منابع مشابه
Spin bath decoherence of quantum entanglement
We study an analytically solvable model for decoherence of a two spin system embedded in a large spin environment. As a measure of entanglement, we evaluate the concurrence for the Bell states (Einstein–Podolsky–Rosen pairs). We find that while for two separate spin baths all four Bell states lose their coherence with the same time dependence, for a common spin bath, two of the states decay fas...
متن کاملar X iv : q ua nt - p h / 04 06 00 1 v 1 3 1 M ay 2 00 4 Decoherence by a chaotic many - spin bath
We numerically investigate decoherence of a two-spin system (central system) by a bath of many spins 1/2. By carefully adjusting parameters, the dynamical regime of the bath has been varied from quantum chaos to regular, while all other dynamical characteristics have been kept practically intact. We explicitly demonstrate that for a many-body quantum bath, the onset of quantum chaos leads to si...
متن کاملQuantum-bath-driven decoherence of mixed spin systems
S. J. Balian,1 Gary Wolfowicz,2,3 John J. L. Morton,2,4 and T. S. Monteiro1,* 1Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom 2London Centre for Nanotechnology, University College London, London WC1H 0AH, United Kingdom 3Department of Materials, Oxford University, Oxford OX1 3PH, United Kingdom 4Department of Electronic and Electric...
متن کاملEntanglement Sharing and Decoherence in the Spin-Bath
The monogamous nature of entanglement has been illustrated by the derivation of entanglement sharing inequalities bounds on the amount of entanglement that can be shared amongst the various parts of a multipartite system. Motivated by recent studies of decoherence, we demonstrate an interesting manifestation of this phenomena that arises in system-environment models where there exists interacti...
متن کاملMeasuring central-spin interaction with a spin-bath by pulsed ENDOR: Towards suppression of spin diffusion decoherence.
We present pulsed electron-nuclear double resonance (ENDOR) experiments which enable us to characterize the coupling between bismuth donor spin-qubits in Si and the surrounding spin-bath of (29)Si impurities which provides the dominant decoherence mechanism (nuclear spin diffusion) at low temperatures (< 16 K). Decoupling from the spin-bath is predicted and cluster correlation expansion simulat...
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: Physical Review E
سال: 2005
ISSN: 1539-3755,1550-2376
DOI: 10.1103/physreve.72.026225