Universal distributed blind quantum computing with solid-state qubits

Area of Science:

• Quantum Information Science
• Quantum Computing
• Quantum Cryptography

Background:

• Blind quantum computing (BQC) allows clients to perform computations on remote quantum servers without revealing their data or algorithm.
• Current BQC implementations often rely on complex superconducting or trapped-ion qubits, posing challenges for scalability and integration.
• Matter-qubit platforms, such as defects in diamond, offer potential advantages in scalability and networking but face hurdles in implementing BQC.

Purpose of the Study:

• To demonstrate a universal set of blind quantum gates using matter qubits.
• To establish a foundation for blind quantum computation in distributed, modular quantum networks.
• To overcome the challenges of implementing BQC on matter-qubit platforms.

Main Methods:

• Utilized silicon-vacancy (SiV) centers in nanophotonic diamond cavities.
• Developed an efficient optical interface for qubit control and readout.
• Implemented single- and two-qubit blind gates over a two-node distributed network.

Main Results:

• Successfully demonstrated a universal quantum gate set for blind quantum computing using SiV centers.
• Executed a distributed algorithm with blind operations across the two-node network.
• Showcased the feasibility of BQC with matter qubits in a networked setup.

Conclusions:

• Blind quantum computation is achievable using silicon-vacancy centers in diamond.
• This work provides a viable route for developing BQC in distributed, modular quantum architectures.
• The demonstrated technology paves the way for secure, remote quantum computation with matter qubits.