## PHYSICS 14N: Quantum Information: Visions and Emerging Technologies

What sets quantum information apart from its classical counterpart is that it can be encoded non-locally, woven into correlations among multiple qubits in a phenomenon known as entanglement. We will discuss paradigms for harnessing entanglement to solve hitherto intractable computational problems or to push the precision of sensors to their fundamental quantum mechanical limits. We will also examine challenges that physicists and engineers are tackling in the laboratory today to enable the quantum technologies of the future.

Terms: Aut, Spr
| Units: 3
| UG Reqs: WAY-FR, WAY-SMA

Instructors:
Schleier-Smith, M. (PI)
;
Cook, C. (TA)

## PHYSICS 15: Stars and Planets in a Habitable Universe

Is the Earth unique in our galaxy? Students learn how stars and our galaxy have evolved and how this produces planets and the conditions suitable for life. Discussion of the motion of the night sky and how telescopes collect and analyze light. The life-cycle of stars from birth to death, and the end products of that life cycle -- from dense stellar corpses to supernova explosions. Course covers recent discoveries of extrasolar planets -- those orbiting stars beyond our sun -- and the ultimate quest for other Earths. Intended to be accessible to non-science majors, material is explored quantitatively with problem sets using basic algebra and numerical estimates. Sky observing exercise and observatory field trips supplement the classroom work.

Terms: Aut, Sum
| Units: 3
| UG Reqs: GER: DB-NatSci, WAY-SMA

Instructors:
Hirsch, L. (PI)
;
Macintosh, B. (PI)
;
Hernandez, A. (TA)
...
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Instructors:
Hirsch, L. (PI)
;
Macintosh, B. (PI)
;
Hernandez, A. (TA)
;
Hulcher, Z. (TA)
;
Kokron, N. (TA)
;
Mathis, D. (TA)

## PHYSICS 21: Mechanics, Fluids, and Heat

How are the motions of objects and the behavior of fluids and gases determined by the laws of physics? Students learn to describe the motion of objects (kinematics) and understand why objects move as they do (dynamics). Emphasis on how Newton's three laws of motion are applied to solids, liquids, and gases to describe phenomena as diverse as spinning gymnasts, blood flow, and sound waves. Understanding many-particle systems requires connecting macroscopic properties (e.g., temperature and pressure) to microscopic dynamics (collisions of particles). Laws of thermodynamics provide understanding of real-world phenomena such as energy conversion and performance limits of heat engines. Everyday examples are analyzed using tools of algebra and trigonometry. Problem-solving skills are developed, including verifying that derived results satisfy criteria for correctness, such as dimensional consistency and expected behavior in limiting cases. Physical understanding fostered by peer interaction and demonstrations in lecture, and interactive group problem solving in discussion sections. Prerequisite: high school algebra and trigonometry; calculus not required.

Terms: Aut, Sum
| Units: 4
| UG Reqs: GER: DB-NatSci, WAY-SMA

Instructors:
MacPherson, Q. (PI)
;
Nanavati, C. (PI)
;
Gaspert, A. (TA)
...
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Instructors:
MacPherson, Q. (PI)
;
Nanavati, C. (PI)
;
Gaspert, A. (TA)
;
Gruenke, R. (TA)
;
Multani, K. (TA)
;
Smith, R. (TA)
;
Timcheck, J. (TA)
;
Zawada, A. (TA)

## PHYSICS 22: Mechanics, Fluids, and Heat Laboratory

Guided hands-on exploration of concepts in classical mechanics, fluids, and thermodynamics with an emphasis on student predictions, observations and explanations. Pre- or corequisite:
PHYSICS 21.

Terms: Aut
| Units: 1

## PHYSICS 45: Light and Heat

What is temperature? How do the elementary processes of mechanics, which are intrinsically reversible, result in phenomena that are clearly irreversible when applied to a very large number of particles, the ultimate example being life? In thermodynamics, students discover that the approach of classical mechanics is not sufficient to deal with the extremely large number of particles present in a macroscopic amount of gas. The paradigm of thermodynamics leads to a deeper understanding of real-world phenomena such as energy conversion and the performance limits of thermal engines. In optics, students see how a geometrical approach allows the design of optical systems based on reflection and refraction, while the wave nature of light leads to interference phenomena. The two approaches come together in understanding the diffraction limit of microscopes and telescopes. Discussions based on the language of mathematics, particularly calculus. Physical understanding fostered by peer interaction
more »

What is temperature? How do the elementary processes of mechanics, which are intrinsically reversible, result in phenomena that are clearly irreversible when applied to a very large number of particles, the ultimate example being life? In thermodynamics, students discover that the approach of classical mechanics is not sufficient to deal with the extremely large number of particles present in a macroscopic amount of gas. The paradigm of thermodynamics leads to a deeper understanding of real-world phenomena such as energy conversion and the performance limits of thermal engines. In optics, students see how a geometrical approach allows the design of optical systems based on reflection and refraction, while the wave nature of light leads to interference phenomena. The two approaches come together in understanding the diffraction limit of microscopes and telescopes. Discussions based on the language of mathematics, particularly calculus. Physical understanding fostered by peer interaction and demonstrations in lecture, and discussion sections based on interactive group problem solving. In order to register for this class students must EITHER have already taken an introductory Physics class (20, 40, or 60 sequence) or have taken the Physics Placement Diagnostic at
https://physics.stanford.edu/academics/undergraduate-students/placement-diagnostic. Prerequisite:
PHYSICS 41 or equivalent.
MATH 21 or
MATH 51 or
CME 100 or equivalent.

