Alex

About Alexander Poltorak

Alexander Poltorak was trained as a theoretical physicist in Russia. A physicist and brain researcher, he held academic positions at various colleges and universities serving as an Assistant Professor of Biomathematics at Cornell University Medical College, as an Assistant Professor of Physics at Touro College, as an Adjunct Professor of Physics at the City College of New York. He guest-lectured at Columbia University School of Engineering and Business School. Presently, he is the Founder & President of NeuroLight, Inc. and a Research Fellow at the Institute for Ultrafast Spectroscopy and Lasers. Alex Poltorak authored several books, research papers, and many articles. He blogs about physics, kabbalah and Jewish philosophy.

Relational Space

Relational Space

Meditations on the Maaseh Merkavah – II This post is a sequel to my previous post, “Space – Between Future and Past.” For background information, the reader is referred to that post. My second Shavuot “epiphany” was that space is relational. Not that I realized that space was relational for the first time – I always thought so. But, for some reason, thinking about the meaning of the four faces of Chayot, the "living creatures" – the angelic beings described in the prophecy of Ezekiel that we read on Shavuot – made it absolutely clear in my mind. Isaac Newton The debate about the nature of space goes back at least to the times of Newton and Leibniz. Isaac Newton believed (as it is apparent from his mechanics and as it [...]

By Alexander Poltorak|2020-10-20T00:26:20-04:00June 17th, 2019|Ezekiel, Kabbalah, Mathematics, Mathematics, Names of G‑d, Physics, Relativity, Sefirot, Shavuot, Space, Time, Uncategorized|8 Comments

Space – Between Future and Past

Space – Between Future and Past

Meditations on the Maaseh Merkavah – I We do science by studying nature. We study physics in a lab, peering into space or working out mathematical models with pencil and paper to see if they fit experimental data. However, great mystics of the past were able to see how this world operates by gazing into spiritual worlds above. On Shavuot, the holiday when we celebrate the revelation on Mount Sinai, we read the prophecy of Ezekiel (the First Vision of Ezekiel) called Maaseh Merkavah (or Ma'aseh Merkabah)—Work of the Chariot. Masters of Kabbalah have taught us that understanding the Work of the Chariot gives the initiated an understanding of the works of nature. This Shavuot, studying and thinking about Maaseh Merkavah, I came to understand some profound insights about the physics of space [...]

By Alexander Poltorak|2024-06-09T17:14:43-04:00June 13th, 2019|Ezekiel, Fractals, G‑d, Holidays (Yomim Tovim), Kabbalah, Names of G‑d, Physics, Relativity, Science, Sefirot, Sefirot, Shavuot, Space, Spirituality, Tanakh, Time, Topology, Uncategorized|6 Comments

Ten Sephirot and Special Relativity

Ten Sephirot and Special Relativity

The Special Theory of Relativity, published by Albert Einstein in 1905, was a game changer. It ushered the era of new physics dubbed by some as the “Jewish physics.” And Jewish physics it was. At the core of Special Relativity is the notion of the relativity of motion – all motion is not absolute, as Newton thought, but is relative to something else, to a particular point of view. In physics, we define a point of view as a frame of reference. If you are standing in a moving train, leaving the railroad platform, in your frame of reference (which is always at rest) the train is at rest relative to your frame of reference. The railroad platform, on the other hand, is moving with respect to your frame of reference. For someone [...]

By Alexander Poltorak|2019-06-05T17:55:43-04:00June 2nd, 2019|Kabbalah, Mathematics, Mathematics, Physics, Relativity, Sefirot, Sefirot, Space, Spirituality, Symmetry, Uncategorized|4 Comments

The Entangled Tenth

The Entangled Tenth

And all the tithe of the herd or the flock, whatsoever passeth under the rod, the tenth shall be holy unto the Lord.” (Leviticus 27:32) This Shabbat, I was called up to the Torah for the last aliyah (lit. “ascent”, meaning the reading from the Scroll) of the book of Leviticus. This portion talks about tithing animals, giving the precise procedure for doing so – every animal is released from a pen one by one while being counted – one, two, three, … , ten. The tenth animal is touch by the rode and consecrated as the ma’aser – tithe. The Torah states that every tenth animal is holy unto G‑d. What is the state of the animals before counting? They have two possible states: (1) chulin, i.e., “not sacred” and (2) ma’aser, [...]

