# An arbitrary two-particle high-dimensional Bell state measurement by auxiliary entanglement

## TL;DR

This paper proposes a novel scheme for arbitrary high-dimensional two-particle Bell state measurement using auxiliary entanglement, enabling advanced quantum information processing beyond qubit systems.

## Contribution

It introduces a method to realize high-dimensional Bell state measurement with auxiliary entanglement, including detailed schemes for three and four dimensions and a general formula for any dimension.

## Key findings

- Achieved high-dimensional Bell state measurement using auxiliary entanglement.
- Designed experimental scheme for three-dimensional Bell state measurement.
- Provided a general formula applicable to arbitrary high dimensions.

## Abstract

Bell state measurement (BSM) plays a vital role in quantum information. There are many researches on BSM of qubit Bell state, however, there is no definite solution of how to realize high-dimensional Bell state measurement (HDBSM). In this paper, We present a scheme for realizing arbitrary high-dimensional two-particle Bell state measurement by auxiliary entanglement. In our scheme, the maximal entangled states with different degrees of freedom (DOF) are used as auxiliary states, and then the HDBSM can be achieved by implementing Bell measurement with different degrees of freedom. We present the detailed HDBSM scheme for three and four-dimensional Bell state, and the general formula for arbitrary high-dimensional Bell state. Furthermore, We have designed the experimental scheme for three-dimensional BSM, and given the method of arbitrary dimension. This method can promote the high-dimensional quantum information task.