Quantum Communication: Two-Way Messaging Without Physical Link?

In summary, some scientists recently received a Nobel Prize for their ability to measure changes in quantum states without destroying quantum confinement. This has raised the question of whether it is possible to create two-way communication without any physical link between two different places. However, it is not possible to transfer useful information quicker than light or without any transfer of light, particles, or similar means. While quantum communication may be used for satellites, a transfer channel is still necessary for transmitting information.
  • #1
Stanley514
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  • #2
You cannot transfer (useful) information quicker than light (or without any transfer of light, particles or similar). You can get the same bits at the same time at two positions far away, but you cannot set those bits at one side to receive them at the other.
 
  • #3
You cannot transfer (useful) information quicker than light
I did not assume it.Could you teleport it slower than light and have two way communication?In one place I read that quantum communication maybe used for satellites.
If so, than any conventional link of communication will NOT be used?
http://www.quantum.at/research/quan...tanglement/entangled-photons-over-144-km.html
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=1263786&url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F2944%2F28271%2F01263786
http://www.newscientist.com/article/dn19234-satellite-quantum-communication-circles-closer.html
 
  • #4
You always need a transfer channel to transmit information from A to B. This can be classical, this can be particles in specific quantum states, or whatever, but you have to transfer something.
 

What is quantum communication?

Quantum communication is a method of transmitting information through the use of quantum systems, such as photons, without the need for a physical link between the sender and receiver.

How does quantum communication work?

Quantum communication uses the principles of quantum mechanics to encode information into quantum systems, such as photons, and then transmit them to a receiver. The receiver can then decode the information using quantum measurements, ensuring the security of the communication.

What is the advantage of using quantum communication over traditional communication methods?

The main advantage of quantum communication is its high level of security. Since quantum systems cannot be observed or measured without being disturbed, any attempt to intercept the information being transmitted would be detected, making it nearly impossible for hackers to access the information.

What is two-way messaging in quantum communication?

Two-way messaging in quantum communication refers to the ability to send and receive information in both directions without the need for a physical link between the sender and receiver. This allows for secure communication over long distances, making it ideal for applications such as secure messaging and data transfer.

What are some potential applications of quantum communication?

Quantum communication has many potential applications, including secure messaging and data transfer, quantum cryptography, and quantum networking. It also has potential uses in fields such as banking, government, and healthcare, where secure communication is crucial.

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