NANOMAGIQC

Project Revision

Workpackage 4 Revised

All the works referring to qubit identification, spin coherence and the determination of decoherence phenomena will be performed by the UB group measuring simultaneously

• the spin state of the spin systems, and
• the emission/absorption of microwaves by the spin levels of the molecular clusters and small particles.

These microwave experiments will be carried out with samples provided by the CSIC-ICMAB group in an experimental setup that was constructed during the first year of the project which consists of

• external sources of microwaves,
• coaxial cables and waveguides to transport the microwaves to the cryostat,
• cavities and resonators,
• network analyzers,
• SQUID magnetometry, and
• magneto-optical measurements.

This experimental setup will allow us to measure the spin state of the molecules, by using either SQUID magnetometry or Kerr effect, when the magnetic systems either radiate or receive microwave irradiation.

All these works are very important to better understand the single molecule detectionas well as the influence of radiation on the determination of the spin value.

Concerning the microwave experiments, we believe it is very important to have a better control on how the microwave power arrives to the cavities and resonators.

In the second and third years we will work out the construction of resonators working until 110 GHz. We will joint efforts in setting the new instrumentation to work for operating in this frequency range.

In the scope of microwave experiments we also aim to understand better not only theenergy absorption by the spin energy levels but also the emission of coherent radiation. To perform these experiments we should be able to change faster the external magnetic field as well as to have faster methods to measure the spin state of the molecules.