News & Events

  • Topological Quantum Matter

    April 1, 2014

    Topological phases of matter are distinguished by a form of quantum order that cannot be characterized in terms of any local order parameter. A most striking manifestation of topological order is the emergence of topologically protected zero-energy boundary modes that are otherwise not realized in Nature. For a topological superconductor, in particular, such emergent quasi-particles coincide with their own anti-particles, naturally embodying elusive quantum objects known as "Majorana fermions".

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  • Many-Body Quantum Chaos and Quantum Thermodynamics

    April 1, 2014

    Understanding and justifying the emergence of equilibrium behavior in generic, non-integrable many-body quantum systems is a longstanding challenge at the very heart of statistical mechanics. We are exploring how concepts and tools from quantum information theory may be used to build a consistent theoretical framework for describing ergodicity and mixing properties in many-body quantum systems that lack a natural classical counterpart, and to characterize distinctive aspects of complex quantum dynamics.

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  • Entanglement and Quantum Correlations

    April 1, 2014

    Entanglement provides a distinctively quantum type of correlation that has no analogue in classical statistical mechanics. Despite much progress, a satisfactory understanding of the nature and properties of quantum correlations in composite quantum systems, and the extent to which different kinds of correlations may be a resource for quantum information tasks is far from being reached.

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  • Dynamics and Control of Open Quantum Systems

    April 1, 2014

    Precisely characterizing and controlling the states and dynamics of realistic open quantum systems is a fundamental challenge across quantum science and engineering, and a prerequisite for harnessing the potential of quantum information processing. We are investigating a range of problems in quantum control from both a general system-theoretic perspective as well as in collaboration with experimentalists working on trapped-ion and solid-state qubit implementations.

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  • Readout of Spin Qubits in Si/SiGe Quantum Dots Using a Cavity Embedded Cooper Pair Transistor

    April 1, 2014

    Spin qubits in Si/SiGe quantum dots are expected to enjoy very long coherence times, due to the weak interaction of the spins with their environment. The same weakness of interaction makes it difficult to determine the state of the qubits, and to transfer the quantum information they contain to other devices. In this project, we plan to use a superconducting device, the Cooper pair transistor, as a charge-tunable inductance that influences the resonant frequency of a superconducting microwave cavity.

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