By Alexander Poltorak|2019-06-02T11:37:10-04:00June 2nd, 2019|Bechukotai, Collapse of the wavefunction, Entanglement, Leviticus, Parshah, Pentateuch (Chumash), Physics, Quantum Theory, Sefirot, Superposition, Uncategorized, Wavefunction|0 Comments

Unified Field Theory and the Dew of Resurrection

Unified Field Theory and the Dew of Resurrection

And ye shall take you on the first day the fruit of goodly trees, branches of palm-trees, and boughs of thick trees, and willows of the brook (Levit. 23:40) After completing his masterpiece, the General Theory of Relativity in 1916, Albert Einstein spent the rest of his life working fruitlessly on unifying gravity with electromagnetism. His quest was to develop a unified field theory that would unify his General Relativity, a theory of gravitational, with Maxwell electrodynamics. To his great dismay, Einstein never succeeded in developing a unified field theory. It was actually even worse. While working tirelessly on unifying two known classical fields – gravitational field and electromagnetic field – Einstein missed the incredible progress in quantum physics, of which he was one of the founders and for which he received his [...]

By Alexander Poltorak|2019-05-20T03:48:19-04:00May 19th, 2019|Emor, Kabbalah, Leviticus, Mashiach (Messiah), Names of G‑d, Parshah, Pentateuch (Chumash), Physics, Quantum Field Theory, Quantum Theory, Relativity, Resurrection, Sefirot, Sukkot, Uncategorized, Vayikra|4 Comments

Information Asymmetry as a Cause of Antivaxxer Movement

Information Asymmetry as a Cause of Antivaxxer Movement

It’s easy to blame anti-vaxxers. But should we? They come from a good place – they want to protect their children. As parents, we make many mistakes – all in the name of love for our children. Some of us are over-protective, some too strict, others too permissive. Most parents try to mold their children in their own image instead of allowing children to make their own choices and pursue their own talents and passions in life. Parental love is often misguided. However, refusing to vaccinate your children may be one of the most dangerous mistakes parents can make. Many suggested that anti-vaccination movements thrive on conspiracy theories. We find them on the right and on the left extremes of the political spectrum – those on the right mistrust the government, those on [...]

By Alexander Poltorak|2019-05-14T08:27:32-04:00May 13th, 2019|Uncategorized|4 Comments

Adultery and Monogamy of Entanglement

Adultery and Monogamy of Entanglement

And whosoever lieth carnally with a woman, that is a bondmaid, designated for a man, and not at all redeemed, nor was freedom given her; there shall be inquisition; they shall not be put to death, because she was not free. (Lev. 19:20) In Quantum physics there is a principle of monogamy of entanglement, which roughly means that if two particles (or objects) are entangled, neither can be entangled with a third particle (or object). A human parallel to this principle is obvious – if two spouses are married, neither can have any intimate relations with a third person. In other words, a marriage must be monogamous. It is because of this parallel that the physical relationship between entangled particles in quantum mechanics was named the monogamy principle, or monogamy of entanglement. In [...]

By Alexander Poltorak|2019-05-16T07:05:00-04:00May 12th, 2019|Entanglement, Husband and wife, Kedoshim, Leviticus, Parshah, Pentateuch (Chumash), Physics, Quantum Theory, Superposition, Uncategorized, Vayikra|0 Comments

Ye shall be disentangled… but not disengaged

In my post, “Ye Shall be Disentangled,” I suggested that the verse: “Ye shall be holy, for I, the Lord, your G‑d, am holy” (Levit. 19:2) may be interpreted as: “Ye shall be disentangled, for I, the Lord, your G‑d, am disentangled.” I supported this proposition with the quantum monogamy principle (a.k.a. monogamy of entanglement) according to which, if two objects are entangled, neither of them can also be entangled with a third object. Consequently, if we wish to be entangled with G‑d, we cannot also be entangled with the material world, as it would violate the monogamy principle. Thus, we must disentangle from the world, i.e., be holly. One may legitimately object to this interpretation because, in Judaism, we do not have monasteries; we do not have monks, we don't withdraw from [...]

By Alexander Poltorak|2019-05-16T07:34:42-04:00May 8th, 2019|Acharei Mot, Entanglement, Exodus (Shemot), G‑d, Kedoshim, Leviticus, Parshah, Pentateuch (Chumash), Physics, Quantum Theory, Shemot, Spirituality, Uncategorized, Vayikra|1 Comment

Wigner’s Friend Paradox

Wigner’s Friend Paradox

Amicus est Socrates, magister meus, sed magis est amica veritas. “Socrates is my friend but a greater friend is truth” – Plato c. 428-348 BCE. Amicus Plato, sed magis amica veritas. “Plato is my friend, but a greater friend is truth" – Aristotle, Nicomachean Ethics, 350 BCE. Amicus Plato amicus Aristoteles magis amica veritas. “Plato is my friend, Aristotle is my friend, but a greater friend is truth.” – Isaac Newton, Cambridge Student Notebook, 1661 You are my friend, but what is truth? – Eugene Wigner, 1961 If Isaac Newton summed up the aphorisms of Plato and Aristotle in his student notebook, exactly 300 years later, Eugene Wigner put this notion on its head. Although taking a poetic license, I put Wigner's words above in quotation marks, I do not know if he [...]

By Alexander Poltorak|2023-03-23T18:18:41-04:00March 17th, 2019|Uncategorized|4 Comments

The Puzzle of Pi

The Puzzle of Pi

March 14 is celebrated by nerds around the world as the Pi Day. When written in digits, 3/14 represents first three digits of the number traditionally represented by the Greek letter “π” (pronounced pi) – 3.14. Pi Day is celebrated by eating pie and discussing the significance of π. Some folks who have too much time on their hands compete at memorizing decimal digits representing the value of pi. The record presently stands at 67,890 digits! While eating pie is optional, discussing the significance of π is truly mandatory. So, what is π and why is to so important? π is arguably the most famous mathematical constant, expressing the ratio between the circumference of a circle and its diameter. If you take a circle with a diameter of 1, the circumference of this [...]

By Alexander Poltorak|2019-03-14T11:56:19-04:00March 14th, 2019|Mathematics, Mathematics, Physics, Science, Tanakh, Uncategorized|5 Comments

Quantum Torah Film Premiere

Welcome to the premiere of our first film, Quantum Torah. You can watch the film here: https://youtu.be/uTrMj80k6QE Don't forget to subscribe to my channel here: https://www.youtube.com/channel/UCNVwLUClNUXVBqJUI9A47AQ/

By Alexander Poltorak|2019-02-28T17:44:14-05:00February 28th, 2019|Collapse of the wavefunction, Creation, Entanglement, G‑d, Physics, Quantum Theory, Randomness, Resurrection, Science, Soul, Superposition, Uncategorized, Wavefunction, Yom Kippur|1 Comment

Quantum Torah — Film Premiere

Quantum Torah — Film Premiere

I am excited to announce that the premiere of our film "Quantum Torah" is scheduled for this Friday, March 1st. You can see the trailer at https://www.youtube.com/watch?v=uXIq3entXOY&t=1s Not to miss the premiere, subscribe to my channel, Quantum Torah on YouTube at: https://www.youtube.com/channel/UCNVwLUClNUXVBqJUI9A47AQ I look forward to your comments. See you on YouTube!

