Resonating Valence Bond RVB

The even-leg ladders show a spin-liquid ground state described by a Resonance Valence Bond (RVB) state introduced by P.W. Anderson m[25] such system may be efficiently described by using a direct-space method as the DMRG and RVA ones. In this note, we will consider only the simplest even-leg ladder, the two-legladder, and we will describe it with the simplest RVB state, the Dimer-RVB state where the elementary singlets are between two nearest-neighbour sites. This problem is easily solved by... 

The Yamanouchi-Kotani basis is best suited if we want to solve the Heisenberg problem in the complete spin space. However, the number of spins that can be handled this way, soon reaches an end due to the rapid growth of the spin space dimension f(S,N). Even with the present day computers, the maximum number of spins that can be treated clusters around N = 30. For larger values of N one must resort to approximate treatments, one of which, as described hereafter, is based on the idea of resonating valence bonds (RVB) coming from the classical VB model developed by Pauling and Wheland back in the early 1930 s [37, 51]. In essence,... 

Within weeks of the confirmation of the discovery of high temperature superconductivity in the cuprates by Bednorz and Muller, Anderson[l] suggested an explanation of the phenomena and called it resonating valence bonds (RVB). Despite an enormous theoretical effort by the international scientific community, systematic or consistent theoretical results have been hard to obtain on this idea for the model proposed by Anderson for the cuprates. When some specific predictions were made based on the general ideas or approximate calculations, experiments did not conform. 

In the following section, two mainstream theoretical concepts will be briefly described, namely the resonating valence bond (RVB) theory of Anderson, and Varma s pairing model of quantum critical fluctuation (QCF), as the origin of high-Tc superconductivity. 

Anderson P (2(X)8) Who or what is RVB Physics Today 8-9 April 2008 (RVB = Resonance Valence Bond)... 

RVB resonating valence bond Oc Curie temperature (ferromagnetic... 

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