Table 2 Qubit array parameters

From: Synchronous detection of cosmic rays and correlated errors in superconducting qubit arrays

 

Qubit

Readout

T1 = 1/Γ1

Junction

Recovery

 

Frequency (GHz)

Frequency (GHz)

(μs)

placement

(ms)

Q1

4.534

6.759

\(5{3}_{-10}^{+9}\)

A

5.9

Q2

4.370

6.648

\(4{9}_{-14}^{+8}\)

A

6.6

Q3

4.949

6.889

\(4{2}_{-9}^{+9}\)

B

0.8

Q4

4.697

6.789

\(1{6}_{-2}^{+1}\)

A

6.5

Q5

4.453

6.693

\(4{0}_{-6}^{+6}\)

A

6.0

Q6

5.015

6.926

\(4{3}_{-8}^{+7}\)

B

0.8

Q7

4.840

6.825

\(5{7}_{-17}^{+16}\)

B

0.7

Q8

4.501

6.729

\(5{5}_{-16}^{+11}\)

A

6.5

Q9

5.155

6.960

\(6{9}_{-11}^{+11}\)

B

0.7

Q10

4.916

6.853

\(4{7}_{-9}^{+8}\)

B

0.8

  1. The column “JJ placement” indicates the location of the Dolan bridge Josephson junction relative to transmon capacitor and ground plane (see Fig. 7); “A” indicates that the 30 nm electrode L4 is on the ground-plane-side of the junction, whereas “B” indicates that the 150 nm electrode L1 is on the ground-plane-side of the junction. The “Recovery” column reports the time constant of decay rate dynamics averaged over all events.