259 reputation
322
bio website dftuz.unizar.es/~rivero/…
location Zaragoza, Spain
age 46
visits member for 3 years, 3 months
seen 23 hours ago

Nov
22
comment Can a car get better mileage driving over hills?
I am a bit surprised that a brachistochrone with friction and drag is not mentioned even as a comparative example, in any of the answers.
Nov
21
comment Can a car get better mileage driving over hills?
two towns or three towns? Is the flat road doing some curve around the hills, then?
Nov
17
comment How does the Kinect device work?
This question was about the first version of the device. Note that Kinect 2.0 uses tech from Microsoft, not the one of PrimeSense anymore. In fact, rumour is that now they are going to use Time-of-Flight
Nov
11
comment Renormalization of Composite Chiral Superfields
Yep, please elaborate
Nov
1
awarded  Yearling
Oct
20
comment Is it possible to recover the old Bohr-Sommerfeld model from the QM description of the atom by turning off some parameters?
As you are asking by Sommerfeld model too, an interesting reading is L. C. Biedenharn ''The “Sommerfeld Puzzle” revisited and resolved''
Sep
5
comment Penrose's Zig-Zag Model and Conservation of Momentum
Is it related to Feynman "checkerboard" zig-zag?
Aug
30
comment How does one show using QED that same/opposite electric charges repel/attract each other, respectively?
If Physics is about mathematical models, it does not damage to add the mathematical model in the answer.
Aug
23
comment Does an antiDeSitter space compensate the vacuum energy?
So, the answer is that it is possible to add both contributions, from AdS and from electroweak vacuum, and that this is not a new finding but standard lore?
Aug
23
asked Does an antiDeSitter space compensate the vacuum energy?
Aug
16
comment Alejandro Rivero's correspondence: diquarks and mesons as superpartners of quarks and leptons
@riemannium from the formula, given that the angles are separated 120 degrees, the sum $m_1+m_2+m_3$ is equal to $6m_0$
Aug
4
accepted Readings of the detectors at Japan and Izu-Bonin-Mariana Trenches
Jun
21
accepted Is there an open oriented superstring?
Jun
19
revised Is there an open oriented superstring?
added 15 characters in body
Jun
19
comment Is there an open oriented superstring?
What about the strings between D-branes? Are they unoriented too, even if they have Chan-Paton labels?
Jun
17
comment Where did Schrödinger solve the radiating problem of Bohr's model?
It is also a minimal value for the change of angular momentum.
Jun
14
comment How general relativity gets to an inverse-square law
Here I always wonder about the role of Einstein-Hilbert tensor, which is always a 2-index tensor, for any number of dimensions.
Jun
14
comment N=1 v N=2 supermultiplets
I like your last remark about the gauge subsector.
Jun
14
asked Is there an open oriented superstring?
May
3
comment Readings of the detectors at Japan and Izu-Bonin-Mariana Trenches
Definitely it was a reference request. It was two years ago, but given that some new people seems to show interest, I will put some bounty points in.