qutip

# QuTiP: Quantum Toolbox in Python ## Overview QuTiP provides comprehensive tools for simulating and analyzing quantum mechanical systems. It handles both closed (unitary) and open (dissipative) quantum systems with multiple solvers optimized for different scenarios. ## Installation ```bash uv pip install qutip ``` Optional packages for additional functionality: ```bash # Quantum information processing (circuits, gates) uv pip install qutip-qip # Quantum trajectory viewer uv pip install qutip-qtrl ``` ## Quick Start ```python from qutip import * import numpy as np import matplotlib.pyplot as plt # Create quantum state psi = basis(2, 0) # |0⟩ state # Create operator H = sigmaz() # Hamiltonian # Time evolution tlist = np.linspace(0, 10, 100) result = sesolve(H, psi, tlist, e_ops=[sigmaz()]) # Plot results plt.plot(tlist, result.expect[0]) plt.xlabel('Time') plt.ylabel('⟨σz⟩') plt.show() ``` ## Core Capabilities ### 1. Quantum Objects and States Create and manipulate quantum states and operators: ```python # States psi = basis(N, n) # Fock state |n⟩ psi = coherent(N, alpha) # Coherent state |α⟩ rho = thermal_dm(N, n_avg) # Thermal density matrix # Operators a = destroy(N) # Annihilation operator H = num(N) # Number operator sx, sy, sz = sigmax(), sigmay(), sigmaz() # Pauli matrices # Composite systems psi_AB = tensor(psi_A, psi_B) # Tensor product ``` **See** `references/core_concepts.md` for comprehensive coverage of quantum objects, states, operato...