Physics – Quantum Physics
Scientific paper
2008-08-17
Physical Review A 75, 022310 (2007)
Physics
Quantum Physics
Scientific paper
10.1103/PhysRevA.75.022310
We present a general scheme for implementing bi-directional quantum state transfer in a quantum swapping channel. Unlike many other schemes for quantum computation and communication, our method does not require qubit couplings to be switched on and off. The only control variable is the bias acting on individual qubits. We show how to derive the parameters of the system (fixed and variable) such that perfect state transfer can be achieved. Since these parameters vary linearly with the pulse width, our scheme allows flexibility in the time scales under which qubits evolve. Unlike quantum spin networks, our scheme allows the transmission of several quantum states at a time, requiring only a two qubit separation between quantum states. By pulsing the biases of several qubits at the same time, we show that only eight bias control lines are required to achieve state transfer along a channel of arbitrary length. Furthermore, when the information to be transferred is purely classical in nature, only three bias control lines are required, greatly simplifying the circuit complexity.
Behrman E. C.
Gagnebin P. K.
Skinner Sam
Steck J. E.
No associations
LandOfFree
Quantum state transfer with untuneable couplings does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum state transfer with untuneable couplings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum state transfer with untuneable couplings will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-580948