\t\t\t\t\t\n\t\t\t\t<\/div>\n
\n
Record-breaking entanglement uses photon polarization, position and orbital angular momentum<\/p>\n<\/h4>\n
\t\t\t<\/a>
\n\t\t<\/article>\n
Physicist <\/span>Dan Gauthier<\/a><\/span> of Ohio State University in the US is less enthusiastic, arguing that other groups have done similar work using less elaborate methods. He also sees a drawback in the protocol itself: \u201cIn the quantum parlance this is what\u2019s called a projective measurement,\u201d he says; \u201cIf the photon happens to be in the state you\u2019re looking for see a click. If it\u2019s not you gain no information. So if they have a d dimensional space the real benefit to what they\u2019re doing is completely lost because every time they make a measurement there\u2019s only a 1\/d chance that they picked the correct mode in which to make it.\u201d The researchers accept this criticism and are working to remedy it.<\/span><\/p>\n\n