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import numpy as np |
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import pandas as pd |
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import json |
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import os |
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c = 299792458 |
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E_mc2 = c**2 |
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TSR = E_mc2 / (1.38e-23) |
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alpha = 1.0 |
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Q = 2 ** (1 / 12) |
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dark_energy_density = 5.96e-27 |
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dark_matter_density = 2.25e-27 |
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collision_distance = 1e-10 |
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Hubble_constant = 70.0 |
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Hubble_constant_SI = ( |
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Hubble_constant * 1000 / 3.086e22 |
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) |
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temperature_initial = 1.42e32 |
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particle_density_initial = 5.16e96 |
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particle_speed_initial = c |
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t_planck = 5.39e-44 |
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t_simulation = t_planck * 1e5 |
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quark_masses = { |
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"up": 2.3e-3, |
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"down": 4.8e-3, |
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"charm": 1.28, |
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"strange": 0.095, |
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"top": 173.0, |
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"bottom": 4.18, |
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"electron": 5.11e-4, |
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"muon": 1.05e-1, |
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"tau": 1.78, |
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"photon": 0, |
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} |
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GeV_to_J = 1.60217662e-10 |
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num_steps = int(t_simulation / t_planck) |
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tunneling_probabilities = np.arange(0.1, 1.1, 0.1) |
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data_dir = "big_bang_simulation_data" |
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os.makedirs(data_dir, exist_ok=True) |
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def relativistic_energy(particle_speed, particle_mass): |
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if particle_speed >= c: |
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return np.inf |
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return particle_mass * c**2 / np.sqrt(max(1e-10, 1 - (particle_speed / c) ** 2)) |
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def relativistic_momentum(particle_speed, particle_mass): |
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if particle_speed >= c: |
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return np.inf |
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return ( |
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particle_mass |
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* particle_speed |
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/ np.sqrt(max(1e-10, 1 - (particle_speed / c) ** 2)) |
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) |
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def update_speed(current_speed, current_temperature, particle_mass): |
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rel_momentum = relativistic_momentum(current_speed, particle_mass) |
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return c * np.sqrt( |
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max(1e-10, 1 - (rel_momentum / (rel_momentum + dark_energy_density)) ** 2) |
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) |
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for tunneling_probability in tunneling_probabilities: |
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print(f"Simulating for tunneling probability: {tunneling_probability}") |
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particle_speeds = np.zeros((len(quark_masses), num_steps)) |
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particle_temperatures = np.zeros( |
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(len(quark_masses), num_steps) |
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) |
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particle_masses_evolution = np.zeros( |
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(len(quark_masses), num_steps) |
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) |
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tunneling_steps = np.zeros( |
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(len(quark_masses), num_steps), dtype=bool |
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) |
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particle_masses = np.array([mass * GeV_to_J for mass in quark_masses.values()]) |
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for j, (quark, mass) in enumerate(quark_masses.items()): |
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particle_masses_evolution[j, 0] = particle_masses[j] |
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for i in range(1, num_steps): |
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particle_speeds[j, i] = update_speed( |
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particle_speeds[j, i - 1], |
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particle_temperatures[j, i - 1], |
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particle_masses[j], |
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) |
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value = ( |
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1 |
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- (particle_speeds[j, i] / (TSR * temperature_initial)) |
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+ dark_matter_density |
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) |
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if np.random.rand() < tunneling_probability: |
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particle_speeds[j, i] = particle_speeds[j, 0] |
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tunneling_steps[j, i] = True |
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if value < 0: |
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value = 0 |
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particle_temperatures[j, i] = ( |
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alpha * particle_speeds[j, i] ** 2 |
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) |
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speed_squared_diff = ( |
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particle_speeds[j, i] ** 2 - particle_speeds[j, i - 1] ** 2 |
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) |
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if speed_squared_diff == 0: |
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particle_masses_evolution[j, i] = particle_masses_evolution[j, i - 1] |
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else: |
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energy_diff = relativistic_energy( |
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particle_speeds[j, i], particle_masses[j] |
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) - relativistic_energy(particle_speeds[j, i - 1], particle_masses[j]) |
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if abs(energy_diff) < 1e-15: |
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particle_masses_evolution[j, i] = particle_masses_evolution[ |
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j, i - 1 |
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] |
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else: |
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new_mass = ( |
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particle_masses_evolution[j, i - 1] + energy_diff / c**2 |
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) |
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if np.isfinite(new_mass): |
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particle_masses_evolution[j, i] = new_mass |
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else: |
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particle_masses_evolution[j, i] = particle_masses_evolution[ |
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j, i - 1 |
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] |
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particle_speeds[j, i] *= 1 - Hubble_constant_SI * t_planck |
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particle_temperatures[j, i] *= 1 - Hubble_constant_SI * t_planck |
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print( |
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f"Calculated masses at the end of the simulation (Tunneling Probability: {tunneling_probability}):" |
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) |
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for j, quark in enumerate(quark_masses.keys()): |
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print( |
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f"{quark}: {particle_masses_evolution[j, -1] / GeV_to_J:.4e} GeV" |
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) |
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data_filename = os.path.join( |
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data_dir, f"big_bang_simulation_data_{tunneling_probability:.1f}.json" |
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) |
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data = { |
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"tunneling_probability": tunneling_probability, |
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"particle_masses_evolution": particle_masses_evolution.tolist(), |
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} |
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with open(data_filename, "w") as f: |
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json.dump(data, f) |
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