Quantum bus
A quantum bus is a device which can be used to store or transfer information between independent
quantum computer, or combine two qubits into a superposition. It is the quantum analog of a classical bus
.
There are several physical systems that can be used to realize a quantum bus, including
trapped ions, photons, and superconducting qubits. Trapped ions, for example, can use the quantized motion of ions (phonons) as a quantum bus, while photons can act as a carrier of quantum information by utilizing the increased interaction strength provided by cavity quantum electrodynamics. Circuit quantum electrodynamics, which uses superconducting qubits coupled to a microwave cavity on a chip, is another example of a quantum bus that has been successfully demonstrated in experiments.[1]
History
The concept was first demonstrated by researchers at
Mathematical description
A quantum bus for
resonance cavity. The hamiltonian
for a system with qubit A, qubit B, and the resonance cavity or quantum bus connecting the two is where is the single qubit hamiltonian, is the raising or lowering operator for creating or destroying excitations in the th qubit, and is controlled by the amplitude of the D.C. and radio frequency flux bias.[6]
References
- ^ S2CID 8467224.
- S2CID 4357331.
- ^ "All Aboard the Quantum 'Bus'". 2007-09-27. Retrieved 2008-12-12.
- S2CID 118895065.
- ISBN 978-1-4471-0839-9.
- S2CID 4357331.
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