#quantummechanics — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #quantummechanics, aggregated by home.social.
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https://www.europesays.com/uk/1195634/ Meet Rachel Chen, the 18-year-old Los Angeles student who expanded a 1997 quantum-math idea to describe entire particle systems with simple diagrams; she won $100,000 #LosAngelesStudent #Physics #QuantumMathematics #QuantumMechanics #QuantumParticles #QuantumPhysics #RachelChen #RegeneronScienceTalentSearch2026 #Science #SpinRepresentation #TemperleyLiebAlgebra #TemperleyLiebDiagrams #UK #UnitedKingdom
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Physicists Find Useful Energy Hiding in Quantum “Waste Heat”
An atom in a cavity between two mirrors (left) acts as a heat engine in a driven-dissipative quantum…
#NewsBeep #News #Physics #AU #Australia #QuantumMechanics #QuantumPhysics #quantumtechnology #Science #Thermodynamics #UniversityofBasel
https://www.newsbeep.com/au/885958/ -
Physicists Find Useful Energy Hiding in Quantum “Waste Heat”
An atom in a cavity between two mirrors (left) acts as a heat engine in a driven-dissipative quantum…
#NewsBeep #News #Physics #AU #Australia #QuantumMechanics #QuantumPhysics #quantumtechnology #Science #Thermodynamics #UniversityofBasel
https://www.newsbeep.com/au/885958/ -
Meet Rachel Chen, the 18-year-old Los Angeles student who expanded a 1997 quantum-math idea to describe entire particle systems with simple diagrams; she won $100,000
Rachel Chen…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #LosAngelesstudent #quantummathematics #QuantumMechanics #quantumparticles #QuantumPhysics #RachelChen #RegeneronScienceTalentSearch2026 #Science #spinrepresentation #Temperley-Liebalgebra #Temperley-Liebdiagrams
https://www.newsbeep.com/us/841919/ -
Meet Rachel Chen, the 18-year-old Los Angeles student who expanded a 1997 quantum-math idea to describe entire particle systems with simple diagrams; she won $100,000
Rachel Chen…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #LosAngelesstudent #quantummathematics #QuantumMechanics #quantumparticles #QuantumPhysics #RachelChen #RegeneronScienceTalentSearch2026 #Science #spinrepresentation #Temperley-Liebalgebra #Temperley-Liebdiagrams
https://www.newsbeep.com/us/841919/ -
Meet Rachel Chen, the 18-year-old Los Angeles student who expanded a 1997 quantum-math idea to describe entire particle systems with simple diagrams; she won $100,000
Rachel Chen, 18, won $100,000 for her …
#NewsBeep #News #Physics #LosAngelesstudent #quantummathematics #QuantumMechanics #quantumparticles #QuantumPhysics #RachelChen #RegeneronScienceTalentSearch2026 #Science #spinrepresentation #Temperley-Liebalgebra #Temperley-Liebdiagrams #UK #UnitedKingdom
https://www.newsbeep.com/uk/765168/ -
Meet Rachel Chen, the 18-year-old Los Angeles student who expanded a 1997 quantum-math idea to describe entire particle systems with simple diagrams; she won $100,000
Rachel Chen, 18, won $100,000 for her inno…
#NewsBeep #News #Physics #AU #Australia #LosAngelesstudent #quantummathematics #QuantumMechanics #quantumparticles #QuantumPhysics #RachelChen #RegeneronScienceTalentSearch2026 #Science #spinrepresentation #Temperley-Liebalgebra #Temperley-Liebdiagrams
https://www.newsbeep.com/au/885772/ -
Meet Rachel Chen, the 18-year-old Los Angeles student who expanded a 1997 quantum-math idea to describe entire particle systems with simple diagrams; she won $100,000
Rachel Chen, 18, won $100,000 for her inno…
#NewsBeep #News #Physics #AU #Australia #LosAngelesstudent #quantummathematics #QuantumMechanics #quantumparticles #QuantumPhysics #RachelChen #RegeneronScienceTalentSearch2026 #Science #spinrepresentation #Temperley-Liebalgebra #Temperley-Liebdiagrams
https://www.newsbeep.com/au/885772/ -
Physicists Find Useful Energy Hiding in Quantum “Waste Heat”
