add requirements

_pages/join-us.md

@@ -17,6 +17,36 @@ If you’re passionate about research along relevant directions and eager to con
 
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+## Requirements
+
+<br>
+
+**Essential Skills:**
+
+1. Familiar with quantum mechanics.
+
+2. Understand fundamental concepts of quantum computing (quantum gates/circuits/measurements/channels/algorithms) and quantum many-body physics (band theory, second quantization, energy spectrum, Hamiltonian evolution, Jordan-Wigner transformation, etc.).
+
+3. Familiar with at least one programming language and know basic concepts of scientific computing.
+
+**Additional Desirable Skills:**
+
+1. Familiar with quantum many-body numerical methods such as quantum Monte Carlo (VMC, SSE, DQMC), tensor network methods (DMRG, MERA, TEBD, TDVP, PEPS), exact diagonalization, mean-field approaches, etc.
+
+2. Familiar with quantum (gauge) field theories or methods and concepts emerged in strongly correlated many-body systems.
+
+3. Familiar with quantum algorithm design (NISQ or fault-tolerant), quantum error correction or mitigation.
+
+4. Familiar with machine learning and scientific computing ecosystem and practice in Python.
+
+5. Familiar with machine learning frameworks such as Jax, TensorFlow, PyTorch and machine learning paradigms such as automatical differentiation, variational optimization, just-in-time compilation, vectorized parallelism, and distributed training.
+
+6. Familiar with engineering tools and paradigms such as GPU, CUDA, C++, HPC, Docker, DevOps, software-engineering, cloud-computing, open-source.
+
+7. Familiar with quantum cloud platforms and quantum software such as TensorCircuit, Qiskit, Cirq, Pennylane, Mitiq, etc.
+
+<br>
+
 ## Contact
 
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