• Rapid progress in building devices that exhibit quantum mechanical behavior at larger length, time, and mass scales suggests that new regimes may soon be accessible for quantum computation, communication, and Heisenberg-limited metrology. We are investigating methods for integrating disparate quantum systems, such as ensembles of atoms and microwave photons, to take best advantage of their good properties while mitigating their intrinsic challenges. This provides novel possible quantum bits and improved sensing of weak electrical and inertial signals, and may lead the way towards the observation of macroscopic quantum behavior.

  • Advances in nonlinear photonics — particularly photons interacting at the single photon level — enable new approaches to quantum simulation and quantum computation in which photons are the primary carriers of quantum information. Of particular interest to our effort are superconducting circuits, which provide a new paradigm for doing quantum simulation and computation with photons in the microwave domain. Our efforts are focused on realizing many-body states of light beyond fractional quantum Hall through these revolutionary new approaches.

  • The coupling between optical and mechanical degrees of freedom at the quantum level leads to novel phenomena such as radiation pressure cooling/amplification and optical spring effect. The back action of photons can also affect the dynamics of the mechanical oscillator dramatically in a regime where the mechanical motion of is comparable to the quantum noise. The understanding and the control of quantum noise in this system is crucial to fundamental study such as the coherence and dynamics of mechanical oscillators and to application such as high precision measurement and quantum information processing.

  • This research work involves the investigation of methods for the coherent manipulation of spins in systems of coupled quantum dots. In particular, we are interested in identifying mechanisms that enable rapid electrical control and entanglement of electron spin qubits. These capabilities are central to the realization of spin-based quantum information processing.

  • We are interested in an alternative approach to circuit-based quantum computation, premised on the notion that simulating interesting Hamiltonian systems can solve challenging computational problems.
    We focuse on a technique for preparing ground states of such Hamiltonians, by simulating their interaction with an infinitely large (yet very simple) 'bath'.