An atom in a cavity between two mirrors (left) acts as a heat engine in a driven-dissipative quantum…
#NewsBeep #News #Physics #QuantumMechanics #QuantumPhysics #quantumtechnology #Science #Thermodynamics #UK #UnitedKingdom #UniversityofBasel
https://www.newsbeep.com/uk/764826/ -
Physicists Find Useful Energy Hiding in Quantum “Waste Heat”
An atom in a cavity between two mirrors (left) acts as a heat engine in a driven-dissipative quantum…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #QuantumMechanics #QuantumPhysics #quantumtechnology #Science #Thermodynamics #UniversityofBasel
https://www.newsbeep.com/us/841471/ -
Physicists Find Useful Energy Hiding in Quantum “Waste Heat”
An atom in a cavity between two mirrors (left) acts as a heat engine in a driven-dissipative quantum…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Physics #QuantumMechanics #QuantumPhysics #quantumtechnology #Science #Thermodynamics #UniversityofBasel
https://www.newsbeep.com/us/841471/ -
https://www.europesays.com/uk/1194638/ Physicists Find Useful Energy Hiding in Quantum “Waste Heat” #Physics #QuantumMechanics #QuantumPhysics #QuantumTechnology #Science #thermodynamics #UK #UnitedKingdom #UniversityOfBasel
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https://www.europesays.com/ch/127947/ Physicists Find Useful Energy Hiding in Quantum “Waste Heat” #Basel #QuantumMechanics #QuantumPhysics #QuantumTechnology #thermodynamics #UniversityOfBasel
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Semiconductor Physics by P.S. Kireev
This textbook originates from lectures delivered by the author to students of the Semiconductor Materials and Devices Faculty at the Moscow Institute of Steel and Alloys. It assumes prior knowledge of subjects like Crystallography and Quantum Mechanics, allowing the material to focus exclusively on semiconductor physics without revisiting crystal lattice structures or atomic bonding. Leveraging students’ understanding of quantum mechanics, the textbook employs rigorous methods to address topics such as energy band structures and charge carrier transitions, including their interactions with lattice defects, phonons, and photons. Detailed intermediate calculations and experimental data further enhance comprehension.
While the material is presented at a high level, it remains accessible, supported by clear derivations and illustrations. Group theory methods are introduced to simplify problem-solving but are confined to an appendix, as this subject is typically not part of technical college curricula. The book deliberately avoids covering the operation of specific semiconductor devices, treating Semiconductor Physics as a distinct discipline with a focus on fundamental principles.
Translated from the Russian by Mark Samokhvalov
All credits to the original uploaders, this is an optimised pdf.
You can get the book here and here
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CONTENTS
Preface 9Chapter I. Introduction. Electron Theory of Conductivity 11
Electron Theory of Conductivity. Ohm’s Law 11
Mean-Free Time and Free-Path Distribution Functions 16
Electron Distribution Function. Mean Values of Physical Quantities 20
Semiconductors. The Classification of Materials According to Their Conductivity 31
Semiconductor Conductivity Models. The Concept of a Hole 35
Intrinsic and Extrinsic Conductivities 39
Chapter II. The Fundamentals of the Band Theory of Semiconductors 42
7. The Schrödinger Equation for the Crystal 42
8. The Adiabatic Approximation 45
9. Single Electron Approximation 50
10. Periodic Field of the Crystal Lattice. Translational Operator 54
11. Quasimomentum 59
12. The Effective Mass of the Electron 64
13. Relation Between Velocity and Quasimomentum 70
14. Acceleration Operator 73
15. Brillouin Zones 80
16. Normalising Inside a Potential Box and the Discrete Nature of Quasimomentum 85
