Quantum entangled states just got more stable, and readable...
Quantum entanglement between a single photon and a trillion rubidium atoms
“The entanglement in the real and momentum space, described in the Optica article, can be used jointly with other well-known degrees of freedom such as polarization, allowing generation of so-called hyper-entanglement.”
and using the phase to communicate info of entangled photon
“quantum mechanics was found to allow for communication, even without the actual transmission of physical particles. From the viewpoint of communication, this mystery stems from a (nonintuitive) fundamental concept in quantum mechanics—wave-particle duality. All particles can be described fully by wave functions. To determine whether light appears in a channel, one refers to the amplitude of its wave function. However, in counterfactual communication, information is carried by the phase part of the wave function. Using a single-photon source, we experimentally demonstrate the counterfactual communication and successfully transfer a monochrome bitmap from one location to another by using a nested version of the quantum Zeno effect. ”
Quantum entangled states just got more stable, and readable...
Quantum entanglement between a single photon and a trillion rubidium atoms
“The entanglement in the real and momentum space, described in the Optica article, can be used jointly with other well-known degrees of freedom such as polarization, allowing generation of so-called hyper-entanglement.”
https://phys.org/news/2017-03-quantum-entanglement-photon-trillion-rubidium.html
https://www.osapublishing.org/optica/abstract.cfm?uri=optica-4-2-272
and using the phase to communicate info of entangled photon
“quantum mechanics was found to allow for communication, even without the actual transmission of physical particles. From the viewpoint of communication, this mystery stems from a (nonintuitive) fundamental concept in quantum mechanics—wave-particle duality. All particles can be described fully by wave functions. To determine whether light appears in a channel, one refers to the amplitude of its wave function. However, in counterfactual communication, information is carried by the phase part of the wave function. Using a single-photon source, we experimentally demonstrate the counterfactual communication and successfully transfer a monochrome bitmap from one location to another by using a nested version of the quantum Zeno effect. ”
https://phys.org/news/2017-05-counterfactual-quantum.html
http://www.pnas.org/content/early/2017/04/19/1614560114