Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Superluminal_communication> ?p ?o. }
Showing items 1 to 22 of
22
with 100 items per page.
- Superluminal_communication abstract "Superluminal communication is the hypothetical process by which one might send information at faster-than-light (FTL) speeds. The scientific consensus is that faster-than-light communication is not possible and to date superluminal communication has not been achieved in any experiment[citation needed].Some theories and experiments include: Group velocity > c experiments Evanescent wave coupling Tachyons Quantum nonlocalityAccording to the currently accepted theory, three of those four phenomena do not produce superluminal communication, even though they may give that appearance under some conditions. The third, tachyons, arguably do not exist as their existence is hypothetical; even if their existence were to be proven, attempts to quantize them appear to indicate that they may not be used for superluminal communication, because experiments to produce or absorb tachyons cannot be fully controlled.If wormholes are possible, then ordinary subluminal methods of communication could be sent through them to achieve superluminal transmission speeds. Considering the immense energy that current theories suggest would be required to open a wormhole large enough to pass spacecraft through it may be that only atomic-scale wormholes would be practical to build, limiting their use solely to information transmission. Some theories of wormhole formation would prevent them from ever becoming "timeholes", allowing superluminal communication without the additional complication of allowing communication with the past.[citation needed]In standard quantum mechanics, it is generally accepted that the no cloning theorem prevents superluminal communication via quantum entanglement alone, leading to the no-communication theorem. Consider the EPR thought experiment, and suppose quantum states could be cloned. Alice could send bits to Bob in the following way:If Alice wishes to transmit a '0', she measures the spin of her electron in the z direction, collapsing Bob's state to either |z+>B or |z->B. If Alice wishes to transmit a '1', she measures the spin of her electron in the x direction, collapsing Bob's state to either |x+>B or |x->B. Bob creates many copies of his electron's state, and measures the spin of each copy in the z direction. If Alice transmitted a '0', all his measurements will produce the same result; otherwise, his measurements will be split evenly between +1/2 and -1/2. This would allow Alice and Bob to communicate across space-like separations.However, some authors have pointed out that at least some of the no-communication arguments are tautological, having the limitation on superluminal communication built into the starting assumptions.".
- Superluminal_communication wikiPageID "28751".
- Superluminal_communication wikiPageRevisionID "603185527".
- Superluminal_communication hasPhotoCollection Superluminal_communication.
- Superluminal_communication subject Category:Communication.
- Superluminal_communication subject Category:Faster-than-light_communication.
- Superluminal_communication subject Category:Physics_in_fiction.
- Superluminal_communication comment "Superluminal communication is the hypothetical process by which one might send information at faster-than-light (FTL) speeds.".
- Superluminal_communication label "Comunicazione superluminale".
- Superluminal_communication label "Comunicação superlumínica".
- Superluminal_communication label "Superluminal communication".
- Superluminal_communication label "اتصال أسرع من الضوء".
- Superluminal_communication label "超光速通信".
- Superluminal_communication sameAs Comunicazione_superluminale.
- Superluminal_communication sameAs 超光速通信.
- Superluminal_communication sameAs 초광속_통신.
- Superluminal_communication sameAs Comunicação_superlumínica.
- Superluminal_communication sameAs m.073td.
- Superluminal_communication sameAs Q7643754.
- Superluminal_communication sameAs Q7643754.
- Superluminal_communication wasDerivedFrom Superluminal_communication?oldid=603185527.
- Superluminal_communication isPrimaryTopicOf Superluminal_communication.