Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical charge susceptibility in non-equilibrium double quantum dots   Double quantum dots are one of the promising two-state quantum systems for
realizing qubits. In the quest of successfully manipulating and reading
information in qubit systems, it is of prime interest to control the charge
response of the system to a gate voltage, as filled in by the dynamical charge
susceptibility. We theoretically study this quantity for a non-equilibrium
double quantum dot by using the functional integral approach and derive its
general analytical expression. One highlights the existence of two lines of
maxima as a function of the dot level energies, each of them being split under
the action of a bias voltage. In the low frequency limit, we derive the
capacitance and the charge relaxation resistance of the equivalent quantum
RC-circuit with a notable difference in the range of variation for R depending
on whether the system is connected in series or in parallel. By incorporating
an additional triplet state in order to describe the situation of a double
quantum dot with spin, we obtain results for the resonator phase response which
are in qualitative agreement with recent experimental observations in spin
qubit systems. These results show the wealth of information brought by the
knowledge of dynamical charge susceptibility in double quantum dots with
potential applications for spin qubits.

24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas