Laser system for quantum simulation and computation with array of collective Rydberg qubits
Abstract
A major scientific and technological frontier is the creation and manipulation of large quantum systems containing tens to hundreds of quantum bits (qubits) for quantum simulation and quantum computation. Such a platform reaches far beyond what can be simulated on classical computers that are currently limited to systems of about 30 qubits. The application of many-qubit system to problems of relevance in science, technology, and beyond, requires the robust initialization, highfidelity control, and rapid and precise p arallel detection of a large number of qubits. We have recently developed a new platform that can potentially outperform existing s ystems by two to three orders of magnitudes in terms of preparation and detection speed, at system sizes comparable to or larger t han the largest existing platforms. We are requesting a laser system to upgrade existing experiments on cold Rydberg atoms that are supported by DARPA and ARO, and by MURI grants through AFOSR and ARO. Under these grants we have recently developed a novel appro ach to ultrafast preparation and detection of Rydberg qubits. In this system, harnessing collective effects, we have been able to r educe both the preparation and the detection time of single-atom Rydberg qubits by three orders of magnitude. By expanding those c oncepts to large arrays of many traps, and using equipment supplied under this DURIP grant, we will be able to generate and manipul ate large arrays of hundreds of Rydberg qubits, thus providing a new, and potentially very powerful, platform for implementing quan tum simulation and computation. The proposed research is based on several key concepts that have been experimentally demonstrated . Those include arrays of reconfigurable microscopic optical traps, and the implementation of controlled interactions between trapp ed atoms that have been excited to Rydberg states. The most recent technology, developed by our group at MIT in collaboration with Harvard University, is an ultrafast state initialization and detection of Rydberg ensemble qubits with high fidelity, reducing th e preparation and detection times each by three orders of magnitude compared to state-of-the-art schemes. By means of the new laser and optical system requested under this proposal, we will be able to scale the new platform to hundreds of qubits, demonstrate se quences of multi-qubit quantum gates, and perform quantum simulation on interacting manybody systems with unprecedented system size and clock speed. Developing a well-controlled platform to perform many-body quantum manipulations with short cycle times are cent ral to quantum computation and quantum simulation, which are expected to have many applications of interest to DoD. The project wil l provide training for one postdoc, and several graduate and undergraduate students on techniques and technology relevant to DoD ne eds.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 07, 2021
- Source ID
- N000142112880
Entities
People
- Vladan Vuletić
Organizations
- Massachusetts Institute of Technology
- Office of Naval Research
- United States Navy