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Qubits that never interact could exhibit past-future entanglement
http://phys.org/news/2012-07-qubits-interact-past-future-entanglement.html
During the first time interval, which the scientists call the past, P interacts with the field. Then P is quickly decoupled from the field for the second time interval. Finally, F is coupled to the field for a time interval called the future. Even though P and F never interact with the field at the same time or with each other at all, F’s interactions with the field cause it to become entangled with P.
Two qubits that share past-future entanglement could be used to create a device that teleports a quantum state in time. In other words, the state of qubit P could be transmitted to the future in the form of qubit F without being transmitted during the time interval when neither qubit is coupled to the field.
http://phys.org/news/2012-07-qubits-interact-past-future-entanglement.html
During the first time interval, which the scientists call the past, P interacts with the field. Then P is quickly decoupled from the field for the second time interval. Finally, F is coupled to the field for a time interval called the future. Even though P and F never interact with the field at the same time or with each other at all, F’s interactions with the field cause it to become entangled with P.
Two qubits that share past-future entanglement could be used to create a device that teleports a quantum state in time. In other words, the state of qubit P could be transmitted to the future in the form of qubit F without being transmitted during the time interval when neither qubit is coupled to the field.