By Alexander Poltorak|2019-02-24T17:22:20-05:00February 24th, 2019|Collapse of the wavefunction, Entanglement, Physics, Quantum Theory, Randomness, Science, Superposition, Uncategorized|1 Comment

Vectors, Spins, and Gender

Vectors, Spins, and Gender

Vectors, Spins, and Gender Speak to the children of Israel, and have them take for Me an offering; from every person whose heart inspires him to generosity, you shall take My offering. (Ex. 25:2) Every physics professor teaching physics 101 to freshmen spends the first lecture teaching vector algebra. Why vectors are so important? Because most quantities in mechanics (a branch of physics dealing with motion and forces) are vectors. A vector is a mathematical object that has a magnitude and a direction. For example, velocity is a vector – it shows not only how fast the object is moving, but also in what direction it is moving (it is different from “speed” which is an average velocity and is just a number). Similarly, acceleration is a vector, force is a vector, angular [...]

By Alexander Poltorak|2019-02-11T02:25:28-05:00February 10th, 2019|Creation, Exodus (Shemot), Husband and wife, Kabbalah, Mathematics, Mathematics, Parshah, Pentateuch (Chumash), Physics, Quantum Theory, Science, Terumah, Uncategorized|1 Comment

Quantum Torah with Alexander Poltorak film

Coming soon to a theater near you. Watch a trailer: https://youtu.be/Qzr3Ynrpkkk

By Alexander Poltorak|2019-02-02T14:55:48-05:00February 2nd, 2019|Collapse of the wavefunction, Entanglement, Physics, Quantum Theory, Randomness, Resurrection, Science, Shabbat, Soul, Spirituality, Superposition, Wavefunction, Yom Kippur|2 Comments

Fractal Tu B’Shevat

Fractal Tu B’Shevat

When thou shalt besiege a city a long time, in making war against it to take it, thou shalt not destroy the trees thereof by wielding an axe against them; for thou mayest eat of them, but thou shalt not cut them down; for is the tree of the field man, that it should be besieged of thee? (Deut. 20:19) On Tu B’Shevat we celebrate the New Year of the trees. There is much to be said about the legal, ecological, homiletical, and mystical meaning of this day. And, indeed, much has been written about this minor holiday from these perspectives. In this post, however, I’d like to focus on the mathematical and biological aspects of this holiday that, to my knowledge, had not been discussed until now. When the Torah rhetorically asks, [...]

By Alexander Poltorak|2019-01-21T08:54:47-05:00January 21st, 2019|Biology, Fractals, Holidays (Yomim Tovim), Mathematics, Mathematics, Science, Sefirot, Tu B'Shvat, Uncategorized|1 Comment

About Midnight

About Midnight

And Moses said: “Thus saith the Lord: About midnight will I go out into the midst of Egypt; and all the first-born in the land of Egypt shall die, from the first-born of Pharaoh that sitteth upon his throne, even unto the first-born of the maid-servant that is behind the mill; and all the first-born of cattle. (Ex. 11:4-6) In the original verse, in Hebrew, Moses uses an unusual expression “k’hatzot halayalah.” The normal way of saying would be, “hatzot halailah” – at the midnight. (in Heb. laila means “night,” and hatzot means “the middle,” i.e., the middle of the night, or midnight.) However, the verse says, “k’hatzot halayalah.” Every commentator struggles with the addition of “k” before “hatzot.” Grammatically, the prefix “k” in Heb. is called kaf hadimiyan and signifies a likeness or [...]

