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The latest version of the book is B2.0, released 11 days ago. If you've bought a PDF of the book and would like to update it to this version (for free), visit your home page.

By default this page displays the errata for the latest version of the book. If you have a previous version, select it here:

If you've found a new error, please submit it.

  • Typo
  • Tech. error
  • Suggestion
  • Maybe next edition
  • Not a problem
  • Reported in: B1.0 (27-Oct-19)
#85934
Paper page: 67
Is it worth discussing unpredictability of some IBM machines compared to others, perhaps due to overheating? Running identical circuits, I've noticed...more...
  • Reported in: B1.0 (28-Oct-19)
#85937
PDF page: 69
When looking at the "epub" version of the book on the Apple "books" app, the sub-numbering of the problem sets doesn't go like 1->a->i. Instead it's j...more...
  • Reported in: B2.0 (16-Nov-19)
  • Fixed: 16-Nov-19, awaiting book release
#86012
Paper page: 172

The "vertical bar" at the start of the definition below "Substituting for..." is not required.--Kaoru Hosokawa

  • Reported in: B2.0 (08-Nov-19)
  • Fixed: 09-Nov-19, awaiting book release
#85984
PDF page: 175
Paper page: 162
Try your Hand: 2. Draw the qubit represented by the following quantum state: −0.35 |0⟩ + 0.28 |1⟩ Is that a valid Quantum state? Squaring the gi...more...
  • Reported in: B2.0 (12-Nov-19)
  • Fixed: 13-Nov-19, awaiting book release
#86002
PDF page: 179
Paper page: 193
The Errata I reported on this is wrong, the second H Gate is correct, but the first is backwards. Then the following U gate is backwards, and so i...more...
  • Reported in: B2.0 (14-Nov-19)
  • Fixed: 15-Nov-19, awaiting book release
#86009
PDF page: 185
Paper page: 171
In "From 2D to 3D Qubelets Try Your Hand" section, "4. Consider a qubit with the 2 pentagon..." should be "4. Consider a qubit with the single pentago...more...
  • Reported in: B2.0 (12-Nov-19)
  • Fixed: 13-Nov-19, awaiting book release
#86001
PDF page: 193
Paper page: 179
In describing using the U3 Gate to replicate the H Gate, it's printed twice, the second time wrong: H Gate: = U3 (π/2,π, 0) H Gate: = U3 (π/2,0, π) ...more...
  • Reported in: B2.0 (16-Nov-19)
  • Fixed: 16-Nov-19, awaiting book release
#86013
Paper page: 267

The equation below "..., the angle (phi) is:" should be "(phi) = - pi/r radians".--Kaoru Hosokawa

  • Reported in: B2.0 (16-Nov-19)
  • Fixed: 16-Nov-19, awaiting book release
#86014
Paper page: 267
Since the angle (phi) = - pi/6 radians, shouldn't we calculate e to the power of i (-pi/6) instead of i (pi/6) in the equation following "Thus, 30 deg...more...
  • Reported in: B2.0 (14-Nov-19)
  • Fixed: 15-Nov-19, awaiting book release
#86008
PDF page: 275
Paper page: 267
The equation here uses across to get an angle from amplitude, I don't thin it's mentioned anywhere else. ... maybe explain this operation before ...more...