Demonstration of a general fault‐tolerant quantum error detection code for (2 n  + 1)‐qubit entangled state on IBM 16‐qubit quantum computer

Abstract

Quantum error detection has always been a fundamental challenge in a fault-tolerant quantum computer. Hence, it is of immense importance to detect and deal with arbitrary errors to efficiently perform quantum computation. Several error detection codes have been proposed and realised for lower number of qubit systems. Here we present an error detection code for a (2n + 1)-qubit entangled state using two syndrome qubits and simulate it on International Business Machines 16-qubit quantum computer for a 13-qubit entangled system. The code is able to detect an arbitrary quantum error in any one of the first 2n qubits of the (2n + 1)-qubit entangled state and detects any bit-flip error on the last qubit of the (2n + 1)-qubit entangled state via measurements on a pair of ancillary error syndrome qubits. The protocol presented here paves the way for designing error detection codes for the general higher number of entangled qubit systems.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Circuit centric quantum architecture design

“…All current architecture designs require a 2D arrangement [9,10] of qubits with the nearest-neighbour interactions, compatible with powerful quantum error correction using the surface code. Several realistic experiments in the field of quantum computation, including quantum simulation [11][12][13][14][15][16] developing quantum algorithms [17][18][19], testing of quantum information-theoretical tasks [20][21][22], and quantum error correction [23,24] have been performed owing to the development of quantum chips.…”