Lectures for the first term of a course on quantum computation taught at Caltech in Fall 2020. Slides for all the lectures are available at http://theory.cal...

Forty years ago, Richard Feynman proposed harnessing quantum physics to build a more powerful kind of computer. Realizing Feynman's vision is one of the grand challenges facing 21st century...

Renormalization has become perhaps the single most important advance in theoretical physics in 50 years.

Rapid ongoing progress in quantum information science makes this an apt time for a Solvay Conference focused on The Physics of Quantum Information. Here I review four intertwined themes...

This year’s Breakthrough Prize in Fundamental Physics honors some of the pioneers of quantum information science

A scion of a renowned family of physicists, he helped set the stage for what has been called the golden age of black hole astrophysics.

Yale President Peter Salovey announced on Feb. 11 that the university would rename Calhoun College in honor of Grace Murray Hopper ’30 M.A., ’34 Ph.D.

Worse, they don’t seem to want to understand it.

The solutions to Einstein’s equations that describe a spinning black hole won’t blow up, even when poked or prodded.

Editor’s Note: This post was co-authored by Hsin-Yuan Huang (Robert) and Richard Kueng. John Preskill, Richard P. Feynman Professor of Theoretical Physics at Caltech, has been named the 2024 …

Quantum bits are fussy and fragile. Useful quantum computers will need to use an error-correction technique like the one that was recently demonstrated on a real machine.

Researchers finally seem to have a quantum computer that can outperform a classical computer. But what does that really mean?

This paper presents a comprehensive review of both the theory and experimental successes of Quantum Chromodynamics, starting with its emergence as a well defined theory in 1972-73 and following...

The unprecedented experiment explores the possibility that space-time somehow emerges from quantum information, even as the work’s interpretation remains disputed.

After an early breakthrough on light and matter, he became a writer who challenged climate science and pondered space exploration and nuclear warfare.

Terry Rudolph, PsiQuantum & Imperial College London During a recent visit to the wild western town of Pasadena I got into a shootout at high-noon trying to explain the nuances of this question …

Sir Roger Penrose was at school when he realised that his mind worked in an unusual way. ‘I thought, maybe when I go to university, I’ll find people who think like me,’ he tells me, at the beginning...

Nature Reviews Physics - Theoretical high-energy and condensed-matter physics share various ideas and tools. New connections between the two have been established through quantum information,...

Quantum computers developed to date have been one-of-a-kind devices that fill entire laboratories. Now, physicists at the University of Innsbruck have built a prototype of an ion trap quantum...

IQIM Seminar by John Martinis (Research Scientist and Professor of Physics Google and University of California, Santa Barbara), "Quantum supremacy using a p...

The president referenced infrastructure, immigration, quantum computing and much more in his first formal press conference.

You’ve seen the stories—in the Financial Times, Technology Review, CNET, Facebook, Reddit, Twitter, or elsewhere—saying that a group at Google has now achieved quantum computation…

Steven Weinberg was, perhaps, the last truly towering figure of 20th-century physics. In 1967, he wrote a 3-page paper saying in effect that as far as he could see, two of the four fundamental forc…

In three towering papers, a team of mathematicians has worked out the details of Liouville quantum field theory, a two-dimensional model of quantum gravity.

The order will affect technology firms, forestry companies and others who fill some jobs with temporary workers. The White House says the measures are necessary to protect U.S. workers amid job...

Noisy Intermediate-Scale Quantum (NISQ) technology will be available in the near future. Quantum computers with 50-100 qubits may be able to perform tasks which surpass the capabilities of today's...

For years, I’d sometimes hear discussions about the ethics of quantum computing research. Quantum ethics! When the debates weren’t purely semantic, over the propriety of terms like R…

On May 11 & 12, 2018, Caltech and PMA presented Feynman 100, a celebration of Richard Feynman’s life & legacy on the occasion of his 100th birthday.The May 1...

Although measuring the deterministic waveform of a weak classical force is a well-studied problem, estimating a random waveform, such as the spectral density of a stochastic signal field, is much...

Today we're introducing Quantum algorithms: A survey of applications and end-to-end complexities. This is a comprehensive resource, designed for quantum computing researchers and customers who are...

There are hints of a novel object ("Planet 9") with a mass $5-10$ $M_\oplus$ in the outer Solar System, at a distance of order 500 AU. If it is a relatively conventional planet, it can be found in...

Last week I got an email from Dina Katabi, my former MIT colleague, asking me to call her urgently. Am I in trouble? For what, though?? I haven’t even worked at MIT for five years! Luckily, D…

I survey, for a general scientific audience, three decades of research into which sorts of problems admit exponential speedups via quantum computers -- from the classics (like the algorithms of...

Quantum computing is still really, really hard. But the rise of a powerful class of error-correcting codes suggests that the task might be slightly more feasible than many feared.

Researchers at Yale have extended the lifetime of a qubit by 2.3 times, a major step in improving and proving the viability of quantum computers.