Results 11 to 20 of about 943 (251)
Decoherence-Induced Sudden Death of Entanglement and Bell Nonlocality
Photonics, 2022 Decoherence due to the unwanted interaction between a quantum system and environment leads to the degradation of quantum coherence. In particular, for an entangled state, decoherence makes a loss of entanglement and Bell nonlocality known as entanglement
Dong-Gil Im, Yoon-Ho Kim
doaj +3 more sources
Entanglement microscopy and tomography in many-body systems [PDF]
Nature CommunicationsQuantum entanglement uncovers the essential principles of quantum matter, yet determining its structure in realistic many-body systems poses significant challenges.
Ting-Tung Wang +4 more
doaj +2 more sources
Disentanglement Dynamics in Nonequilibrium Environments [PDF]
Entropy, 2022 We theoretically study the non-Markovian disentanglement dynamics of a two-qubit system coupled to nonequilibrium environments with nonstationary and non-Markovian random telegraph noise statistical properties. The reduced density matrix of the two-qubit
Mingli Chen +3 more
doaj +2 more sources
Non-Markovian noise mitigation in quantum teleportation: enhancing fidelity and entanglement [PDF]
Scientific ReportsMaintaining quantum coherence and entanglement in the presence of environmental noise, particularly within non-Markovian contexts, represents a significant challenge for the progression of quantum information science and technology.
Haiyang Zhang +8 more
doaj +2 more sources
Sudden death of effective entanglement [PDF]
Physical Review A, 2010 Sudden death of entanglement is a well-known effect resulting from the finite volume of separable states. We study the case when the observer has a limited measurement capability and analyse the effective entanglement, i.e. entanglement minimized over the output data.
Roszak, K., Horodecki, P., Horodecki, R.
+5 more sources
Universality of sudden death of entanglement [PDF]
Quantum Information and Computation, 2011 We present a constructive argument to demonstrate the universality of the sudden death of entanglement in the case of two non-interacting qubits, each of which generically coupled to independent Markovian environments at zero temperature. Conditions for the occurrence of the abrupt disappearance of entanglement are determined and, most importantly ...
Felipe F. Fanchini +2 more
openaire +2 more sources
Entropy, 2021 In this paper, we study a Hamiltonian system constituted by two coupled two-level atoms (qubits) interacting with a nonlinear generalized cavity field. The nonclassical two-qubit correlation dynamics are investigated using Bures distance entanglement and
A.-B. A. Mohamed +3 more
doaj +1 more source
A study on the sudden death of entanglement [PDF]
Physics Letters A, 2007 The dynamics of entanglement and the phenomenon of entanglement sudden death (ESD) \cite{yu} are discussed in bipartite systems, measured by Wootters Concurrence. Our calculation shows that ESD appears whenever the system is open or closed and is dependent on the initial condition.
Cui, H. T., Li, K., Yi, X. X.
openaire +3 more sources
Entanglement-breaking channels and entanglement sudden death [PDF]
Physical Review A, 2016 The occurrence of entanglement sudden death in the evolution of a bipartite system depends on both the initial state and the channel responsible for the evolution. An extreme case is that of entanglement braking channels, which are channels that acting on only one of the subsystems drives them to full disentanglement regardless of the initial state. In
Knoll, Laura Tamara +4 more
openaire +3 more sources
Physical Review Research, 2023 Entanglement is known to decay even in isolated systems, an effect attributed to spontaneous emission. This fragility of entanglement can be exacerbated by entanglement sudden death (ESD), where entanglement drops to zero abruptly within a finite time ...
Songbo Xie +2 more
doaj +1 more source