Table 1 Detailed characteristics of the individual spins in the system

From: Modeling quantum volume using randomized benchmarking of Room-Temperature NV center quantum registers

Spin

electron spin

14N

13C1

13C2

Azz

-

2 MHz

414 kHz

90 kHz

Rabi period

1.10 μs

55.13 μs

29.69 μs

30.28 μs

Rabi contrast

 

0.890

0.909

0.956

T1

2.22 ms

>100 s29

>100 s29

>100 s29

T2

429 μs

≈1.5T1,e29

≈1.5T1,e29

≈1.5T1,e29

\({T}_{2}^{* }\)

12.85 μs

-

-

-

1 Qubit Epg

-

(4.4 ± 0.2) ⋅ 10−3

(1.6 ± 0.3) ⋅ 10−3

(1.0 ± 0.5) ⋅ 10−3

Qubit con.

N−C1

N− C2

C1−C2

 

2 Qubit Epg

(23 ± 1) ⋅ 10−3

(47 ± 4) ⋅ 10−3

(24 ± 4) ⋅ 10−3

 
  1. The Azz parameter describes the strength of the coupling term in the Hamiltonian. T1, T2, and \({T}_{2}^{* }\) represent the spin relaxation and dephasing characteristics. The Rabi contrast and period characterize the MW and RF drives of the nuclear spins. The one qubit error per gate (1-Qubit EPG) and the two-qubit error per gate (2-Qubit EPG) were measured using randomized benchmarking.
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