Quantum Immortality usually refers to, in a classical sense, a person who is “lucky” enough to survive in any incident in the world. Such a quantity of luckiness is even big enough to keep that person away from the aging of the human body. That is, in fact, when we say that one becomes “immortal”. Throughout the history of the world, there have been many times when people tried to find out the secret of anti-aging, but this ambitious dream, obviously, has failed every time. This paper will discuss quantum immortality in theoretical and mathematical aspects and evaluate its authority, or possibility, of its existence in real life. In order to accomplish this evaluation, the concepts of the main two interpretations of quantum physics: 1)Copenhagen Interpretation(or non-MWI interpretation), and 2)Many Worlds Interpretation(or MWI)will be necessarily involved. Throughout this paper, the MWI is proven to support the theoretical quantum immortal state, which, in this paper, means to achieve an expected theoretical outcome in the Everett box experiment. In order to show how MWI will give its credit to quantum immortality, the idea of the Infinite Monkey experiment is demonstrated in detail. After that, discussions of the computable probability of the outcome of the Infinite Monkey theorem and its pathological distribution are involved. Regardless of the situation in the Everett box, whether it is pathologically distributed or not, the mathematical outcomes show that MWI will be the only possibility of achieving the quantum immortal state during the Everett box experiment, or quantum gun experiment. Finally, the paper brings out the evaluation of quantum immortality in a real life stance.
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