Remove thrust from dependencies of the cpu kernel.

[hzhangxyz]

Description

Checklist:

• I have read the CONTRIBUTING.md.

[Copilot]

Pull Request Overview

This PR removes dependencies on the Thrust library by replacing thrust::sort and thrust::sort_by_key with std::sort, and updates the default comparator in a heap helper from thrust::less to std::less.

• Swapped out Thrust sorting functions for std::sort and updated related code paths
• Removed Thrust includes and updated the heap helper template comparator

Comments suppressed due to low confidence (1)

qmb/_hamiltonian_cpu.cpp:1

• After removing Thrust, you need to add #include <algorithm> (and #include <functional> if std::less isn't already covered) at the top to ensure std::sort and std::less are defined.

#include <torch/extension.h>

[BrevityD]

为什么要remove thrust 啊？看这个库的描述不是比标准库更适合CUDA环境吗？

[hzhangxyz]

为什么要remove thrust 啊？看这个库的描述不是比标准库更适合CUDA环境吗？

@BrevityD 这个cpu的实现和cuda的实现，移除了cpu部分对thrust的依赖，让没有cuda没gpu的机子可以跑。

[BrevityD]

为什么要remove thrust 啊？看这个库的描述不是比标准库更适合CUDA环境吗？

@BrevityD 这个cpu的实现和cuda的实现，移除了cpu部分对thrust的依赖，让没有cuda没gpu的机子可以跑。
Got it.