By Alexander Poltorak|2019-01-15T09:57:44-05:00January 15th, 2019|Uncategorized|0 Comments

Chanukah Menorah – the River of Time

Chanukah Menorah – the River of Time

In a Kabbalistic meditation on lighting Chanukah Menorah, the Arizal links the menorah lights with a supernal river (see Candle on the River). The Arizal’s principal disciple, Rabbi Chaim Vital, writes: One should meditate on the idea that the initials of the words "…l'hadleek ner Chanukah [to light the Chanukah candle] are the holy name called "Nachal."Shaar HaKavanot, Inyan Chanukah The first letters of the words “l'hadleek ner Chanukah” are three letters, Lamed (L), Nun (N), and Chet (Ch). Rearranged, these letters spell the word NaChaL, that is, a stream or a small river. As I wrote in my essays, “On the Nature of Time and the Age of the Universe,” and “Joseph—the Master of Time,” a river has been the metaphor for time across many cultures. Does this Kabbalistic meditation hints at a connection between Chanukah lights and [...]

By Alexander Poltorak|2021-12-03T12:57:08-05:00December 9th, 2018|Chanukah, Cosmology, Creation, Holidays (Yomim Tovim), Relativity, Space, Time, Uncategorized|3 Comments

Jacob Meets Esau and His 400 Men

Jacob Meets Esau and His 400 Men

And the messengers returned to Jacob, saying: “We came to thy brother Esau, and moreover he cometh to meet thee, and four hundred men with him.” (Genesis 32:7) Why does the Torah take pains to tell us the exact number of men accompanying Esau? Servants of Esau are of no particular significance. It is apparent that, by specifying the number of men in Esau's entourage, the Torah is trying to tell us something about Esau. It seems to me that Jacob understood the significance of the number 400. This number is a sum of the powers of 7 from 0 to 3: 70+71+72+73=400. These four powers of 7 hint at the lunar month, which has approximately 28 days (4×7). The significance of this will become apparent later. 400 is a repdigit (a portmanteau [...]

By Alexander Poltorak|2020-12-09T21:07:14-05:00November 22nd, 2018|Bereshit, Genesis, Mathematics, Parshah, Pentateuch (Chumash), Uncategorized, Vayishlach|4 Comments

The Meaning of Life as Taught by Bayesian Angels

The Meaning of Life as Taught by Bayesian Angels

November 19, 2018 And he [Jacob] dreamed, and behold! a ladder set up on the ground and its top reached to heaven; and behold, angels of G‑d were ascending and descending upon it. (Genesis 28:12) Rabbi Shneur Zalman of Liadi (a.k.a Baal HaTanya, or the Alter Rebbe) once remarked in Yiddish, “lieben mit di tzait” – live with the time, meaning one should live with Torah portion of the week. Last week I was taught a lesson on how the current Torah portion affects my thinking, whether I know it or not. Last week I shared with my wife, who is a biophysicist, that while thinking about system biology, I realized that all organisms – from a single cell to multicellular organisms – are Bayesian systems. I knew that the brain is a [...]

By Alexander Poltorak|2024-01-07T17:25:24-05:00November 19th, 2018|Bereshit, Biology, Dreams, Genesis, Mathematics, Mathematics, Neuroscience, Parshah, Pentateuch (Chumash), Science, Uncategorized, Vayetze|1 Comment

Jacob Teaches Wave-Particle Duality

Jacob Teaches Wave-Particle Duality

…and he [Jacob] took some of the stones of the place and placed [them] at his head, and he lay down in that place (Gen. 28:11) And Jacob arose early in the morning, and he took the stone that he had placed at his head, and he set it up as a monument, and he poured oil on top of it. (Gen. 28:18) And Jacob said to his kinsmen, "Gather stones," and they took stones and made a pile, and they ate there by the pile. (Gen. 31:46) The debate about the nature of matter goes back to antiquity. According to atomist school of thought (Leucippus, Democritus, Epicurus, Lucretius), the matter is composed of particles or atoms. The light was also thought to be made of particles – the corpuscular theory of light (Alhazen, Newton). [...]

By Alexander Poltorak|2018-11-18T16:14:56-05:00November 18th, 2018|Uncategorized|2 Comments

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