physics

Harald Pfeiffer

Harald Pfeiffer is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Harald Pfeiffer rather than just read about it. In short: Harald Pfeiffer (born 1974) is a German astrophysicist at the University of Potsdam. Education and career Pfeiffer attended the Steigerwald-Landschulheim-Weisentheid, graduating in 1993.

Key takeaways

Harald Pfeiffer belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Harald Pfeiffer to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Harald Pfeiffer from memory before moving on to harder problems.

Reference excerpt

Harald Pfeiffer (born 1974) is a German astrophysicist at the University of Potsdam.

Education and career Pfeiffer attended the Steigerwald-Landschulheim-Weisentheid, graduating in 1993. In 1993, he participated in the International Physics Olympiad, winning a gold medal. He studied physics at the University of Bayreuth from 1994 to 1997, before continuing to the University of Cambridge from 1997 to 1998. Following this, he attended Cornell University, completing his PhD in 2003. Between 2003 and 2009, he was employed at California Institute of Technology, first as a Sherman Fairchild Postdoctoral Scholar, and then as a Senior Postdoctoral Scholar. He then took up a position as associate, and then assistant, professor at the Canadian Institute for Theoretical Astrophysics, University of Toronto. Since 2017, Pfeiffer has been a group leader in the Astrophysical and Cosmological Relativity department at the Max Planck Institute for Gravitational Physics in Potsdam, and a professor at the university of Potsdam.

Research interests Pfeiffer's work focuses on the applications of numerical relativity to gravitational wave astronomy. He develops methods to solve problems from gravitational physics using supercomputers. In particular, he uses simulations to answer questions about the emission of gravitational radiation from binary systems of black holes or neutron stars. He is involved in the analysis of detector data from LIGO, Virgo, and KAGRA, and also works on the development of new experiments such as LISA. Together with Lawrence Kidder and Mark School, he is a lead developer of the Spectral Einstein Code (SpEC), which solves numerically the partial differential equations describing compact binary coalescences. Using this code, they are able to predict the gravitational waveforms produced by such systems, which can then be searched for in detector data. Pfeiffer is also interested in improving the theoretical understanding of the properties of the Einstein Field Equations, and exploring possible alternative theories of gravity.

Awards 2015: Friedrich Wilhelm Bessel Research Award 2016: Special Breakthrough Prize in Fundamental Physics 2016: Gruber Cosmology Prize 2023: Fellow of the American Physical Society, for his leadership and numerous high-impact research contributions to the field of numerical relativity, which have greatly helped to interpret gravitational-wave observations of binary black holes.

References

Worked examples

Example 1 — a first encounter with Harald Pfeiffer

Start with the simplest possible case. Write down what Harald Pfeiffer claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Harald Pfeiffer before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Harald Pfeiffer ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Harald Pfeiffer

In research: Harald Pfeiffer appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Harald Pfeiffer in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Harald Pfeiffer is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1974 births, Cornell University alumni, Fellows of the American Physical Society, so understanding it makes those chapters shorter.
In everyday life: Look for Harald Pfeiffer outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Harald Pfeiffer in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Harald Pfeiffer means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Harald Pfeiffer out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Harald Pfeiffer in simple terms?

Harald Pfeiffer (born 1974) is a German astrophysicist at the University of Potsdam. Education and career Pfeiffer attended the Steigerwald-Landschulheim-Weisentheid, graduating in 1993.

Why does Harald Pfeiffer matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Harald Pfeiffer?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Harald Pfeiffer.