Past Projects

Novel Single Photon Detectors (for QKD)

Fast and efficient photo-detectors for high intensities of light are readily available and used widely in a range of scientific applications. As the intensity of light decreases to extremely low levels, ultimately to single quantized packets of light called photons, detection is realized by specialized devices that often must make a compromise between important characteristics such as high efficiency, high timing resolution, low dark counts, and fast recovery time. In typical single photon detectors only one or two of these attributes can be simultaneously achieved for the wavelength range of interest.

Package-level Integrated Vacuum for On-chip Trapped-ions (PIVOT)

Current implementations of ion-trap quanutm computing are hindered by the need for bulky vacuum chambers, large RF helical resonators and non-scalable free space optics which must accomany a single ion trap processing unit. This project aims to rethink ion trap infrastructure from the ground up for scalability, standardization, and ease of use.

Quantum Computer Performance Simulator

Quantum performance simulators can provide practical metrics for the effectiveness of executing theoretical quantum information processing protocols on physical hardware. We made a scheme to simulate the performance of fault tolerant quantum computation by automating the tracking of common fault paths for error propagation through a circuit and quantifying the fidelity of each qubit throughout the computation.

Scalable Platform for Agile Extended-Reach Quantum Communications (SPARQC)

The Scalable Platform for agule extended-reach quantum communications (SPARQC) program is an effort to make a Quantum repeater node. A quantum repeater node is a scheme for entanglement distriution over a large geographic area.

Superdense Quantum Teleportation

Experimentally, extensive resources are required to teleport an arbitrary quantum state. However, a deterministic (as opposed to probabilistic) protocol called Superdense Quantum Teleportation can send a particular set of quantum states using hyperentangled qubits.

Integrated Optics for Ion Trap Quantum Information Processing

Trapped ions provide an ideal physical system to realize qubits. Well-defined qubits with long coherence times have been demonstrated, along with an efficient way to initialize and measure qubit states. Several schemes for realizing universal set of logic gates have also been proposed and demonstrated. These demonstrations provide a solid platform for constructing a scalable quantum information processor (QIP).

MEMS Technology for Quantum Information Processing in Atomic Arrays

Trapped atomic ions and neutral atoms provide exciting possibilities for realizing scalable quantum information processors (QIPs). The qubit is represented by a pair of internal states of these atoms, and most of the qubit manipulation is performed by using laser beams.