University of Tartu - Institute of Physics

Spectroscopy of entangled states of clusters of rare-earth impurity ions for quantum computing.
We consider a problem of creation and control of cooperative quantum states, entangled states (such as Bell and Greenberger–Horne–Zeilinger states) in groups of closely-spaced rare-earth impurity ions (large clusters with many energy levels). Coherence preservation in Re3+ doped fluoride crystals at low temperature can be longer than characteristic nanosecond time of quantum CNOT gates, which is enough to perform algorithmic operations in quantum computers. We do site-selective spectroscopy of quantum states of clusters of Nd3+, Ho3+, Er3+ ions in fluoride crystals to reveal the dynamical splitting (no magnetic field) of Stark levels due to coherent interaction between the ions.

Want to be part of our directory?

Apply now