Editing Quantum teleportation (section)

=== Information quality ===

Considering the previously mentioned requirement of an intermediate entangled state for quantum teleportation, there needs to be consideration of the purity of this state for information quality. A protection that has been developed involves the use of continuous variable information (rather than a typical discrete variable) creating a superimposed coherent intermediate state. This involves making a phase shift in the received information and then adding a mixing step upon reception using a preferred state, which could be an odd or even coherent state, that will be "conditioned to the classical information of the sender", creating a two mode state that contains the originally sent information.<ref>{{cite journal |last1=Pandey |first1=Ravi |last2=Prakash |first2=Ranjana |last3=Prakash |first3=Hari |date=27 September 2021 |title=High success standard quantum teleportation using entangled coherent state and two-level atoms in cavities |journal=Quantum Inf Process |volume=20 |issue=10 |at=322 |doi=10.1007/s11128-021-03264-0|arxiv=2010.06829 |bibcode=2021QuIP...20..322P |s2cid=222341312 }}</ref>

There have also been developments with teleporting information between systems that already have quantum information in them. Experiments done by Feng, Xu, Zhou et al. have demonstrated that teleportation of a qubit to a photon that already has a qubit's worth of information is possible due to using an optical qubit-ququart entangling gate.<ref name="Feng, Tianfeng 2020"/> This quality can increase computation possibilities as calculations can be done based on previously stored information, allowing for improvements on past calculations.