17. Theory of the Quasifree Electron 90
18. Theory of the Quasibound Electron 105
19. Effective Mass Method. Influence of External Fields on Energy Spectrum of a Crystal 119
20. Localised States 125
21. Elementary Theory of Impurity States 130
22. Surface States 138
23. Quantisation of Electron Energy in a Magnetic Field. Landau Levels 141
24. Pauli Principle. Concept of Metal, Semiconductor, and Dielectric 146
25. Main Features of the Hole 153
26. Band Structure of Some Semiconductors. Calculation Methods 158
27. Quasiparticle Concept 175Chapter III. Electron and Hole Statistics in Semiconductors 180
28. Density of States 180
29. Electron and Hole Concentrations 189
30. Electric Neutrality Equation 197
31. Intrinsic Semiconductor 200
32. Extrinsic Semiconductor. Impurity of One Type 205
33. Semiconductor Doped with Both Acceptor and Donor Impurities 215
34. Degenerate Semiconductor 221
35. Density of States in a Magnetic Field 225Chapter IV. Kinetic Phenomena in Semiconductors 234
36. Boltzmann’s Kinetic Equation 234
37. Relaxation Time 241
38. Electric Current Density and Energy Flux Density 249
39. Kinetic Coefficients 253
40. Conductivity of Semiconductors 261
41. Galvanomagnetic Effects 270
42. Hall Effect in Extrinsic Conductivity Range 280
43. Hall Effect in a Substance with Several Types of Charge Carriers 288
44. Magnetic Field Dependence of Hall Coefficient 294
45. Magnetoresistive Effect 302
46. Heat Conductivity of Semiconductors 311
47. Thermoelectric Phenomena 318
48. Thermomagnetic Phenomena 334
49. General Analysis of Kinetic Phenomena 338
50. On Kinetic Phenomena in Semiconductors with Tensor Effective Masses 348
51. Tensorsensitive Effect. Tensorsensitivity 352
52. Piezoresistive Effect. Piezoresistance Coefficients 359Chapter V. The Theory of Charge Carrier Scattering 369
53. Effective Scattering Cross Section 369
54. Relationship Between Relaxation Time and Effective Cross Section 378
55. Elements of Quantum Transition Theory 383
56. Impurity Ion Scattering 390
57. Scattering by Neutral Impurity Atoms 398
58. Lattice Vibrations. Normal Coordinates, Phonons 401
59. Acoustical and Optical Lattice Vibrations 409
60. Lattice Specific Heat. Phonon Statistics 422
61. Scattering by Thermal Lattice Vibrations. Method of Deformation Potential 432
62. Temperature Dependence of Charge Carrier Mobility 441
63. Dependence of Relaxation Time on External Fields. Deviations from Ohm’s Law 452Chapter VI. Charge Carrier Recombination 461
64. Continuity Equation. Lifetime 461
65. Recombination Mechanism. Linear Recombination 472
66. Diffusion and Drift of Nonequilibrium Charge Carriers 484
67. Surface Recombination 492Chapter VII. Contact Phenomena in Semiconductors 497
68. Debye Length 497
69. Work Function 510
70. Contact Potential Difference. Metal-Metal Contact 515
71. Metal-Semiconductor Contact 519
72. Inhomogeneous Semiconductor, p-n Junction 525Chapter VIII. Optical and Photoelectrical Phenomena in Semiconductors 532
73. Light-Absorption Spectrum 532
74. Light Absorption by Free Charge Carriers 536
75. Cyclotron Resonance 546
76. Intrinsic Light Absorption 555
77. Absorption of Light by the Lattice 573
78. Light Absorption by Electrons in Localised States 579
79. Influence of the Ambient on Absorption Spectrum 586
80. Photoresistive Effect 590
81. Dember Effect. Photovoltaic Effect 599
82. Photomagnetoelectric Effect 608
83. Faraday Effect 613
84. Spin-Orbital Splitting of Energy Bands 623Appendix. Introduction to the Theory of Groups 633
Space Transformations 633
Group of Symmetry Transformations. Properties of Group Elements 639
Relation Between Groups 643
Representation of Groups 646
The Properties of Irreducible Representations 649
The Basis of a Representation 652
Direct Product of Representations 655
Point Groups 659
Translational Groups. Brillouin Zones 665
The Wave Vector Group 671
Schrödinger Equation 680
Twin Groups. Time Inversion 684
Recommended Literature 694
#physics #quantumMechanics #semiconductors #sovietLiterature -
АНТРОПОЛОГИЯ, ANTHROPOLOGY, АНТРОПОЛОГІЯ
#АНТРОПОЛОГИЯ, #ANTHROPOLOGY, #АНТРОПОЛОГІЯ
t.me/scilib_yura15cbx/542Thermodynamics, statistical physics
Термодинамика, статистическая физика
Термодинаміка, статистична фізика
#Thermodynamics, #statistical physics
#Термодинамика, #статистическаяфизика
#Термодинаміка, #статистичнафізика
t.me/scilib_yura15cbx/541PQm Quantum mechanics
Квантовая механика
Квантова механіка
#Quantum mechanics
#Квантоваямеханика
#Квантовамеханіка
t.me/scilib_yura15cbx/540PQft Quantum field theory
Квантовая теория поля
Квантова теорія поля
#Quantum field theory
t.me/scilib_yura15cbx/539Фазовые переходы
Phase_transitions, Фазовіпереходи
#Фазовые переходы
#Phase transitions, #Фазовіпереходи
t.me/scilib_yura15cbx/538Пиротехника, Піротехніка, Pyrotechnics
#Пиротехника, #Піротехніка, #Pyrotechnics
t.me/scilib_yura15cbx/537Астрономия, Астрономія, Astronomy
#Астрономия, #Астрономія, #Astronomy
t.me/scilib_yura15cbx/536PPop Popular-level
Популярная физика
Популярна Фізика
t.me/scilib_yura15cbx/535PG General courses
Общие курсы
Загальні курси
t.me/scilib_yura15cbx/534PPl Plasma Плазма
Физика плазмы
#Plasma #Плазма
#Физика плазмы
t.me/scilib_yura15cbx/533PPh Philosophy of Physics
Философия физики,
Філософія фізики
t.me/scilib_yura15cbx/532POs Oscillations and waves
Колебания и волны
Коливання і хвилі
t.me/scilib_yura15cbx/531PNu Nuclear Physics
Ядерна фізика
Ядерная физика
#Nuclear Physics
#Ядернафізика
#Ядернаяфизика
t.me/scilib_yura15cbx/530PNc Nonlinear chaos
Нелинейный хаос
Нелінійний хаос
#Nonlinear chaos
#Нелинейныйхаос
#Нелінійнийхаос
t.me/scilib_yura15cbx/529PM Atomic Molecular and Optical Physics
Атомна молекулярна та оптична Фізика
Атомная молекулярная и оптическая физика
t.me/scilib_yura15cbx/528PGrc Cosmology
Космология
Космологія
#Cosmology
#Космология
#Космологія
t.me/scilib_yura15cbx/527PGr Gravitation
Гравитация
Гравітація
#Gravitation
#Гравитация
#Гравітація
t.me/scilib_yura15cbx/526PGe Encyclopaediae physics
Енциклопедія
Энциклопедии
t.me/scilib_yura15cbx/525PE Electromagnetism
Електромагнетизм
Электромагнетизм
#Electromagnetism
#Електромагнетизм
#Электромагнетизм
t.me/scilib_yura15cbx/523PD Dynamical systems
Динамические системы
Динамічна система
t.me/scilib_yura15cbx/522PCh Chemical physics
Хімічна фізика
Химическая физика
#Chemical physics
#Хімічнафізика
#Химическаяфизика
t.me/scilib_yura15cbx/521PCtm Theoretical mechanics
Теоретическая механика
Теоретична механіка
t.me/scilib_yura15cbx/520PCstr Special relativity
Спеціальна теорія відносності
Специальная теория относительности
t.me/scilib_yura15cbx/519PCft Classical fields
Классические поля, классическая теория поля, класична теорія поля
t.me/scilib_yura15cbx/518 -
COW DISTINGUISHES SQPR FROM PENROSE’s Gravitational Localization:
COW Experiment Potentially DISTINGUISHES SQPR
In the 1970s I told Sir Roger Penrose (among others at Stanford) about the basic idea of SQPR. Penrose published in the 1980s the Gravitationally Induced Spontaneous Localization theory which applies the time-energy uncertainty (TEU) relation to spacetime. The two Objective Reduction theories are very different, because they have different collapse mechanisms.
In particular at cosmological scale, SQPR predicts observed facts, such as Dark Matter and Dark Energy, whereas the Penrose theory does not.
The theories also make very different predictions in the lab relative to Quantum Mechanics, and also relative to each other. Let’s explore.
***
Diósi-Penrose Objective Reduction (DPOR) model is a hypothesis proposing that quantum wavefunctions collapse spontaneously due to gravitational instabilities caused by mass superposition. It has the advantage of tying in gravity and Quantum Mechanics (QM) in the simplest manner.
Core Concepts
- Gravity and Superposition: When a massive object exists in a superposition of two different locations, the distribution of its mass creates a simultaneous superposition of two distinct spacetime geometries. (At least that’s what the formalism of Quantum Mechanics predicts!) [1, 2]
- Spacetime Conflict: General relativity requires a single, well-defined spacetime metric, creating a fundamental clash with quantum superposition. [1]
- Objective Reduction: Rather than needing an external observer or measurement to trigger a collapse, gravity forces the system to resolve itself into a single state. [1, 2]
- Timescale: The lifetime of the superposition is inversely proportional to the gravitational self-energy difference between the states. The exact expression obtained by applying the TEU. The duration until collapse is inversely proportional to the difference in gravitational energy between the two different locations (and proportional to Planck constant, of course! It’s direct TEU!)
***
In the Colella-Overhauser-Werner (COW) experiment, realized in 1975, thermal neutrons enter a silicon crystal Mach–Zehnder interferometer. When the interferometer is tilted by an angle theta relative to the horizontal, one arm (Path A) is at a higher gravitational potential than the lower arm (Path B).
It turns out that the energy of the quantum state in the upper branch, Path A, is different in composition from that of the lower branch, Path B. This can be physically demonstrated through the apparition of shifting interference fringes. The effect has been observed.
The reasoning is fascinating: one makes a number of assumptions, simplest and most natural. Those assumptions bring us to a shifting interference pattern shifting in a peculiar way, which is observed. Therefore one is entitled to deduce that the assumptions made were correct, and this tells us many things about matter waves.and in particular how long the guiding waves are. It may also enable to demonstrate in the lab the existence of Objective Reduction theories, which extend understanding beyond Quantum Mechanics.
***
Penrose’s Model Makes Experimental Predictions:
If one plugs the usual numbers in, considering self-gravitation of the neutron, one gets millions of years for Penrose collapse to happen.
However for a single neutron interacting with Earth’s massive gravitational field, going both down a ground branch of the interferometer (B) and the elevated one (A), the difference in gravitational energy is mgh, where g is the usual gravitational acceleration at sea level, m is the mass of the neutron, and h is how high A is above B.
If we extend the COW experiment using large molecules (like fullerenes or 10^4 atoms macromolecular clusters) or Bose–Einstein Condensates (BECs) instead of single neutrons, mgh scales up by 10^4 to $10^6. Then the collapse time drops precipitously from millions of years to milliseconds or microseconds—falling right inside the passage duration of the experiment!
https://quantumnano.at/research/universal-matter-waves/why-matter-waves
***
Penrose does not suggest a plausible mechanism to cause collapse.
DPOR is a particular case of Objective Reduction (OR) models, where one does away with the silliness of an observer and “measurements”.
The other model is SQPR, which ignores gravity, but not matter abundance and the QM state (for example Quantum amplitudes) it is in…
***.
The SQPR Shift:
- If localization is independent of the background gravitational field g and depends instead on the density of surrounding matter fields (and the probability of guiding-wave truncation/shedding), then tilting the interferometer or placing it in a deep gravitational potential well will not alter the intrinsic collapse rate.
- An extended COW experiment conducted at sea level versus one conducted in microgravity (e.g., on the ISS) or on the Moon would yield the exact same decoherence rate in SQPR.
- Under Penrose, microgravity suppresses collapse; under SQPR, space microgravity leaves the collapse rate unchanged because matter-field interactions and guiding-wave limits remain invariant.
[Camping in Sierra Nevada; Post will be improved in future and computations made explicit…]
Patrice Ayme
#Consciousness #COWExperiment #Founndations #Interferometry #Localization #Neutrons #Penrrose #Philosophy #Physics #QuantumMechanics #Science #SQPR -
Theory Of Stellar Spectra by V.V. Sobolev
The only source of our information on stars is their radiation. From stellar spectra we judge the structure of stellar atmospheres, their chemical composition, and physical processes taking place there. Spectrograms are interpreted on the basis of the theory of stellar spectra, wherein lies its enormous value for astrophysics. Until recently astronomers could observe stellar radiation only in a very small range of frequencies making up the visible region of the spectrum. However, about 20 years ago radio astronomy came into being which permits investigating the radiation of celestial bodies in a completely different spectral region.
Quite recently, in connection with the launching of satellites and rockets, there arose the theoretical possibility of obtaining stellar spectra in any frequency range. So far, highly useful spectrograms of stars and the sun have been obtained in the so-called rocket ultraviolet. It is obvious that this broadening of observational data will even further increase the significance of the theory of stellar spectra. At the same time it is necessary to improve and extend this theory.
The surface layers of stars, out of which their spectra arise, represent
strongly ionized gases, i.e., plasma. Plasma studies are also being carried out in physics laboratories, having increased in intensity of late. Methods used by physicists in studying plasmas are in many respects similar to methods used by astrophysicists in studying stellar atmospheres. Therefore, the theory of stellar spectra is of interest not only to astrophysicists but also to physicists.An excellent example of the broad interest in the theory of stellar spectra is the summer seminary on problems of this theory, organized by the
Astronomical Council of the Academy of Sciences of the USSR and the Leningrad University and held in Leningrad in June 1964* About 150 young astrophysicists and physicists of the Soviet Union participated in the sessions. This book was written on the basis of the lectures given at that time.
The first part of the book examines atomic processes associated with the
formation of spectra, with special emphasis on calculation of the energy levels of the atom and the probability of transitions between these levels. The second part deals with the theory of radiation transfer, which forms an important aspect of the theory of stellar spectra. The next two parts discuss the most essential problems in the formation of spectra of different types of stars and nebulae. The last part, devoted to ultraviolet spectra of celestial bodies, mainly gives a review of observational data and their qualitative interpretation (since, as yet, no quantitative theory of these spectra has been established).
The diversity of the problems of the modern theory of stellar spectra makes it impossible to present them with sufficient completeness in a single monograph.
The authors of this book have endeavored to acquaint the reader with the most important of these problems.You can get the book here and here
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Preface …………………………………………… iii
PART I. PHYSICAL PROCESSES CONNECTED WITH THE FORMATION OF SPECTRA ………… 1
Plasma Spectroscopy (S.E. Frish) …………………….. 1
Calculations of Atomic Energy Levels (A.P. Yutsis and Ya.I. Vizbarayte) …………… 23
Theory of Atomic Transitions (G.F. Drukarev) ……….. 35PART II. THEORY OF RADIATIVE TRANSFER ……………………… 64
Certain Nonlinear Problems of the Theory of Radiative Transfer (V.A. Ambartsumyan) ……. 64
Radiative Diffusion in Gases (V.V. Sobolev) …………. 75
Determination of the Populations of Excited Levels in an Optically Thick Gas Layer (V.V. Ivanov) ……….. 92
Nonstationary Radiation Field (I.N. Minin) …………. 116
Randomized Problem of Diffuse Reflection (R.V. Ambartsumyan) ………… 135PART III. SPECTRA OF FIXED STARS ……………………….. 140
Models of Stellar Atmospheres (V.V. Sobolev) ………. 140
Continuous Spectra of Hot White Dwarfs (A.K. Kolesov) ……. 147
Model Atmospheres of Main-Sequence Stars of Class M (V.G. Buslavskiy) …….. 152
Determination of the Chemical Composition of Stellar Atmospheres (A.A. Boyarchuk) ……….. 160PART IV. SPECTRA OF NONSTATIONARY STARS AND INTERSTELLAR MATTER ………… 170
Spectra of Nonstationary (Variable) Stars (V.G. Gorbatskiy) ……….. 170
Analysis of the Emission Spectra of Nonstationary Stars (A.A. Boyarchuk) ………… 194
Spectra of Interstellar Matter (S.A. Kaplan) ………… 203
Radio Observations of Planetary Nebulae (Yu. N. Pariyskiy) ………. 216PART V. SPECTRA OF CELESTIAL BODIES IN THE FAR ULTRAVIOLET REGION ……….. 220
#astronomy #astrophysics #physics #quantumMechanics #radiativeTransfer #sovietLiterature #stellarSpectra #stellarStructure
Spectra of Celestial Bodies in the Far Ultraviolet Region (G.A. Gurzadyan) ………. 220 -
Releyendo "El orden del tiempo", de Carlo Rovelli
#quantumphysics #quantummechanics #thermodynamics -
[en] Moore’s Law? When #computer chips can't get smaller (can they?)
"... in the last 15 years, transistors have gotten close to the point where #quantum mechanics starts to interfere with their function: just a few dozen nanometers in size. They can’t get smaller."
