Quantum information with single fermions: teleportation and fermion-boson entanglement conversion

Details Quantum information with single fermions: teleportation and fermion-boson entanglement conversion Quantum information with single fermions: teleportation and fermion-boson entanglement conversion

2008-07-05

arxiv.org/abs/0807.0850v1

Physics

Quantum Physics

5 pages, 1 figure

Scientific paper

While single boson entanglement is known to be equivalent to standard non-identical particle entanglement, the use of fermionic entanglement is constrained by a parity superselection rule. Nevertheless we show that within the framework of second quantization, where local modes play the role of qubits, the analogy with ordinary entanglement holds: two entangled spinless fermion modes can be used to teleport a single local fermion mode and to perform standard dense coding. Entanglement concentration and dilution are possible for fermions. We clarify the meaning of our results by discussing the connection with quantum reference frames and conversion between spinless fermion entanglement and spinless boson entanglement.

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