Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-electron states of a group V donor in silicon from atomistic full
  configuration interaction   Two-electron states bound to donors in silicon are important for both two
qubit gates and spin readout. We present a full configuration interaction
technique in the atomistic tight-binding basis to capture multi-electron
exchange and correlation effects taking into account the full bandstructure of
silicon and the atomic scale granularity of a nanoscale device. Excited
$s$-like states of $A_1$-symmetry are found to strongly influence the charging
energy of a negative donor centre. We apply the technique on sub-surface
dopants subjected to gate electric fields, and show that bound triplet states
appear in the spectrum as a result of decreased charging energy. The exchange
energy, obtained for the two-electron states in various confinement regimes,
may enable engineering electrical control of spins in donor-dot hybrid qubits.

28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics