The hottest Physics Substack posts right now

And their main takeaways
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Today's webinar reminder!

Quantum Formalism • 0 implied HN points • 20 Jan 23
🔬 Science Physics
  1. A webinar on Physics-informed Quantum Communication Networks is happening today.
  2. The webinar starts in about two hours and registration is available on crowdcast.io.
  3. If unable to attend, the recording will be shared on their YouTube channel in the coming days.

Physics-informed Quantum Communication Networks: A Vision Towards the Quantum Internet.

Quantum Formalism • 0 implied HN points • 13 Jan 23
🔬 Science Physics
  1. The webinar focuses on quantum communication networks with an emphasis on physical implementation and the vision of a Quantum Internet.
  2. Interested individuals can register for the webinar using the provided link to learn more about the exciting developments in quantum technology.
  3. Participants are encouraged to share the webinar details with their networks to create an interactive session with a wide audience.

Group theory session 19 invitation

Quantum Formalism • 0 implied HN points • 25 Nov 22
🚌 Education Physics
  1. Live session 19 will cover complex matrix groups like U(n) and SU(n).
  2. The replay of the session will be available on YouTube if you can't attend.
  3. The crash course will conclude with an introduction to group representation theory in the next session.

Group theory course update.

Quantum Formalism • 0 implied HN points • 17 Oct 22
🚌 Education Physics
  1. Learn about the application of group theory in Origami Modular Design from a talk by Bob Miller.
  2. Explore Representation Theory for Geometric Quantum Machine Learning in the upcoming Lie Groups & Representations course.
  3. Discover the lectures on Measure Theory & Functional Analysis available on YouTube, covering topics like real analysis, sigma algebras, measures, and Borel Measures.

Lecture 11 Rescheduled for July 29!

Quantum Formalism • 0 implied HN points • 21 Jul 22
🚌 Education Physics
  1. Lecture 11 has been rescheduled to July 29 due to a disrupted schedule from a heat wave in the UK.
  2. There will be upcoming updates on Measure Theory & Functional Analysis course and community activities.
  3. The sponsor of LOGML Summer School emphasizes the potential benefits of applying modern Geometry to Machine Learning.
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Lecture 04 Invitation

Quantum Formalism • 0 implied HN points • 01 Apr 22
🚌 Education Physics
  1. Attend Bambordé's talk on Abstract Mathematical Structures for Quantum Computing on May 21st at 1:00 PM EDT by registering at the provided link.
  2. Catch up on missed live sessions of the Group Theory Crash Course by accessing the recordings on the YouTube playlist shared.
  3. Join the Discord Community at the provided link to participate in group study sessions and engage with other members.

Lecture 01 Replay

Quantum Formalism • 0 implied HN points • 26 Feb 22
🚌 Education Physics
  1. The lecture was a replay on Group Theory crash course.
  2. Connectivity issues during the live session were faced probably due to a storm in the UK.
  3. Participants were encouraged to join the next live session and a Discord server, and take a short survey on technical background.

Feynman: Mathematicians vs Physicists

Quantum Formalism • 0 implied HN points • 07 Sep 21
🔬 Science Physics
  1. Feynman highlighted the cultural differences between mathematicians and physicists, emphasizing that mathematicians have the freedom to do things their way without criticism.
  2. Feynman's invention of the 'Feynman Path Integral' showcased that innovative techniques can produce results even without strict mathematical rigor.
  3. The talk underlines the importance of individual freedom in pursuing different approaches to problem-solving in science.

Lecture #1 Reschedule

Quantum Formalism • 0 implied HN points • 15 Jun 21
🚌 Education Physics
  1. The first lecture on Topology Crash Course has been rescheduled due to a funeral service on June 25
  2. Alternative dates offered are June 24, June 29, and July 2, all at 5pm BST
  3. Participants are reminded to review basic set-theoretic and real analysis concepts mentioned during the last Q&A session

Module II Prerequisite Schedule

Quantum Formalism • 0 implied HN points • 22 Apr 21
🚌 Education Physics
  1. Module II will likely start on June 25th, with a live session planned for the upcoming Tuesday to discuss the approach and required set-theoretic concepts.
  2. If you can't attend the live session, it will be available later on their YouTube channel, ensuring you don't miss out on important information.
  3. The session will cover the structure and various topics of the prerequisite to prepare quantum enthusiasts for the module, creating an opportunity for learning.

