Hope the following work:

http://link.springer.com/article/10.1007%2Fs10699-004-6249-7

In quantum mechanics, quantum suicide is a thought experiment, originally published independently by Hans Moravec in 1987 and Bruno Marchal in 1988, and independently developed further by Max Tegmark in 1998.

Unlike the Schrödinger's cat thought experiment which used poison gas and a radioactive decay trigger, this version involves a life-terminating device and a device that measures the spin value of protons. Every 10 seconds, the spin value of a fresh proton is measured. Conditioned upon that quantum bit, the weapon is either deployed, killing the experimenter, or it makes an audible "click" and the experimenter survives.

The theories are distinctive from the point of view of the experimenter only; their predictions are otherwise identical.

The probability of surviving the first iteration of the experiment is 50%, under both interpretations, as given by the squared norm of the wave function. At the start of the second iteration, if the Copenhagen interpretation is true, the wave function has already collapsed, so if the experimenter is already dead, there's a 0% chance of survival. However, if the many-worlds interpretation is true, a superposition of the live experimenter necessarily exists, regardless of how many iterations or how improbable the outcome. Barring life after death, it is not possible for the experimenter to experience having been killed, thus the only possible experience is one of having survived every iteration.[clarification needed] Although such an experience remains possible in the Copenhagen interpretation, it gets less and less likely to happen as the number of iterations gets bigger, whereas it always is certain in the many-worlds interpretation, no matter the number of iterations.

The quantum suicide thought experiment is based on and seeks to prove what has bec­ome an increasingly accepted interpretation of quantum physics, the Many-Worlds theory. This theory was first proposed in 1957 by a doctoral student at Princeton University named Hugh Everett III. The theory was scorned for decades until fellow Princetonian Max Tegman created the quantum suicide experiment, which lends support to the interpretation [source: The Guardian].

According to the Many-Worlds theory, for each possible outcome to an action, the world splits into a copy of itself. This is an instantaneous process Everett called decohesion. It’s kind of like a choose-your-own-adventure book, but rather than choosing between either exploring the cave or making off with the treasure, the universe splits in two so that each action is taken.

One vital aspect of the Many-Worlds theory is that when the universe splits, the person is unaware of himself in the other version of the universe. This means that the boy who made off with the treasure and ends up living happily ever after is completely unaware of the version of himself who entered the cave and now faces great peril, and vice versa.

This is the same case with quantum suicide. When the man pulls the trigger, there are two possible outcomes: the gun either fires or it doesn’t. In this case, the man either lives or he dies. Each time the trigger is pulled, the universe splits to accommodate each possible outcome. When the man dies, the universe is no longer able to split based on the pulling of the trigger. The possible outcome for death is reduced to one: continued death. But with life there are still two chances that remain: The man continues living or the man dies.

When the man pulls the trigger and the universe is split in two, however, the version of the man who lived will be unaware that in the other version of the split universe, he has died. Instead he will continue to live and will again have the chance to pull the trigger. And each time he does pull the trigger, the universe will again split, with the version of the man who lives continuing on, and being unaware of all of his deaths in parallel universes. In this sense, he will be able to exist indefinitely. This is called quantum immortality.

So why aren’t all of the people who have ever attempted to kill themselves immortal? What’s interesting about the Many-Worlds interpretation is that according to the theory, in some parallel universe, they are. This doesn’t appear to be the case to us, because the splitting of the universe isn’t dependent on our own life or death. We are bystanders or observers in the case of another person’s suicide, and as observers we’re subject to probability. When the gun finally went off in the universe -- or version -- we inhabit, we were stuck with that result. Even if we pick up the gun and continue shooting the man, the universe will remain in a single state. After all, once a person is dead, the number of possible outcomes for shooting a dead person is reduced to one.

But the Many-Worlds theory stands in contradiction to another quantum theory, the Copenhagen interpretation. In the next section, we’ll look at this theory and see why it changes the rules of quantum suicide.