"... approach familiar to urban planners: build up. On Thursday, #IBM announced it has created a #chip that uses this strategy. The new #architecture, known as a #nanostack, vertically stacks transistors in two layers on a #silicon chip."
https://www.technologyreview.com/2026/06/25/1139696/ibm-unveils-sub1nm-chip/
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Was #Feynman wrong about #QuantumMechanics? : Medium
What Will It Take to Get #AI Out of #Schools? : Misc
One #Vaccine may provide broad #Protection against many #Respiratory #Infections and #Allergens : Misc
Latest #KnowledgeLinks
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Master Index
A guided map across physics, biology, engineering, and AI—built around a simple idea
Persistence is not generated, but permitted.
Systems don’t fail because they “break.”
They fail because their boundaries were misclassified.
Core structure
state → constraint → resolution → persistenceFrom: - Titanic / Vasa / Challenger
– biological regulation
– AI hallucination & drift
– institutional collapseSame pattern
only admissible states persistThis is the interface.
Start anywhere. Follow the path that fits.#HybridMind42 #BoundaryDynamics #BoundaryArchitecture #BFPF #HQP
#Admissibility #ConstraintResolution #StateTransition #Persistence
#ComplexSystems #SystemsThinking #StructuralAnalysis #FailureAnalysis
#Physics #QuantumMechanics #Relativity #Lindblad #CPTP #Decoherence
#Biology #Physiology #Adaptation #Homeostasis
#ArtificialIntelligence #AI #LLM #AIAlignment #AIGovernance
#InstitutionalFailure #DecisionMaking
#Emergence #ScientificClarityhttps://substack.com/@hybridmind42/note/c-252017333?r=75c2ac
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Are the Mysteries of Quantum Mechanics Beginning to Dissolve?
#HackerNews #QuantumMechanics #Mysteries #ScienceNews #Physics #Research #QuantumTheory
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Why Even Physicists Still Don’t Understand Quantum Theory 100 Years On
Wiktor Mazin. Credit: Wiktor Mazin, Quantum Fractal Artist Everyone has their favourite example of a trick that reliably gets a certain job done, even if they don’t really understand why. Back in the day, it might have been slapping the top of your television set when the picture went fuzzy. Today, it might be turning your computer off and on again. Quantum mechanics the most successful and important theory in modern physics is like that. It works wonderfully, explaining things from lasers […]https://onlinemarketingscoops.com/2025/11/22/physicists-still-dont-understand-quantum-theory/
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Quantum Decoherence
#astrophysicist Matt O'Dowd: How Decoherence Splits the #Quantum #Multiverse. 15-min.🔗 https://www.youtube.com/watch?v=GlOwJWJWPUs 2020 Feb 24
🔗 https://Wikipedia.org/wiki/Quantum_decoherence … #Decoherence
🔗 https://Wikipedia.org/wiki/Coherence_(physics)#Quantum_coherence … #Coherence
🔗 https://Wikipedia.org/wiki/Quantum_mechanics … #QuantumMechanics
🔗 https://Wikipedia.org/wiki/Matt_O%27Dowd_(astrophysicist) … #MattODowd
🎓 h/t @carton383 -
New edition of this reference work by Franck Laloë, featuring the same fundamental and applied approach, along with 5 new additions. Essential for students and teachers of #quantumphysics.
More info: https://bit.ly/3XNes34
#EDPSciences
#QuantumPhysics
PhysicsEducation
#ScienceBooks
#QuantumMechanics
#PhysicsStudents
#STEMEducation
#AcademicBooks
@bookstodon
@[email protected]
@[email protected]
@science
@academia @academicchatter @academicsunite -
Exciting development in quantum mechanics. Potential for energy generation and new physics research. Curious to learn more about methods and limitations.
Via @QuantaMagazine, words by Charlie Wood (@charliewood).
#ScienceMastodon #Sciencedon #Science #PhysicsMastodon #Physicsdon #Physics #Quantum #QuantumMechanics #Energy #Research
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The remarkable origin and purpose of the shiny cobalt leaves on the Malaysian tropical plant #Begonia #pavonina
#Plants #Jungle #QuantumMechanics #Photosynthesis #SlowLight
https://www.popularmechanics.com/science/energy/a23514/quantum-mechanics-turns-leaves-blue/
