Quantum effects can enhance the precision and sensitivity in detecting weak fields. The diamond spin defect turns out to be a surprisingly versatile and well controllable solid state quantum system, with long relaxation and coherence time of their quantum state with guaranteed high fidelity single spin control even at room temperatures. Precision sensing using quantum states of such defects usually relies on accurate measurements of their quantum phase, and is called quantum sensing, and the defects quantum sensors. At SQUTEC, we use quantum sensors powered by defects in solids to build devices that achieve high sensitivities in detecting extremely weak fields, either it be a pico-Tesla magnetic field or a μV/m electric field2, arising from spins and molecules, with a large bandwidth (15 orders) in resolution ranging from giga- to micro-Hertz fields.

Optically functionalized nanoparticles are an ideal structure for a variety of research fields ranging from biophotonics to quantum optics. At SQUTEC we exploit the multifunctional photonic properties of diamond nanocrystals for applications in medicine and industry.

Quantum computing is an attractive and multidisciplinary field, which became a focus for experimental and theoretical research during the last decade. Among other systems, such as ions in traps and superconducting circuits, solid state based qubits are considered to be promising candidates for use in in quantum hardware. Solid-state spins have already used to perform a variety of quantum algorithms, quantum error-correction and also achieve multi-partite entanglement. These systems are also used for realizing quantum repeater networks, and photon memories. At SQUTEC we provide software/hardware solutions when using point defects in diamond for implementing quantum information protocols..