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Quantum communication through an unmodulated spin chain.
- S. Bose
- PhysicsPhysical review letters
- 6 December 2002
It is found that in a reasonable time, a qubit can be directly transmitted with better than classical fidelity across the full length of chains of up to 80 spins, and the channel allows distillable entanglement to be shared over arbitrary distances.
Spin Entanglement Witness for Quantum Gravity.
It is shown that despite the weakness of gravity, the phase evolution induced by the gravitational interaction of two micron size test masses in adjacent matter-wave interferometers can detectably entangle them even when they are placed far apart enough to keep Casimir-Polder forces at bay.
Photon-blockade-induced Mott transitions and XY spin models in coupled cavity arrays
We propose a physical system where photons could exhibit strongly correlated effects. We demonstrate how a Mott-insulator phase of atom-photon excitations (polaritons) can arise in an array of…
Communication capacity of quantum computation.
By considering quantum computation as a communication process, this formalism enables the link the mixedness of a quantum computer to its efficiency and also allows the critical level of mixedness beyond which there is no quantum advantage in computation to be derived.
Natural thermal and magnetic entanglement in the 1D Heisenberg model.
It is found that the entanglement in an antiferromagnetic chain can be increased by increasing the temperature or the external field, and increasing the field can also createEntanglement between otherwise disentangled spins.
Storing, processing, and retrieving an image using quantum mechanics
We investigate the storage and retrieval of an image in a multi-particle quantum mechanical system. Several models are studied and compared with corresponding classical digital methods. We consider a…
PURIFICATION VIA ENTANGLEMENT SWAPPING AND CONSERVED ENTANGLEMENT
We investigate the purification of entangled states by local actions using a variant of entanglement swapping. We show that there exists a measure of entanglement which is conserved in this type of…
COMMUNICATION IN XYZ ALL-TO-ALL QUANTUM NETWORKS WITH A MISSING LINK
It turns out that Kn does not exhibit perfect state transfer (PST), however, it is proved that deleting an edge in Kn allows PST between the two non-adjacent sites, when n is a multiple of four.
Multiparticle generalization of entanglement swapping
This work describes how this scheme allows to establish multiparticle entanglement between particles belonging to distant users in a communication network through a prior distribution of singlets followed by only local measurements.
Quantum communication through spin chain dynamics: an introductory overview
- S. Bose
- 1 January 2007
We present an introductory overview of the use of spin chains as quantum wires, which has recently developed into a topic of lively interest. The principal motivation is in connecting quantum…