Have you ever seen Schrodinger’s cat? Probably not, because cats are macroscopic, and quantum effects typically emerge in microscopic objects. Nanostructures provide a toolbox and playground for exploring the interesting, strange, and downright bizarre features of quantum mechanics. Our main research themes focus on quantum computing, quantum state transfer, and quantum coherence in solid-state spin systems

Quantum computing

Isolated spins in solid state systems can retain their quantum phase coherence for long times, making them attractive qubits. In fact, single spins can be manipulated with gate fidelities far exceeding the threshold for quantum error correction. We seek to build on these advances by investigating sources of decoherence for spins and inventing new ways to control single- and multi-qubit systems.

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Quantum state transfer

A key requirement for universal quantum computing is the ability to transmit quantum information between qubits. We explore new and interesting ways to transfer quantum states between distant spins, sometimes relying on nothing other than the electrons themselves.

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Many-body quantum coherence

Individual spins in solids can have long coherence times, yet large ensembles of spins, or spin baths, cause decoherence. For example, fluctuating nuclear spins in semiconductors cause dephasing in electron spin qubits. What happens to the coherence of individual spins in large ensembles remains an important question both for quantum information processing and the foundations of quantum mechanics. We are interested in investigating the dynamics of many-body quantum coherence in spin ensembles.

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