Latest Community updates

Quantum Formalism • 0 implied HN points • 12 Apr 21
🚌 Education Physics
  1. The Lie Theory prerequisite mini-series will focus on point-set topology, metric spaces, and basics of differentiable manifolds.
  2. Reviewing basics of set theory, including intersections, unions, Cartesian products, and maps between sets, is recommended for the upcoming lectures.
  3. While the Lie Theory module may not be sufficient to understand Eric Weinstein's 'Geometric Unity' paper, it provides a foundational knowledge base that can ease the understanding of complex topics in differential geometry and topology.

Lie Theory Module Prerequisite

Quantum Formalism • 0 implied HN points • 30 Mar 21
🚌 Education Physics
  1. Next module's prerequisite sessions are expected to start in June with a focus on Point-Set Topology & Metric Spaces.
  2. Following topics will include Topological Manifolds 101 and Representation Theory 101 before progressing to Lie Theory in Autumn.
  3. An additional free course planned by Zaiku Group later this year will cover Algebraic Topology & Topological Data Analysis, which will overlap with the prerequisite sessions.

Session 15 on YouTube

Quantum Formalism • 0 implied HN points • 16 Jan 21
🔬 Science Physics
  1. Session 15 is now available on YouTube with a fixed typo.
  2. There is a plan to create a mini-lecture series on representation theory after the foundation module and before the advanced module.
  3. The mini-lecture series on representation theory might take place in the summer.

Session 15 Reminder

Quantum Formalism • 0 implied HN points • 14 Jan 21
🚌 Education Physics
  1. The session covers topics like Eigenvectors & Eigenvalues, Spectrum & Eigenspaces, Diagonalization, and The Spectral Theorem for Hermitian matrices.
  2. Newcomers are welcome, but may find it challenging if they haven't covered previous sessions or don't have a background in relevant university-level physics/mathematics.
  3. The upcoming session will focus on Quantum Axioms, the Shut up & Calculate Challenge, and Study Material Comments.

Lecture 14 Invitation

Quantum Formalism • 0 implied HN points • 04 Jan 21
🚌 Education Physics
  1. The invitation for Lecture 14 has been shared with details for the upcoming session.
  2. Newcomers are welcome, but it is advised to have a background in university-level physics and mathematics to follow along effectively.
  3. The registration link for the session is available for those who are interested in attending.

Last 2020 Lecture!

Quantum Formalism • 0 implied HN points • 17 Dec 20
🚌 Education Physics
  1. The last session of 2020 will cover topics like normalised vectors, orthogonal vectors, and orthonormal bases.
  2. The lecture will also discuss topics such as bras, the dual space, and the Riesz Representation Theorem.
  3. Newcomers are welcome to join the lecture, but may find it challenging if they haven't attended previous sessions or lack an advanced background in physics/mathematics.

Lecture 10

Quantum Formalism • 0 implied HN points • 27 Nov 20
🔬 Science Physics
  1. The lecture covers the general linear group GL(2, C) and the special linear group SL(2, C).
  2. Future sessions will discuss the unitary group U(2) and the special unitary group SU(2).
  3. There are concerns about YouTube running ads on videos, potentially leading to removal of lecture videos due to content disagreements and algorithm filtering issues.

Lecture 9 Invite + Nicolas Bourbaki

Quantum Formalism • 0 implied HN points • 10 Nov 20
🔬 Science Physics
  1. Invitations have been sent out for the next live session, so make sure to check your email if you attended the previous one.
  2. There is a group called Nicolas Bourbaki, a secretive math society that has notable members like Jean-Pierre Serre and Alain Connes.
  3. Noncommutative Geometry and C*-algebras, topics linked to physics, will be covered in the advanced module next year.

Influential Mathematicians: Frigyes Riesz

Quantum Formalism • 0 implied HN points • 15 Jul 20
🔬 Science Physics
  1. Frigyes Riesz was a significant mathematician who made key contributions to functional analysis and operator theory, impacting areas like physics and Hilbert spaces.
  2. His work, including the Riesz-Fischer theorem, influenced the development of quantum theory, showing the unitary equivalence of different quantum theories.
  3. Riesz is known for foundational work in Functional Analysis, which is crucial for the mathematical formalism of quantum mechanics, and concepts like Dirac's bracket notation make sense thanks to Riesz representation theorem.

Influential Mathematicians: Emmy Amalie Noether

Quantum Formalism • 0 implied HN points • 29 Jun 20
🔬 Science Physics
  1. Emmy Noether, despite facing discrimination as a woman in academia, made significant contributions to mathematics and physics.
  2. Noether's work in invariant theory and abstract algebra, along with her collaborations, influenced the development of advanced algebraic tools used in treating quantum formalism.
  3. Noether played a mentorship role in shaping the career of another influential female mathematician, Grete Hermann, who made important contributions to the foundations of quantum mechanics.

Influential Mathematicians: David Hilbert

Quantum Formalism • 0 implied HN points • 11 Jun 20
🔬 Science Physics
  1. David Hilbert's contributions to geometry and axiomatic methods influenced mathematics and physics significantly.
  2. Though Hilbert didn't directly work on quantum mechanics, his foundational work on integral equations paved the way for the development of quantum formalism.
  3. Hilbert's interest in applying axiomatic methods to physics led to his famous 'Sixth Problem,' advocating for treating physics with mathematical axioms.

Physics vs Surrealism

Cybernetic Forests • 0 implied HN points • 07 Mar 21
🎨 Art & Illustration Physics
  1. Berenice Abbott used her art to make physics compelling and accessible, rather than using physics to create art.
  2. In the past, there was a fear in the scientific community that public engagement in science would corrupt the purity of science.
  3. Science communication should be seen as a form of research that extends understanding and application of knowledge, not just as PR for scientists.

Cholesterol's Hydroxyl Group

Harnessing the Power of Nutrients • 0 implied HN points • 09 Nov 08
🔬 Science Physics
  1. The hydroxyl group in cholesterol is important because it is polar, having positive and negative poles, and is water-soluble.
  2. Water is a polar molecule due to its hydroxyl groups, demonstrating how opposite charges attract each other.
  3. Cholesterol is an example of an amphipathic molecule, with a water-soluble polar region and a water-insoluble non-polar region.

Atoms and Molecules

Harnessing the Power of Nutrients • 0 implied HN points • 06 Nov 08
🔬 Science Physics
  1. Atoms are the basic building blocks of matter, made up of protons, neutrons, and electrons. They form by balancing positive and negative charges.
  2. Covalent bonds are formed when atoms share electrons to fulfill a full outer shell, creating molecules like water.
  3. Ionic bonding occurs when atoms transfer electrons, resulting in charged ions that stick together oppositely to form compounds like table salt.

$(-1)^2$

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 10 Jan 16
🔬 Science Physics
  1. Imaginary numbers like $i$ are not real because there isn't a real number whose square is -1, pushing the boundaries of mathematical concepts beyond reality.
  2. The rule stating that multiplying two negative numbers results in a positive number, like $(-1) * (-1) = +1$, is a construct by mathematicians to maintain consistency in arithmetic.
  3. Mathematicians create and manipulate rules in pure math to explore interesting results and sometimes stumble upon practical applications, demonstrating the power of abstraction in mathematics.

