Qubit-in-a-Box · QiB0 · QiB1 · QiB2
A known-good qubit for your setup.
Packaged, wire-bonded superconducting chips with published performance. Plug one into your cryostat and find out whether the problem is your chip or your setup.
- SMA case · Gold-plated oxygen-free copper
- 2 × Female SMA
- M3 mounting holes, to the coldest plate
Which one do I need?
Three questions. The device that fits is marked in the comparison.
For a whole teaching lab, see Plug'N'Teach.
Recommended: QiB0. Four qubits for validating your setup.
Best for: validating a cryostat or measurement setup.
Or Plug'N'Teach for the whole lab.
QiB0 detailsRecommended: QiB1. Six qubits, three levels of control.
Best for: testing control hardware and software across qubit types.
Or Plug'N'Teach for the whole lab.
QiB1 detailsRecommended: QiB2. Two ways to couple qubits, on one chip.
Best for: studying two-qubit coupling; teaching.
Or Plug'N'Teach for the whole lab.
QiB2 detailsQiB1 or QiB2. Answer question 2 to choose.
QiB0 or QiB1. Answer question 1 to choose.
| QiB0Four qubits for validating your setup.Recommended | QiB1Six qubits, three levels of control.Recommended | QiB2Two ways to couple qubits, on one chip.Recommended | |
|---|---|---|---|
| Best for | Validating a cryostat or measurement setup | Testing control hardware and software across qubit types | Studying two-qubit coupling; teaching |
| Qubits | 4 fixed-frequency | 6: fixed and tunable, two transmon styles | 7: two coupled pairs + 3 single |
| Couplers | — | — | 1 tunable, 1 fixed |
| Control lines | Readout only | Drive lines; flux lines on tunable qubits | Drive on 6 qubits; flux on all tunable elements |
| Qubit frequencies | 3–5 GHz | 3–5 GHz | 3–5.5 GHz |
| T1 | 90–130 µs avg, up to 256 µs | Reference device 56–151 µs | Up to 140 µs avg, up to 223 µs |
| Package | Gold-plated copper, 2 × SMA | Box20, 20 × SMPM | Box20, 20 × SMPM |
| Lines you need | 1 in, 1 out | Readout + 4 drive + 2 flux | Readout + 6 drive + 4 flux |
| QiB0 details | QiB1 details | QiB2 details |
- QiB0Recommended
Four qubits for validating your setup.
- Best for
- Validating a cryostat or measurement setup
- Qubits
- 4 fixed-frequency
- Couplers
- —
- Control lines
- Readout only
- Qubit frequencies
- 3–5 GHz
- T1
- 90–130 µs avg, up to 256 µs
- Package
- Gold-plated copper, 2 × SMA
- Lines you need
- 1 in, 1 out
- QiB1Recommended
Six qubits, three levels of control.
- Best for
- Testing control hardware and software across qubit types
- Qubits
- 6: fixed and tunable, two transmon styles
- Couplers
- —
- Control lines
- Drive lines; flux lines on tunable qubits
- Qubit frequencies
- 3–5 GHz
- T1
- Reference device 56–151 µs
- Package
- Box20, 20 × SMPM
- Lines you need
- Readout + 4 drive + 2 flux
- QiB2Recommended
Two ways to couple qubits, on one chip.
- Best for
- Studying two-qubit coupling; teaching
- Qubits
- 7: two coupled pairs + 3 single
- Couplers
- 1 tunable, 1 fixed
- Control lines
- Drive on 6 qubits; flux on all tunable elements
- Qubit frequencies
- 3–5.5 GHz
- T1
- Up to 140 µs avg, up to 223 µs
- Package
- Box20, 20 × SMPM
- Lines you need
- Readout + 6 drive + 4 flux
Measured reference devices
Datasheets show a measured reference device. Individual characterisation on request.
QiB0CS_QIB0_30 MeasuredQiB0 datasheet v2.010 Oct 2025QiB1QiB1-010 MeasuredQiB1 datasheet v1.126 May 2026QiB2QiB2-015 MeasuredQiB2 datasheet v2.2
T1 per qubit and coupler (outlined bar), on the same 0–300 µs axis for every device. The longest bar on each chart is marked.
Used by the people who build cryostats
- QiB0
Bluefors and QphoX
Used QiB0 to compare optical–microwave conversion with microwave control of a transmon.
- QiB0
Kiutra
Used QiB0 to show how to optimise qubit performance in their L-Type Rapid cryostat.
Application note
- QiB2
Niels Bohr Institute
Runs QiB2 in its Quantum Training Lab.
Ordering
- QiB0
- from €8,900
- QiB1
- from €14,900
- QiB2
- from €19,800
- Lead time
- 6–8 weeks
- North America
- Order through our distributor, Quantum Microwave.
Shipping and export control
Our quantum devices are EU dual-use items (category 3A001). Every order needs a signed End-User Statement before shipping. Within the EU, and to Australia, Canada, Iceland, Japan, Liechtenstein, New Zealand, Norway, Switzerland, the UK and the US, no individual licence is needed. Anywhere else needs an export licence, which adds time, so tell us your destination early and we'll start the paperwork with you.