2,318 research outputs found
Generation of pure, ionic entangled states via linear optics
In this paper, we propose a novel scheme to generate two-ion maximally
entangled states from either pure product states or mixed states using linear
optics. Our new scheme is mainly based on the ionic interference. Because the
proposed scheme can generate pure maximally entangled states from mixed states,
we denote it as purification-like generation scheme. The scheme does not need a
Bell state analyzer as the existing entanglement generation schemes do, it also
avoids the difficulty of synchronizing the arrival time of the two scattered
photons faced by the existing schemes, thus the proposed new entanglement
generation scheme can be implemented more easily in practice.Comment: 6 pages, 4 figure
Scheme for deterministic Bell-state-measurement-free quantum teleportation
A deterministic teleportation scheme for unknown atomic states is proposed in
cavity QED. The Bell state measurement is not needed in the teleportation
process, and the success probability can reach 1.0. In addition, the current
scheme is insensitive to the cavity decay and thermal field.Comment: 3 pages, no figur
Concentration for unknown atomic entangled states via cavity decay
We present a physical scheme for entanglement concentration of unknown atomic
entangled states via cavity decay. In the scheme, the atomic state is used as
stationary qubit and photonic state as flying qubit, and a close maximally
entangled state can be obtained from pairs of partially entangled states
probabilistically.Comment: Three pages, Two figure
Entanglement concentration for unknown atomic entangled states via entanglement swapping
An entanglement concentration scheme for unknown atomic entanglement states
is proposed via entanglement swapping in cavity QED. Because the interaction
used here is a large-detuned one between two driven atoms and a quantized
cavity mode, the effects of the cavity decay and thermal field have been
eliminated. These advantages can warrant the experimental feasibility of the
current scheme.Comment: 4 page
- …