Optical Network Dynamics and Synchronization with Entangled Photons
Abstract
Trapped ions are currently some of the best quantum memories available, with coherence times exceeding tens of minutes. A chain of ions in a trap can store tens to possibly hundreds of qubits and implement extremely complex quantum algorithms. But connecting these chains into a network requires complex photonic interconnects.We propose to develop a lab scale quantum network composed of two spatially separated ion chambers connected by integrated photonic devices. We will construct a second ion trap chamber to interface with our existing system over photonic links. The two chambers will constitute two nodes of a quantum network that will interact via photons that we will process using compact integrated photonic devices. A pulsed laser excitation system will optically excite individual ions to create photons that we will collect using a custom designed high numerical objective lens. We will also acquire a high efficiency photon detection system and timing electronics to perform photon correlation measurements that implement long distance entanglingoperations on ions in different traps. The proposed system will serve as a unique testbed for testing a variety of quantum protocols. We will focus on interactive protocols used to verify and authenticate quantum computation and implement secure and anonymous measurement independent quantum network protocols as well as scalable quantum repeaters. We will test delegated quantum computing algorithms that enable one party in a quantum network to borrow the resources of a second party to perform quantum computation with verified authenticity. We will also explore methods forsecret sharing and anonymous communication enabled by long-distance shared entanglement.Ultimately, we can begin to explore the powerful concept of combining many small quantum computers into a much bigger and more powerful distributed quantum computer using photonic channels. This approach could ultimately provide a path towards scalable quantum computing. The proposed equipment will support a number of DoD funded projects including anAFOSR funded MURI on ~Scalable certification of quantum computing devices and networks~,an AFOSR funded grant on ~Non-Local Quantum Interactions Using Trapped Ions and Integrated Photonics~, and the Center for Distributed Quantum Information funded by ARL. The DURIP will also provide essential equipment for graduate and undergraduate students to perform research.Our work will have strong overlap with the mission of surrounding research labs including ARL, NRL, AFRL, LPS, and NIST, many of which are in close proximity to the University of Maryland. We are already engaged in multiple collaborations with researchers in all these laboratories. We will make the new facilities available to researchers in these labs, thereby enhancing collaborationwith UMD.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 13, 2019
- Source ID
- N000141912389
Entities
People
- Rajarshi Roy
Organizations
- Office of Naval Research
- United States Navy
- University of Maryland