Project Objectives
Criteria of success
We will consider our project to be successful if:
- We fabricate microSQUIDs able to measure the spin state of a single magnetic particle with a net spin not larger than 3000. More important that the actual number is the creation in Europe of the knowledge and ability to further extend the construction of high sensitivity microSQUIDs.
- We demonstrate experimentally the dependence of the decoherence timeon the purity degree of the magnetic qubit sample.
- We develope a practical experimental procedure for the deposition of the magnetic qubits inside the microSQUIDs.
- We demonstrate experimental control over the spin tunneling rate by prior knowledge of the terms entering the spin Hamiltonian.
- We control the phonon emission after the magnetic tunneling processes,demonstrating decoherence control.
- We produce Rabi oscillations between two spin levels inside one potential well and between the two levels corresponding to the symmetric and antisymmetric combination of the two spin ground states in adjacent wells connected by tunnelling. This should be performed first for an ensemble of qubits and will also be tried in a single qubit once appropriate spin measurement techniques exist.
- We define and understand the interaction between qubits appropiate to the experimental scenario for mutually coupled qubits.
- We generate the basis for two qubit entanglement. That is, we show the control of the interaction between qubits in a fast on/off operation.
- We identify new magnetic systems as qubits. Both the value of net spin and that corresponding to the barrier height should be under control.
It should be noted that success with all the above criteria would place the proposers in the pole position for the realisation of a scalable quantum computer.
