Quantum Information Processing

Heterogeneous spin systems for quantum computation seek to combine the strengths of their constituents: electron spins for fast, versatile and high-fidelity readout and control, and nuclear spins operating as well-shielded quantum bits for storage and processing information.

Solid-State Quantum Register (c)
Solid-State Quantum Register

Quantum Information Processing

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. At PI3, we use point defects in diamond for implementing quantum information protocols. Qubits are defined as spin states of single electron or nuclear spins, and the long coherence time of either of these both at room and low temperatures allows us to perform quantum algorithms, quantum error-correction and achieve multi-partite entanglement. Using resonant excitation at low temperature we use these systems for realizing quantum repeater networks, and photon memories.

Room-temperature coherent coupling of single spins in diamond, with applications towards engineering quantum entangled states.

Quantum Entanglement (c)
Quantum Entanglement

The shallow NV center spin couples to the electron spins of doubly spin-labeled polyprolines. Such structures form the elementary building block, of which a quantum network can be comprised in a scalable way.

Molecular spin network (c)
Molecular spin network
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