New posts in Condensed Matter

How is it possible a quadratic Hermitian Hamiltonian $H = b^\dagger b^\dagger + b b$, with $b$ boson, cannot be diagonalized?

Are there Goldstone bosons in 1D or 2D?

Are quasi-particles really particles?

Quantum Hall Effect: Why the spikes of the longitudinal resistance appear every time when Hall conductance jumps?

If matter comes from energy, does this mean that energy has weight?

Non-uniqueness of the Order Parameter and its Critical Exponent

Why can't the $\mathbb{Z}_2$ invariant be defined with a determinant instead of a pfaffian?

How far do electrons actually move along a conductor under an alternating current?

Does a rock use up energy to maintain its shape?

Can amorphous solids have energy bands?