Thử nghiệm MathJax

Thái | Hacker | Kỹ sư tin tặc • 0 implied HN points • 26 Sep 13
🔬 Science Physics
  1. The author discovered MathJax as a way to write mathematical formulas on the web, finding it visually appealing on Chrome in Linux.
  2. MathJax seemed to not work on Chrome in Android, prompting the author to wonder about its functionality on other platforms and browsers.
  3. The post includes mathematical formulas like Cauchy-Schwarz inequality, Fermat's little theorem, and Euler's beautiful identity, showcasing the use and testing of MathJax for such expressions.

Subroutines Are Not Functions

Paul’s Substack • 0 implied HN points • 02 Jul 24
🕹 Technology Physics
  1. Subroutines are not functions designed to support functional paradigms, but rather to save code space at the cost of extra CPU cycles. They are non-reentrant and not thread safe.
  2. Physics teaches the technique of 'divide and conquer' using simplifying assumptions to focus on areas of interest, pushing aside unnecessary details.
  3. Different problems, involving time like video sequencing, robotics, gaming, etc., may benefit from using programming languages with paradigms other than the function-based one, like Prolog for relational paradigm.

Observers and entropy

Space chimp life • 0 implied HN points • 10 May 24
🔬 Science Physics
  1. Entropy is a way to measure the uncertainty or disorder in a system. It can be understood through different models, and how we define our system affects how we calculate entropy.
  2. The concept of entropy relates to information as well. It’s about how well we can predict outcomes based on the information or 'alphabet' we use to understand a system.
  3. Both living organisms and neural networks try to minimize surprise and uncertainty by adjusting their internal models. This process helps efficiently process energy and information from their environment.

A model for computing goals as signals

Space chimp life • 0 implied HN points • 30 May 23
🕹 Technology Physics
  1. Detecting the position of a particle is crucial, as it helps decide if action is needed or not. A good detection system can distinguish between being inside or outside a boundary.
  2. The effectiveness of an actuator is important too. It should reliably apply force when needed, helping to keep the particle within the desired area.
  3. Adding more detectors and actuators can enhance the chances of success, but they still can't guarantee it. Each added component improves the probability but only approaches success asymptotically.

Physics of intention and action

Space chimp life • 0 implied HN points • 26 Apr 23
🔬 Science Physics
  1. Thought needs to have some effect on the world to be useful. If it doesn't change anything, we can't test or notice it.
  2. Actions often require more energy than the intention behind them. Like how a tiny joystick can move a heavy crane, we need stored energy to make big movements happen.
  3. The energy involved in our actions connects back through history. Every time we move, we are using energy that has been stored and transformed, showing how life's history influences what we do.

Diamonds, Quantum and Beyond

Sector 6 | The Newsletter of AIM • 0 implied HN points • 23 Feb 23
🔬 Science Physics
  1. Diamonds could play a big role in quantum computing, which is very cool because they are not just pretty stones.
  2. Scientists have found that diamonds can hold and preserve quantum states for a while, making them useful for data storage and calculations.
  3. This area of research is still developing, and there’s so much more to discover about how diamonds can be used in technology.

Exploring Time Beyond the Technological Singularity

The Future of Life • 0 implied HN points • 30 Apr 23
🔬 Science Physics
  1. The universe is much older than human civilization, and its history shows a trend of increasing complexity. We might soon face a singularity, which could change everything very rapidly.
  2. After the singularity, the rate of change may slow down due to physical limits. There's a question about whether complexity could reach a peak and stay there for a very long time.
  3. The idea of time might be different if we reach a level of intelligence that allows us to manipulate reality itself. This could lead to a future that is very strange and beyond our current understanding.

Increasing complexity as a fundamental property of the universe

The Future of Life • 0 implied HN points • 10 Apr 23
🔬 Science Physics
  1. The universe naturally trends towards more complex systems. Even when things seem to get simpler, like cleaning a desk, the overall complexity still increases elsewhere.
  2. Simple rules can create complex systems over time, like how stars form and lead to heavier elements. This shows how new complexity builds on what already exists.
  3. As systems develop complexity, they do so faster. For example, it took billions of years for Earth to form, but less time for humans to develop culture and technology.

When the tide goes out

do clouds feel vertigo? • 0 implied HN points • 22 Jan 24
🔬 Science Physics
  1. We all have internal rhythms that control our daily life, like how we breathe and sleep. These rhythms have critical points where they shift from one state to another.
  2. When something shifts between two states, like being calm and angry, it’s similar to how systems in nature move from order to disorder. This helps us understand how change happens.
  3. Counting breaths can help us manage our emotions better. Instead of saying 'I'll see you later,' we can measure time in breaths for more peace and balance.

Discovering the Stratosphere

The Climate Historian • 0 implied HN points • 28 Oct 22
🔬 Science Physics
  1. The atmosphere is crucial for life on Earth. It keeps our planet warm and protects us from harsh conditions.
  2. Léon-Philippe Teisserenc de Bort discovered the stratosphere by launching balloons to measure temperature at high altitudes. This showed that the air doesn't always get colder as you go higher.
  3. Teisserenc de Bort named the layers of the atmosphere, calling the lower part the troposphere, which holds our weather, and the upper part the stratosphere, where the temperature starts to rise due to the ozone layer.

John Tyndall: An Insatiable Thirst For Knowledge

The Climate Historian • 0 implied HN points • 24 Mar 22
🔬 Science Physics
  1. John Tyndall is known for his work on the greenhouse effect, explaining how gases in the atmosphere trap heat and make Earth livable.
  2. His early education came from a Catholic teacher, John Conwill, which greatly influenced Tyndall despite his family's Protestant background.
  3. Tyndall was dedicated to learning, attending lectures and pursuing a Ph.D. in natural sciences, which led him to significant discoveries in physics and chemistry.

Jean-Batiste Joseph Fourier: The Analytical Theory of Heat

The Climate Historian • 0 implied HN points • 18 Mar 22
🔬 Science Physics
  1. Joseph Fourier greatly impacted how scientists understand heat transfer and functions. His work introduced new equations that describe how heat moves through solids.
  2. Fourier was not just a mathematician; he was also deeply involved in the political scene during the French Revolution, even ending up in prison for his beliefs.
  3. In his studies, Fourier explained how the Earth gets its heat from the sun, stars, and its own core. He was one of the first to bring attention to the concept of the greenhouse effect.

Biotech Needs Its Hydrogen Atom

Niko McCarty • 0 implied HN points • 25 May 24
🔬 Science Physics
  1. Biotechnology needs a common foundation, much like how hydrogen is essential to physics. This foundation would help scientists work together more effectively and share their findings.
  2. If scientists could collaborate and understand life better, they could design solutions for diseases and other challenges. This could lead to a future where we have more control over creating living organisms for our needs.
  3. Focusing on studying a simple organism like Mycoplasma genitalium could be key to building this foundation. By deeply understanding it, we could create models that help us predict how other cells function.

Bodies Bodies [3]

The Author Is Dumb • 0 implied HN points • 01 Dec 24
🔬 Science Physics
  1. There is a giant humanoid figure in the stratosphere, which is really huge and looks like a human but we don't know what it's made of. It's just sitting there and not moving at all.
  2. No one knows how this figure got there or if it's dangerous. It might even affect the weather and air travel because it's blocking the sky.
  3. Everyone is puzzled and scared about this thing, and scientists are trying hard to figure out what it is and where it came from. Governments are meeting to plan what to do next.

Harnessing Voltage from a Height

Satisologie: Systems//Creativity • 0 implied HN points • 25 Jan 25
🔬 Science Physics
  1. There is a natural voltage difference in the atmosphere that grows with height, meaning higher points can collect more electricity. It's like how a tall radio tower picks up signals from far away.
  2. You could theoretically collect this energy by hanging a wire high up in the air. The challenge is finding a way to lift that wire without using much energy.
  3. One idea is to use a corkscrew shape in moving water; as the water flows, it could help raise the wire. It’s a mix of creative thinking and natural forces working together.