Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron spin relaxations of phosphorus donors in bulk silicon under
  large electric field   Modulation of donor electron wavefunction via electric fields is vital to
quantum computing architectures based on donor spins in silicon. For practical
and scalable applications, the donor-based qubits must retain sufficiently long
coherence times in any realistic experimental conditions. Here, we present
pulsed electron spin resonance studies on the longitudinal $(T_1)$ and
transverse $(T_2)$ relaxation times of phosphorus donors in bulk silicon with
various electric field strengths up to near avalanche breakdown in high
magnetic fields of about 1.2 T and low temperatures of about 8 K. We find that
the $T_1$ relaxation time is significantly reduced under large electric fields
due to electric current, and $T_2$ is affected as the $T_1$ process can
dominate decoherence. Furthermore, we show that the magnetoresistance effect in
silicon can be exploited as a means to combat the reduction in the coherence
times. While qubit coherence times must be much longer than quantum gate times,
electrically accelerated $T_1$ can be found useful when qubit state
initialization relies on thermal equilibration.

26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