Quantum interconnects for neutral atoms
Abstract
We will advance two types of quantum repeater nodes- the first one employing an array of single-atom qubits for processing, storage, and atomic qubit mapping into photons, and the second one using qubits encoded in ensembles of atoms. Both of these approaches will allow for Rydberg-based generation of multi-qubit entangled states, second-time-scale entanglement storage within ground hyperfine manifolds, and efficient generation of atom-light entanglement. Atoms are confined using either optical tweezers or optical lattices that provide state-insensitive potentials for the atomic qubit states. This will allow for controlled preparation of strongly-interacting, many-atom quantum state superpositions and their storage on the timescale of seconds. Using these systems, we will demonstrate new methods of generating and distributing atom-light entanglement. In particular, we will establish the fundamental scientific foundations for light-matter interconnects involving picosecond scale optical pulses and provide specific examples of how such interactions can be used to achieve functionality relevant to quantum networks. The program will demonstrate- 1) reversible quantum state transfer between an atomic array and light fields; 2) qubit state mapping between the array and the ensemble, facilitated by Rydberg interactions; 3) entanglement of nanosecond infrared photons with picosecond telecommunication wavelength photons; 4) entanglement of picosecond telecommunication wavelength photons with long-lived matter qubits; 5) multi-qubit remote entanglement protocols. On the theory side we will use tools from quantum optics and atomic physics such as source-field theory, master equations, quantum trajectories, and quantum algorithms to model and simulate performance and to find optimal geometries and protocol timing sequences for fast entanglement generation and robustness in the presence of experimental errors.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 29, 2024
- Source ID
- FA95502310172
Entities
People
- Alex Kuzmich
Organizations
- Air Force Office of Scientific Research
- Board of Regents of the University of Michigan
- United States Air Force