(Quantum Accelerator) Concepts and development of coherent transduction between different qubit technologies
Abstract
Quantum computing is presently undergoing great advances both in industry and academia. Nearly all superconducting experiments in the world and experiments involving low temperature microwave circuitry utilize HEMT amplifiers at 4 K to amplify microwave signals. The signals remain in the microwave domain from room temperature to the 10 mK dilution stage. This requires cryogenic attenuators to prevent noise from reaching the quantum circuits. In addition, heavy attenuation is essential for avoiding thermal contact with the ambient environment. Microwave coaxial cables are excellent microwave and thermal conductors, exposing the refrigerator to significant heating and thus pose a challenge particularly for very complex and high-qubit-number computing systems. IBM, Google, Rigetti and other private companies are currently developing quantum computers with a large number of qubits. As a result, they need a significant number of RF control lines, which increases significantly the heat load on the entire system. In contrast, optical fibers are virtually lossless with significantly more compact size, and most importantly, low thermal conductivity. Moreover, it is promising that a network of quantum computers, with superconducting quantum processors having the capability of remote entangling qubits between quantum computers over large distances, is feasible using optical fibers with optical photons transduced from microwave photons. For these reasons, we propose a new approach for demonstrating a quantum coherent microwave optical frequency transducer based on recent advances that the lab has made in novel integrated photonic devices by combining high overtone bulk acoustic wave resonances (HBAR) with Si3N4 waveguide using electro-acousto-optical interaction. The proposed research will provide a platform for building quantum computers with large numbers of qubits and realizing an optical quantum networks of superconducting processors with the transducers.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502110047
Entities
People
- Tobias Kippenberg
Organizations
- Air Force Office of Scientific Research
- Swiss Federal Institute of Technology in Lausanne
- United States Air Force