Threads Tagged with commutator Thread / Thread Starter Last Post Replies Views Forum I know that the commutator of the position and momentum operators is ihbar. Can any other combination of two different... Nov20-13 02:00 PM lonewolf219 2 260 Quantum Physics 1. The problem statement, all variables and given/known data There are 3 tasks. 1) No other information is given.... Nov19-13 07:43 PM Catria 1 311 Advanced Physics Homework 1. The problem statement, all variables and given/known data Hello! I'm having troubles with this proof. given two... Nov15-13 05:04 PM Jreyes613 3 316 Advanced Physics Homework 1. The problem statement, all variables and given/known data For the SHO, find these commutators to their simplest... Oct15-13 11:31 AM Hakkinen 1 204 Advanced Physics Homework Consider the following commutator for the product of the creation/annihilation operators; = (2m(h/2∏)ω)^1 =... Oct10-13 09:13 PM lukka 2 501 Quantum Physics Two hermitian commutator anticommute: {A,B}=AB+BA=0.Is it possible to have a simultaneous eigenket of A and... Oct5-13 03:47 PM Jazzdude 1 232 Quantum Physics Hi. I'm trying to understand a derivation of the Bianchi idenity which starts from the torsion tensor in a torsion... Sep9-13 11:23 AM WannabeNewton 3 826 Differential Geometry The commutator of two operators A and B, which measures the degree of incompatibility between A and B, is AB - BA (at... Aug21-13 08:59 AM DeIdeal 12 411 Quantum Physics Hello, i try to prove that ∂μFμ\nu + igμ, Fμ\nu] = μ,Fμ\nu] with the Dμ = ∂μ + igAμ but i have a problem with... Jul30-13 08:15 AM oliveriandrea 2 221 Calculus & Beyond Homework I think most of them are replaced by brushless types or Induction Motor with VFD (variable frequency drive). Is there... Jul12-13 09:59 AM Windadct 12 501 Electrical Engineering 1. The problem statement, all variables and given/known data 2 total, Sz ∅1] 2. Relevant equations S2 total... May20-13 01:22 AM rsaad 0 454 Advanced Physics Homework I am new to group theory, and read about a "universal property of abelianization" as follows: let G be a group and... May1-13 07:48 AM dumbQuestion 2 420 Linear & Abstract Algebra 1. The problem statement, all variables and given/known data So we know that for two operators \hat{A} and \hat{B}... Apr26-13 01:22 PM FatPhysicsBoy 16 553 Calculus & Beyond Homework 1) Find the commutator subgroup of the Frobenius group of order 20. 2) I have the Cayley table. 3) What is the... Apr22-13 04:36 AM tiny-tim 1 208 Calculus & Beyond Homework 1. The problem statement, all variables and given/known data http://s13.postimg.org/mupmgjm3b/image.jpg 2.... Apr18-13 07:08 AM micromass 3 320 Advanced Physics Homework 1. The problem statement, all variables and given/known data Evaluate given =ih 2. Relevant equations Px =... Apr15-13 03:36 PM sudipmaity 8 333 Advanced Physics Homework 1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a... Apr14-13 02:50 PM sudipmaity 0 174 Advanced Physics Homework Greetings, I would like to find the commutator \left and prove that \left=\left=\left I infer from the cyclic... Apr9-13 06:35 AM Septim 11 867 Quantum Physics 1. The problem statement, all variables and given/known data Hello. I am supposed to find the commutator between... Mar13-13 03:19 AM Just Steve 4 260 Introductory Physics Homework For every operator ##A##, ##=0##. And if operators commute they have complete eigen- spectrum the same. But if I look... Mar6-13 11:11 AM Einj 4 439 Quantum Physics 1. The problem statement, all variables and given/known data Using (x,p) = i (where x and p are operators and the... Feb26-13 09:11 AM andrien 6 670 Advanced Physics Homework If ##\hat{n}=\hat{a}^+\hat{a}## is number operator and \hat{a}^+,\hat{a} are Bose operators. Is there then some... Jan15-13 06:29 PM strangerep 11 668 Quantum Physics What is the commutator \hat{A}\hat{B}, \hat{C}\hat{D}] equal to? How to distribute what's inside? Dec24-12 07:00 PM Fredrik 4 458 Quantum Physics 1. The problem statement, all variables and given/known data Analytic functions of operators (matrices) A are defined... Oct24-12 01:28 PM D H 5 951 Advanced Physics Homework 1. The problem statement, all variables and given/known data a, b are operators that commute with their commutator... Oct19-12 03:50 AM asantas93 3 1,079 Advanced Physics Homework 1. The problem statement, all variables and given/known data Prove that nB] =nAn-1 for integrer n , assume ]=0=] ... Oct15-12 12:34 AM gabbagabbahey 4 532 Advanced Physics Homework 1. For problem, see attached picture. 2. I know the basic commutation relation =AB-BA and if the two operators... Oct12-12 03:44 AM jkrivda 1 380 Advanced Physics Homework This isn't really a homework question, it came along in my studying of the chapter, but it is a homework "type"... Oct1-12 09:35 PM gabbagabbahey 5 755 Advanced Physics Homework 1. The problem statement, all variables and given/known data Prove the following for operators A and B. e^A B... Sep10-12 07:20 PM chill_factor 1 397 Calculus & Beyond Homework Hello friends! Im trying to get an geometric interpretation of QM and am now confused about the commutation relation... Sep9-12 02:53 PM Dickfore 2 806 Quantum Physics The usual answer to this question is that if the commutator between two observables A and B is zero, then there are... Aug23-12 07:20 AM Kraflyn 10 1,061 Quantum Physics reading that the commutator of rotations on two orthogonal axes is i * the rotation matrix for the third axis but... Jul15-12 02:57 PM BWV 2 905 Differential Geometry 1. The problem statement, all variables and given/known data Show that one can write U=exp(iC), where U is a unitary... Jul13-12 10:11 PM Latrace 1 2,035 Advanced Physics Homework Hi! In my textbook the explanation of the expectation value in general covering any observable Q is: ... Jul11-12 09:53 PM Fredrik 17 1,251 Quantum Physics So, in the calculation of D(t,r) = \left , where t= x^0 - y^0,~ \vec{r} = \vec{x} - \vec{y} you need to calculate... Jun16-12 05:34 PM praharmitra 0 496 Quantum Physics assuming that A B C D are all n\times n operators how to evaluate the commutator of direct product? May31-12 07:07 AM kith 1 905 Quantum Physics 1. The problem statement, all variables and given/known data Calculate 2. Relevant equations = PX - XP ... Apr22-12 03:17 PM Don'tKnowMuch 7 2,079 Advanced Physics Homework I found this theorem on Prasolov's Problems and Theorems in Linear Algebra: Let V be a \mathbb{C}-vector space and... Apr16-12 05:53 PM Hurin 0 699 Linear & Abstract Algebra I know how to use a commutator as a mathematical formula but I really don't understand what it means. Can anyone... Mar25-12 07:44 AM M Quack 1 578 Introductory Physics Homework 1. The problem statement, all variables and given/known data Hi I want to find the commutator between the momentum... Feb27-12 10:39 AM Niles 2 637 Advanced Physics Homework