Terms: Aut
| Units: 4
| UG Reqs: GER: DB-NatSci, WAY-SMA

Instructors:
Hartnoll, S. (PI)
;
Cook, C. (TA)
;
Jonay, C. (TA)
...
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Instructors:
Hartnoll, S. (PI)
;
Cook, C. (TA)
;
Jonay, C. (TA)
;
Mukhopadhyay, P. (TA)
;
O'Beirne, A. (TA)
;
Pistunova, K. (TA)
;
Prabhu, A. (TA)
;
Yuan, A. (TA)
;
Zamora, A. (TA)

## PHYSICS 46: Light and Heat Laboratory

Hands-on exploration of concepts in geometrical optics, wave optics and thermodynamics. Pre- or corequisite:
PHYSICS 45.

Terms: Aut
| Units: 1

## PHYSICS 59: Frontiers of Physics Research

Recommended for prospective Physics or Engineering Physics majors or anyone with an interest in learning about the big questions and unknowns that physicists tackle in their research at Stanford. Weekly faculty presentations, in some cases followed by tours of experimental laboratories where the research is conducted.

Terms: Aut
| Units: 1

Instructors:
Anderson, L. (PI)

## PHYSICS 61: Mechanics and Special Relativity

(First in a three-part advanced freshman physics series:
PHYSICS 61,
PHYSICS 63,
PHYSICS 65.) This course covers Einstein's special theory of relativity and Newtonian mechanics at a level appropriate for students with a strong high school mathematics and physics background, who are contemplating a major in Physics or Engineering Physics, or are interested in a rigorous treatment of physics. Postulates of special relativity, simultaneity, time dilation, length contraction, the Lorentz transformation, causality, and relativistic mechanics. Central forces, contact forces, linear restoring forces. Momentum transport, work, energy, collisions. Angular momentum, torque, moment of inertia in three dimensions. Damped and forced harmonic oscillators. Uses the language of vectors and multivariable calculus. In order to register for this class students must EITHER have already taken an introductory Physics class (20, 40, or 60 sequence) or have taken the Physics Placement Diagnostic at
https://physics.stanford.edu/academics/undergraduate-students/placement-diagnostic. Recommended prerequisites: Mastery of mechanics at the level of AP Physics C and AP Calculus BC or equivalent. Corequisite:
MATH 51 or
MATH 61CM or
MATH 61DM.

Terms: Aut
| Units: 4
| UG Reqs: GER: DB-NatSci, WAY-FR, WAY-SMA

Instructors:
Burchat, P. (PI)
;
Coppess, K. (TA)
;
Giurgica-Tiron, T. (TA)
...
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Instructors:
Burchat, P. (PI)
;
Coppess, K. (TA)
;
Giurgica-Tiron, T. (TA)
;
Kang, M. (TA)
;
Park, J. (TA)

## PHYSICS 62: Mechanics Laboratory

Introduction to laboratory techniques, experiment design, data collection and analysis simulations, and correlating observations with theory. Labs emphasize discovery with open-ended questions and hands-on exploration of concepts developed in
PHYSICS 61 including Newton's laws, conservation laws, rotational motion. Pre-or corequisite
PHYSICS 61

Terms: Aut
| Units: 1

## PHYSICS 70: Foundations of Modern Physics

Required for Physics or Engineering Physics majors who completed the PHYSICS 40 series. Introduction to special relativity: reference frames, Michelson-Morley experiment. Postulates of relativity, simultaneity, time dilation. Length contraction, the Lorentz transformation, causality. Doppler effect. Relativistic mechanics and mass, energy, momentum relations. Introduction to quantum physics: atoms, electrons, nuclei. Quantization of light, Planck constant. Photoelectric effect, Compton and Bragg scattering. Bohr model, atomic spectra. Matter waves, wave packets, interference. Fourier analysis and transforms, Heisenberg uncertainty relationships. Schrödinger equation, eigenfunctions and eigenvalues. Particle-in-a-box, simple harmonic oscillator, barrier penetration, tunneling, WKB and approximate solutions. Time-dependent and multi-dimensional solution concepts. Coulomb potential and hydrogen atom structure. Prerequisites:
PHYSICS 41,
PHYSICS 43. Pre or corequisite:
PHYSICS 45. Recommended: prior or concurrent registration in
MATH 53.

Terms: Aut
| Units: 4
| UG Reqs: GER: DB-NatSci, WAY-SMA

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