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Corrections to Second Edition, 4th revision (Sept 2022) of Student Friendly Quantum Field Theory
Note: 1st edition and 2nd edition (prior versions) users also need to check this 2nd edition, 4th revision corrections page for additional corrections.
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Sorted by Page Number: This Page |
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Sorted by Date Posted: Click Here |
Significant Corrections (may impact learning process)
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Pg |
Chap |
Date Posted |
Significant Correction |
Reported by (blank = the author) |
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54 |
3 |
Dec 29, 2024 |
Pedagogic aid Sect. 3.4.2: Note that the number operator obviously commutes with the Hamiltonian, so eigenstates of the Hamiltonian are also eigenstates of the number operator. Further, the number operator is dimensionless due to the form of the Hamiltonian and has real eigenvalues because it is a Hermitian operator.+ |
Mikhail Denisov |
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115 |
4 |
Aug 30, 2024 |
Pedagogic aid: At the end of Sect. 4.10, it can help to look at Summary of operators, fields, and states in different QFT vector spaces |
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129&130 |
4 |
Sept 3, 2025
Dec 29, 2024 |
(4-187), 2nd term after equal sign: Change “B1” to “B2”
(4-188), 1st line, 2nd term after equal sign: Change “B1” to “B2” |
Albert Clements Mikhail Denisov |
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157 |
5 |
Sept 21, 2024 |
H0 row, last column. Change 1/2 to zeta_r (as in (5-57) pg 149. |
Albert Clements |
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171 |
6 |
Sept 19, 2022 |
(6-22): Insert a minus sign after “Mk =” and note that the last relation for Qk is valid for v << 1. For v a significant fraction of the speed of light 1, and for more insight on (6-22), see www.quantumfieldtheory.info/Spinor_Lorentz_transf.pdf and the references in the footnote on this page 171. |
Anthony Soong |
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247 |
8 |
Nov 27, 2023 |
Fig. 8-13: The left diagram should have the direction of the top arrow reversed, so it is an incoming positron, not an electron. |
Glenn Rowe |
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247 |
8 |
April 17, 2024 |
Appendix: See Correction for Chap 8 Appendix. |
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337b |
13 |
July 2, 2024 |
Prob. 2, 1st line: After “three” insert |
Alexis Hardin |
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343 |
14 |
Nov 11, 2024 |
First line after (14-4), after “m0”, insert “+iε”. Change “i” after the second equal sign to a minus sign. At the end of the paragraph, insert “See (13-54), pg. 333.” |
Albert Clements |
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352 |
14 |
Nov 11, 2024 |
Fig. 14-1, first row of diagrams: The last diagram should have a loop in the bottom wavy line. |
Albert Clements |
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359 |
14 |
Nov 11, 2024 |
The two lines above (14-66),
change 1/A to i/A. Change “B=i” to “B = ̵̶̶ |
Albert Clements |
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362 |
14 |
Nov 11, 2024 |
First line of “Bottom line” paragraph: Change “second” to “nth”. |
Albert Clements |
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362 |
14 |
Nov 11, 2024 |
(14-84), 2nd line: The superscript “e0 nth 2nd” should be “e0 mod nth”. |
Albert Clements |
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376 |
15 |
Nov 11, 2024 |
(15-13): after second equal sign from the right, insert minus sign. |
Albert Clements |
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384 |
15 |
July 2, 2024 |
Last two lines on page: Change “bottom row” to |
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407 |
16 |
July 2, 2024 |
4th and 5th lines below
(16-18): change “exchange velocities (directions)” to |
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415-416 |
16 |
Nov 15, 2022 |
Pedagogic aid |
Jack Freinhar |
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447 |
17 |
Dec 30, 2024 |
(17-29): Change p’^0 on LHS to E’ = cp’^0 |
Albert Clements |
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450 |
17 |
July 2, 2024 |
Wholeness Chart 17-3, 3rd row up from
bottom, NR Classical column: after “via”, insert |
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475 |
17 |
Jan 20, 2023 |
Pedagogic aid Line above (17-154): After “and”, add “the trace of the identity matrix in spinor space is 4, so we get” |
Jack Freinhar |
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521 |
Index |
Oct 5, 2023 |
After “contraction, as propagator, equal times contraction, 203, 208” add “, 247”. |
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523 |
Index |
May 1, 2025 |
After “gauge theory, 136,” insert “177” |
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526 |
Index |
Oct 5, 2023 |
Just above “target stationary system”, insert “tadpole diagram, 247” |
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Minor Corrections (should not impact learning process)
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Pg |
Chap |
Date Posted |
Minor Correction |
Reported by |
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2 |
1 |
Aug 12, 2023 |
9th line: change “an muon” to - a muon - |
David Lear |
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7 |
1 |
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7th line down on page: after “solutions”, insert “(for free fields)” |
Michael Koren |
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9 |
1 |
Dec 29, 2024 |
Sect. 1.10, 5th line: Change “though” to “through” |
Mikhail Denisov |
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51 |
3 |
Dec 29, 2024 |
1st line after title “Third Way to …”: Move period after “2” to after “Chap”. |
Mikhail Denisov |
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63 |
3 |
Dec 29, 2024 |
1st margin note: Change “alpha” to “is”. |
Mikhail Denisov |
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70 |
3 |
Dec 29, 2024 |
1st line after (3-115): Change “highest” to “(higher)” |
Mikhail Denisov |
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71 |
3 |
Sept 26, 2022 |
3rd paragraph, 3rd line: after “field”, insert “operator” |
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130 |
4 |
Dec 29, 2024 |
(4-188), 1st line, 2nd term after equal sign: Change “B1” to “B2” |
Mikhail Denisov |
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138 |
5 |
Dec 29, 2024 |
1st line: Add an “s” to “Equation” |
Mikhail Denisov |
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139 |
5 |
Dec 29, 2024 |
Last line: Add an “s” to “equation” |
Mikhail Denisov |
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140 |
5 |
Oct 5, 2023 |
3 lines above (5-31), delete comma after “Knowing that,” |
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156 |
5 |
Dec 29, 2024 |
Last row: Change “dk” to “d3k”, 3 places |
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176 |
6 |
Sept 21, 2024 |
Last line (6-41): sum in second part of the commutator should have primes on k to distinguish it from first part of commutator. |
Albert Clements |
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177 |
6 |
Sept 21, 2024 |
First line: Either change q to Q, or delete q. The total charge Q is conserved. |
Albert Clements |
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195 |
7 |
Oct 5, 2023 |
Page number on upper right is partially blanked out. |
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216 |
6 |
Sept 21, 2024 |
Fifth line up from bottom: delete “state”. |
Albert Clements |
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218 |
6 |
Sept 21, 2024 |
First line after (8-16): make “1” inside ket (2 places) subscripts. |
Albert Clements |
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224 |
8 |
Sept 21, 2024 |
(8-47): Add a subscript F to D. |
Albert Clements |
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227 |
8 |
Sept 21, 2024 |
(8-54), 2nd and 4th lines: After a and a dagger, insert (k”) |
Albert Clements |
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227 |
8 |
Sept 21, 2024 |
(8-55), 1st line: Change subscript on c dagger from r” to s”. |
Albert Clements |
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260 |
9 |
July 2, 2024 |
5th
line above Sect. 9.1.4: after “integral”, insert |
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272 |
10 |
Sept 26, 2022 |
3rd paragraph, 1st line: remove underlining on “Fuller-Davies-Unruh effect”. |
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275 |
10 |
Sept 21, 2024 |
Line above (10-13): Correct as is, but probably better to say (10-9) instead of (10-11). |
Albert Clements |
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285b to 285c |
10 |
Oct 5, 2023 |
On the upper right corner of pg 285a, remove “285b”. On the next page, at the top, remove “285c” and “287”. On that page, on the upper right corner, insert “285b”. On the page after that, in the upper left corner, change “288” to “285c”. |
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290 |
11 |
July 2, 2024 |
Line after (11-18): eliminate indent on line. |
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297 |
11 |
July 2, 2024 |
Footnote: Delete the 2nd sentence. At the end, add the following paragraph. “In a more general mathematical sense, the gauge covariant derivative of QFT and the covariant derivative of GR, are birds of a feather. Each entails a local variation in the four-derivative, due to a field - the gauge field for QFT and the spacetime metric field for GR.” |
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308 |
12 |
Sept 26, 2022 |
2nd line up from bottom: underline “bn is a “constant” |
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322 |
13 |
Dec 22, 2023 |
The quote below the chapter title is now thought by most scholars to have been written, not by Edward Dyer, but by Edward de Vere, Earl of Oxford, whom I personally have come to believe is also the actual author of the works attributed to William Shakespeare. |
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329 |
13 |
July 2, 2024 |
4th
line down on page: after “two” insert |
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332 |
13 |
Sept 21, 2024 |
(13-49), last line, 2nd
from last factor: Change (p-slash) to (p-slash |
Albert Clements |
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345-9 |
14 |
Nov 11, 2024 |
Summation signs have “i” below and “i=7” above. Should be “i=1” below and “7” above. |
Albert Clements |
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354 |
14 |
Nov 11, 2024 |
Second margin note on page: Change ‘’14-4’’ to ‘’14-5’’. |
Albert Clements |
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359 |
14 |
Nov 11, 2024 |
Paragraph above (14-65) and second margin note on page: A(0) should be Anth(0). 3 places. |
Albert Clements |
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362 |
14 |
Nov 11, 2024 |
(14-82): Change superscript “mod” to “Mod”. |
Albert Clements |
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363 |
14 |
Nov 11, 2024 |
(14-85), 2nd row: Change subscript f to gamma. |
Albert Clements |
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376 |
15 |
Nov 11, 2024 |
(14-87) to (14-90): Scripts “mod” should all be “Mod”. |
Albert Clements |
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377 |
15 |
Nov 11, 2024 |
Margin note: Change positions of “Euclidean space” and “spacetime”. |
Albert Clements |
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383 |
15 |
Nov 11, 2024 |
Title “Issues with (15-52)”: “52” should be “53”. |
Albert Clements |
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392 |
15 |
July 2, 2024 |
This may be a pedagogic help, but it is minor so included here. Line after (15-103): Move the phrase “where .. line” to the line just above (15.103). |
Alexis Hardin |
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395 |
15 |
Nov 11, 2024 |
Last margin note: Subscript “i” should be “1”. |
Albert Clements |
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415 |
16 |
Nov 11, 2024 |
Sub-sect. “How We’ll Go About It”, next to last paragraph, next to last line: Change “16.2.4” to “16.2.3”. |
Albert Clements |
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416 |
16 |
Nov 11, 2024 |
4th line below (16-52): insert a minus sign after each equal sign. |
Albert Clements |
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417 |
16 |
Nov 7, 2022 |
Delete first sentence after (16-54). |
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421 |
16 |
Nov 11, 2024 |
Line below (16-76): Put nu subscripts on p and p’. |
Albert Clements |
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453 |
17 |
Dec 30, 2024 |
Line above (17-40): Change 0) to 0. |
Albert Clements |
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455 |
17 |
Dec 30, 2024 |
(17-50) to (17-52): Add a prime to p in d^3 p_f’. 3 places |
Albert Clements |
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455 |
17 |
July 2, 2024 |
4th
line above (17-52): after “numerator”, insert |
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457 |
17 |
July 2, 2024 |
(17-62):
after the last parentheses, as a subscript, insert E’2 + E’1 ̶ |
Alexis Hardin |
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461 |
17 |
Dec 30, 2024 |
(17-83), first under bracket: add an s to gamma. |
Albert Clements |
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480 |
17 |
Dec 30, 2024 |
(17-174): put a prime on the second omega |
Albert Clements |
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480 |
17 |
July 2, 2024 |
3rd line below (17-176): move “)” to end of line above |
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485 |
17 |
Aug 12, 2023 |
4th row in chart, step 11a, 2nd column: “M|2” should be - |M|2.- |
David Lear |
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495 |
18 |
Nov 11, 2024 |
Fig. 18-3, middle part: The location of the H point should be a tad lower, so it looks lower than the G and I points. |
Park Hensley |
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507 |
18 |
Nov 11, 2024 |
Operator row of the chart, 2nd column: before the “t”, insert “(and rarely)”. |
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517 |
19 |
Nov 11, 2024 |
2nd line after (19-7): After the differential cross section, insert “, in the same frame”. |
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