Quantum Theory

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    Matos-Massei – Annulment of Vows

    A story is told about a bachur (an unmarried young man) who came in the 60s to the Lubavitcher Rebbe for the yechidus (private audience) telling the Rebbe that he wanted to go college. Those days, American colleges, by and large, were not exactly institutions of higher learning but, more often, venues for drugs, sex, and rock and roll. The Rebbe strongly advised the visitor against going to college, but the young man was hell-bound on going through with his plan. The Rebbe said to him, “Even if you don’t care about the spiritual dangers and impurity of such a place, I do! And you and I are connected. Why are you dragging me along with you?!” The moral of that story is simple—chasidim and their Rebbe are entangled together. Wherever a chasid [...]

      Tale of Entangled Goats

      And he shall take the two he goats, and place them before the Lord at the entrance to the Tent of Meeting. And Aaron shall place lots upon the two he goats: one lot "For the Lord," and the other lot, "For Azazel." (Leviticus 16:7-8) In the last Torah portion, Metzorah, we learned about two entangled birds. This week, we learn about two entangled goats. I don’t know if these goats studied quantum mechanics, but they can sure teach us a thing or two about quantum entanglement. Entanglement is one of the mysteries of quantum mechanics. On a macro level, entanglement is easy to understand. Imagine a coin sawn into two halves along the plane parallel to the face of the coin. One half has only heads and the other half has only [...]

        Leprous Cats and Angry Birds

        In the Torah portion Tazriah (Leviticus 13), the Schrödinger cat[1] gets leprosy. Well, it’s not really leprosy, it’s a mysterious supernatural disease called tzara’as, nowadays translated as psoriasis. And it’s not a cat, but a Jew who gets afflicted by tzara’as. In fact, cats, other animals, and even gentiles (i.e., non-Jewish humans) are immune to this spiritual malady. So why do I call a poor Jew afflicted with tzara’as a “Schrödinger cat”? Because he sure acts like one. Indeed, had I not studied quantum mechanics and had I not learned about the collapse of the wave function[2] back at the university, I would have surely discovered it by reading this Torah portion (parshah)! A Jewish person with a skin lesion or boldness (present company excluded) is brought to a priest (kohen), who examines it [...]

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