Strong polygamy of quantum correlations in multi-party quantum systems
نویسندگان
چکیده
منابع مشابه
Multi-Party Quantum Dialogue with the Capability to Expand the Number of Users at Runtime
Quantum dialogue is a type of quantum communication in which users can simultaneously send messages to each other. The earliest instances of quantum dialogue protocols faced security problems such as information leakage and were vulnerable to intercept and resend attacks. Therefore, several protocols have been presented that try to solve these defects. Despite these improvements, the quantum di...
متن کاملMulti-party Quantum Computation
We investigate definitions of and protocols for multi-party quantum computing in the scenario where the secret data are quantum systems. We work in the quantum information-theoretic model, where no assumptions are made on the computational power of the adversary. For the slightly weaker task of verifiable quantum secret sharing, we give a protocol which tolerates any t < n/4 cheating parties (o...
متن کاملMonogamy and Polygamy of Entanglement in Multipartite Quantum Systems
One distinct property of quantum entanglement from other classical correlations is that multipartite entanglements cannot be freely shared among the parties: If two parties in a multi-party system share a maximally entangled state, then they cannot share any entanglement with the rest. This is known as monogamy of entanglement (MoE) [1], which is a key ingredient for secure quantum cryptography...
متن کاملMultipartite quantum correlations in open quantum systems
In this paper, we present a measure of quantum correlation for a multipartite system, defined as the sum of the correlations for all possible partitions. Our measure can be defined for quantum discord (QD), geometric quantum discord or even for entanglement of formation (EOF). For tripartite pure states, we show that the multipartite measures for the QD and the EOF are equivalent, which allows ...
متن کاملMulti-time correlations in relaxing quantum dynamical systems
In this paper, we consider the long time asymptotics of multi-time correlation functions for quantum dynamical systems that are sufficiently random to relax to a “reference state”. In particular, the evolution of such systems must have a continuous spectrum. Special attention is paid to general dynamical clustering conditions and their consequences for the structure of fluctuations of temporal ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal D
سال: 2014
ISSN: 1434-6060,1434-6079
DOI: 10.1140/epjd/e2014-50411-1