Generation of Spin Entanglement in Nonequilibrium Quantum Dots
نویسندگان
چکیده
Stefan Legel, Jürgen König, Guido Burkard, 4 and Gerd Schön Institut für Theoretische Festkörperphysik and DFG-Center for Functional Nanostructures (CFN), Universität Karlsruhe, 76128 Karlsruhe, Germany Institut für Theoretische Physik III, Ruhr-Universität Bochum, 44780 Bochum, Germany Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland Institut für Theoretische Physik C, RWTH Aachen, D-52056 Aachen, Germany (Dated: February 5, 2008)
منابع مشابه
Generation and detection of a spin entanglement in nonequilibrium quantum dots
Spin entanglement between two spatially separated electrons can be generated in nonequilibrium interacting quantum dots, coherently coupled to a common lead. In this system entangled two-electron states develop which are Werner states with an imbalance between singlet and triplet probabilities. We propose a multi-terminal, multiply connected set-up for the generation and detection of this imbal...
متن کاملCorrelated Spin Transport in Nanostructures : Entanglement Creation and Spin Filtering
The ability to have nonlocal and pairwise entangled qubits is important for many quantum computing and quantum communication tasks. I review our proposals towards the realization of a solid state electron spin entangler, a device that creates a charge current carried by spin-entangled electrons which are nonlocal (EPR-pair) in space. An s-wave superconductor (SC) serves as the source of spin-en...
متن کاملSpin qubits in double quantum dots - entanglement versus the Kondo effect
We investigate the competition between pair entanglement of two spin qubits in double quantum dots attached to leads with various topologies and the separate entanglement of each spin with nearby electrodes. Universal behavior of entanglement is demonstrated in dependence on the mutual interactions between the spin qubits, the coupling to their environment, temperature and magnetic field. As a ...
متن کاملThermal effect and role of entanglement and coherence on excitation transfer in a spin chain
We analyze the role of bath temperature, coherence and entanglement on excitation transfer in a spin chain induced by the environment. In Markovian regime, we show that coherence and entanglement are very sensitive to bath temperature and vanish in time in contrary to the case of having zero-temperature bath. That is while, finding the last qubit of the chain in excited state increases by incre...
متن کاملSolid-state circuit for spin entanglement generation and purification.
We show how realistic charge manipulation and measurement techniques, combined with the exchange interaction, allow for the robust generation and purification of four-particle spin entangled states in electrically controlled semiconductor quantum dots. The generated states are immunized to the dominant sources of noise via a dynamical decoherence-free subspace; all additional errors are correct...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008