Entangled graph states
Measurement-based quantum information processing requires the upfront creation of a highly entangled state of qubits, known as graph states,
as they can be represented graphically (the circles denote qubits and the lines denote entanglement). We are interested in the deterministic creation of
photonic graph states for quantum computation and quantum communications using appropriately designed quantum emitters.
Superconducting qubits
Superconducting qubits are currently frontrunners in the quest for quantum computing hardware. One of the challenges they present is their nearly-harmonic
spectrum, which accentuates the inherent competition between spectral selectivity and decoherence. By developing and using quantum control techniques,
we design entangling quantum gates that are both short and of high fidelity.
Driven nonequilibrium spins
Driven nonequilibrium spins exhibit distinct rich physics. The interplay of drive, spin-spin interactions
and interaction with the environment enables phenomena such as dynamic nuclear polarization (DNP). In low-dimensional spin systems such as quantum
dots and two-dimensional systems, DNP can lead to feedback effects on the electron spins. We are interested in developing techniques to describe
the quantum behavior of such systems and to explain and predict experiments.
Spin qubits
Spins in semiconductors, such as defect spins (NV center in diamond, deep centers in silicon carbide) and quantum-dot confined spins
are of interest for quantum information technologies, such as quantum communications, quantum sensing, and quantum computing. We study the
physics of such systems and their interaction with optical and microwave fields, as well as their nuclear spin environment. We are also interested
in spin-photon interfaces and deterministic creation of entanglement.
