Maximal entanglement and state transfer using Arthurs–Kelly type interaction for qubits

Abstract

Abstract: 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. Graphical abstract: [Figure not available: see fulltext.].