Asymmetric Bidirectional Quantum Teleportation: Arbitrary bi-modal Information State

TL;DR

This paper proposes a linear optical scheme for simultaneous asymmetric bidirectional quantum teleportation of bimodal entangled states and Schrödinger Cat states, achieving near-perfect fidelity with a success probability of one-eighth.

Contribution

It introduces a novel linear optical protocol for bidirectional teleportation of complex quantum states using a specific cluster state and heralded detection, with analysis of success probability and fidelity.

Findings

Achieves near-unity fidelity for intense coherent states.

Success probability of the protocol is one-eighth.

Not all detection events lead to successful teleportation.

Abstract

Optical coherent states are experimentally realizable continuous variable quantum states of which preparation by lasers, as well as its manipulation and monitoring by linear optical gadgets are well established. We propose a strategy to send an arbitrary superposition of four-component bimodal entangled coherent states from a sender to a receiver who, simultaneously, tries to transmit an unknown Schrodinger Cat coherent state to sender via employing a cluster consisting of three superposition of two component bimodal entangled coherent states as the quantum channel and utilizing linear optical gadgets. Heralded detection of photons in laboratories of sender and receiver followed by classical communications of even and odd number of photons and local unitary operations, impeccably, accomplishes simultaneous faithful asymmetric bidirectional quantum teleportation with one eighth of probability of success. It is seen that not all detection events implement the protocol and, therefore, one has to locally apply displacement operator, a necessary evil. We analyze near faithful partial asymmetric bidirectional quantum teleportation and associated probability of success therein. We demonstrated that, for an intense coherent optical field, fidelity approach unity.