This paper presents a study on finite-time disentanglement of two entangled qubits due to spontaneous emission. The authors show that under the influence of vacuum noise, two initially entangled qubits become completely disentangled in a finite time. The time to disentanglement is found to be $ \ln\left(\frac{2+\sqrt{2}}{2}\right) $ times the usual spontaneous lifetime. The study considers two two-level atoms coupled to separate cavities, initially in their vacuum states. The total Hamiltonian includes the Hamiltonians of the atoms, the cavities, and their interaction. The master equation for the system is derived, and the solution is expressed in terms of Kraus operators. The local decoherence rates are determined by the real parts of the functions $ F(t) $ and $ G(t) $, while the disentanglement rate is analyzed using Wootters' concurrence. The results show that for certain mixed states, entanglement decays to zero in a finite time, while local decoherence processes take an infinite time. The study highlights the difference between local and non-local decoherence, and shows that spontaneous emission can lead to finite-time disentanglement. The results are significant for understanding quantum information processing and the quantum-classical transition. The paper also discusses the implications of these findings for quantum mechanics and practical quantum information applications.This paper presents a study on finite-time disentanglement of two entangled qubits due to spontaneous emission. The authors show that under the influence of vacuum noise, two initially entangled qubits become completely disentangled in a finite time. The time to disentanglement is found to be $ \ln\left(\frac{2+\sqrt{2}}{2}\right) $ times the usual spontaneous lifetime. The study considers two two-level atoms coupled to separate cavities, initially in their vacuum states. The total Hamiltonian includes the Hamiltonians of the atoms, the cavities, and their interaction. The master equation for the system is derived, and the solution is expressed in terms of Kraus operators. The local decoherence rates are determined by the real parts of the functions $ F(t) $ and $ G(t) $, while the disentanglement rate is analyzed using Wootters' concurrence. The results show that for certain mixed states, entanglement decays to zero in a finite time, while local decoherence processes take an infinite time. The study highlights the difference between local and non-local decoherence, and shows that spontaneous emission can lead to finite-time disentanglement. The results are significant for understanding quantum information processing and the quantum-classical transition. The paper also discusses the implications of these findings for quantum mechanics and practical quantum information applications.