیتهای متحرک در کاواکهای نشت کننده
In this study, we consider a composed system consisting of two identical non-interacting subsystems. Each sub-system is made of a moving qubit into a leaky cavity. The study of the dynamic of the composed system revealed that compared with the stationary qubits, entanglement, quantum discord and coherence between two moving qubits remained close to their initial values as time went by. In parti...
متن کاملReview of quantum discord in bipartite and multipartite systems
Quantum information and computation, based on quantum correlations of quantum systems, is one of the promising new fields of physics and information science. Entanglement is the key resource of quantum information processing. However, it is shown recently that quantum entanglement is not the only kind of quantum correlations useful for quantum information processing. Quantum systems without any...
متن کامل