Latest update

- Can unlimited liability companies be present at the stock exchange?
- Error message when displaying algorithm
- Extra blank line at the end of a paragraph (reledpar / reledmac)
- Examples of luatex callback with lualatex
- bad format of an array using latex
- Tiny, tightly spaced, unnumbered footnotes in beamer presentation (possibly with columns)
- \gls in a special environment
- good way to horizontally align enumerate items
- Unicode encoding problem in ogo2ogr GeoJSON export from PostGIS
- Geoserver polygon labeling Arabic numbers using SLD
- Random selection of points in SpatialPointsDataFrame R object with distance constraint
- Heatmap of events, I can't get the right resolution
- How to wire switch for outside motion sensing light
- Reconstructing a non-$\omega$-categorical countable structure from its automorphism group
- Proof: if there is path independence in a vector field F on an open connected region D, then F is conservative ?
- Stirling numbers Sum
- How to prove isomorphism for rings in Galois Theory?
- Conditional Probability — Card Question
- Does the dynamics of this Fund follow a GBM?
- Is my transformation of (A∨B∨C)∧(¬A∨(¬C∧¬B) to get disjunctive NF (using distributive law) right?

# Is it possible to obtain quasiparticle spectrum from standard Hamiltonian spectrum?

2018-03-21 11:17:48

In many papers one can finds quasiparticle energy $\mathcal E_n$ spectrum for BCS like Hamiltonian $\hat H$ (with eigenvalues $E_n$), which is ussualy obtained from diagonalisation of transformed Hamiltonian $\hat H$ into BdG formalism $\hat{\mathcal{H}}_{\text{BdG}}$.

For example figure 7 from: https://arxiv.org/pdf/1510.07737.pdf.

Is it possible to construct similar spectrum $\mathcal E_n$ using energy spectrum $E_n$ of not transformed Hamiltonian $\hat H$?