Category Archives: Quantum

Dream a Little Dream: Quantum Computer Poetry for the Skeptics (Part I, mainly 2019)

Stars shining bright above you, Night breezes seem to whisper “I love you” Birds singing in the sycamore tree. Dream a little dream. (YouTube) Greetings from NYC everybody! Peter Shor pioneered (Nov 26, 2019) quantum poetry for the skeptics over … Continue reading

Posted in Art, Music, Poetry, Quantum | Tagged | 1 Comment

To cheer you up in difficult times 29: Free will, predictability and quantum computers

I wrote a paper, in Hebrew, entitled “Free will, predictability and quantum computers.” Click for the pdf file (Version of Aug. 24, 2021; orig. version). As you probably know, the free will problem is the apparent contradiction between the fact … Continue reading

Posted in Philosophy, Quantum | Tagged , | 5 Comments

Let me tell you about three of my recent papers

  Let me tell you briefly about three of my papers that were recently accepted for publication. Relative Leray numbers via spectral sequences with Roy Meshulam, Helly-type problems with Imre Bárány, and Statistical aspects of quantum supremacy experiments with Yosi … Continue reading

Posted in Combinatorics, Convexity, Geometry, Quantum, Statistics | Tagged , , , , | Leave a comment

Amazing: Feng Pan and Pan Zhang Announced a Way to “Spoof” (Classically Simulate) the Google’s Quantum Supremacy Circuit!

Feng Pan and Pan Zhang uploaded a new paper on the arXive  “Simulating the Sycamore supremacy circuits.” with an amazing announcement. Abstract: We propose a general tensor network method for simulating quantum circuits. The method is massively more efficient in … Continue reading

Posted in Computer Science and Optimization, Physics, Quantum | Tagged , , | 1 Comment

The Argument Against Quantum Computers – A Very Short Introduction

Left: Gowers’s book Mathematics a very short introduction. Right C. elegans; Boson Sampling can be seen as the C. elegans of quantum computing. (See, this paper.) Update (January 6, 2021): Tomorrow January, 7, 8:30 AM Israel time, I give a … Continue reading

Posted in Combinatorics, Computer Science and Optimization, Physics, Probability, Quantum | Tagged , | 7 Comments

Photonic Huge Quantum Advantage ???

This is a quick and preliminary post about a very recent announcement in a Science Magazine paper: Quantum computational advantage using photons by a group of researchers leaded by Jianwei Pan and Chao-Yang Lu. (Most of the researchers are from … Continue reading

Posted in Combinatorics, Physics, Probability, Quantum | Tagged , | 12 Comments

Quantum Matters

A comparison between the Google estimator U for the fidelity and two improved estimators that we studied  MLE (maximum likelihood estimator) and V (a variant of U). (More figures at the end of the post.) Here are some links on … Continue reading

Posted in Quantum, Statistics | Tagged , | 6 Comments

Trees not Cubes! Memories of Boris Tsirelson

This post is devoted to a few memories of Boris Tsirelson who passed away at the end of January. I would like to mention that a few days ago graph theorist Robin Thomas passed away after long battle with ALS. … Continue reading

Posted in Combinatorics, Obituary, Probability, Quantum | Tagged | 3 Comments

Amazing: Zhengfeng Ji, Anand Natarajan, Thomas Vidick, John Wright, and Henry Yuen proved that MIP* = RE and thus disproved Connes 1976 Embedding Conjecture, and provided a negative answer to Tsirelson’s problem.

A few days ago an historic 160-page paper with a very short title MIP*=RE was uploaded to the arXive by Zhengfeng Ji, Anand Natarajan, Thomas Vidick, John Wright, and Henry Yuen.  I am thankful to Dorit Aharonov and Alon Rosen … Continue reading

Posted in Algebra, Analysis, Combinatorics, Computer Science and Optimization, Physics, Quantum | Tagged , , , , | 13 Comments

The Google Quantum Supremacy Demo and the Jerusalem HQCA debate.

Below are 10 annotated slides from a spontaneous informal talk that I gave at the school on mathematics of quantum computing a weak ago. (Power point presentation.) Later in the afternoon we had  a panel/debate on quantum supremacy (click for … Continue reading

Posted in Controversies and debates, Quantum | Tagged , , , , , , , , , , | 4 Comments