Low-temperature system for integrated quantum nodes based on atom-like systems in nanophotonic cavities
Abstract
Funding is provided for the acquisition of a low-temperature system for integrated quantum nodes based on atom-like systems in nanophotonic cavities, which supports many DoD funded current projects. Developing a reliable interface between photons and quantum emitters is an outstanding challenge in quantum science. Such interfaces are essential for quantum networks and enable quantum devices operating at the single photon level. Despite significant effort, there is no known scalable path to integrated quantum circuits involving coherent qubits coupled through optical photons. The Silicon-Vacancy (SiV) center in diamond has recently emerged as an exceptional platform for realizing quantum nodes. SiV centers have unique properties, including a strong optical transition that is spectrally stable with a narrow inhomogeneous distribution and exhibits lifetime-limited linewidths even inside nanostructures. These optical properties, combined with stable and optically-addressable electronic spin states, make the SiV a prime candidate for realizing scalable nanophotonic quantum devices. For example, we recently demonstrated a quantum optical switch using a single deterministically positioned SiV in a diamond nanophotonic device. The main drawback of SiV centers arises from the spin-orbit coupling that limits their spin coherence times to ?50 ns at T=4 K by a thermal relaxation process. We recently showed that this decoherence rate is proportional to the occupation of 50 GHz (?2 K) phonons. This relaxation can be completely suppressed by operating below 150 mK. We therefore propose to acquire a dilution refrigerator and integrate it with state-of-the-art SiVbased diamond nanophotonic devices. This system will enable groundbreaking experiments in quantum nonlinear optics and scalable quantum networks with applications in fields ranging from quantum information processing to quantum metrology, enabling major advances in DoD programs including AFOSR MURIs “Integrated Hybrid Nano-Photonic Circuits” and “Multifunctional Light-Matter Interfaces based on Neutral Atoms & Solids”, ARO MURIs “Multi-Qubit Enhanced Sensing & Metrology”, and ONR MURI “Quantum Opto-Mechanics with Atoms and Nanostructured Diamond”. In addition, it will enable key research within the ARL “Center for Distributed Quantum Information” and DARPA QuINESS programs.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 23, 2016
- Source ID
- N000141612922
Entities
People
- Mikhail Lukin
Organizations
- Office of Naval Research
- President and Fellows of Harvard College
- United States Navy