Secure entanglement distillation for double-server blind quantum computation

TL;DR

This paper demonstrates that secure entanglement distillation can be achieved in double-server blind quantum computation without compromising the protocol's security, enabling practical implementation in noisy environments.

Contribution

It introduces a method for entanglement distillation in double-server blind quantum computing that maintains security, addressing a key challenge in realistic noisy settings.

Findings

Entanglement distillation can be performed securely in double-server schemes.

The proposed method preserves blindness even after distillation.

Security is maintained without degrading the quantum resources.

Abstract

Blind quantum computation is a new secure quantum computing protocol where a client, who does not have enough quantum technologies at her disposal, can delegate her quantum computation to a server, who has a fully-fledged quantum computer, in such a way that the server cannot learn anything about client's input, output, and program. If the client interacts with only a single server, the client has to have some minimum quantum power, such as the ability of emitting randomly rotated single-qubit states or the ability of measuring states. If the client interacts with two servers who share Bell pairs but cannot communicate with each other, the client can be completely classical. For such a double-server scheme, two servers have to share clean Bell pairs, and therefore the entanglement distillation is necessary in a realistic noisy environment. In this paper, we show that it is possible to perform entanglement distillation in the double-server scheme without degrading the security of the blind quantum computing.