https://doi.org/10.1140/epjd/e2018-90420-4
Regular Article
Maximal entanglement and state transfer using Arthurs–Kelly type interaction for qubits
1
Department of Physics, Indian Institute of Science,
Bangalore 560012, India
2
HBCSE, Tata Institute of Fundamental Research,
Mumbai 400088, India
a e-mail: subhayan@terpmail.umd.edu
Received:
17
August
2018
Received in final form:
13
October
2018
Published online: 11 December 2018
We study entanglement generation between a system qubit and three apparatus qubits using an exactly solvable Arthurs–Kelly type model. We demonstrate the possibility of generating an EPR-like maximally entangled system-apparatus state, in which the second qubit of the usual EPR state is replaced by a three qubit state. We design a very simple protocol to transfer the unknown state of the system onto one of the apparatus qubits which can then be sent elsewhere via a quantum channel. This protocol can be seen as an alternative teleportation scheme.
Key words: Quantum Information
© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2018