**Sycamore** by Google, with 53 qubits (2019).

This is the first quantum computer to demonstrate quantum supremacy, meaning that it was able to solve a problem that would be exponentially more difficult for a classical computer.

**IonQ Quantum Computer** by IonQ, with 11 qubits (2022).

This is a trapped-ion quantum computer that uses individual atoms as qubits. It is one of the most commercially available quantum computers.

**IBM Q System One** by IBM, with 20 qubits (2019).

This is a superconducting quantum computer that uses Josephson junctions as qubits. It is one of the most widely used quantum computers for research.

**Rigetti Forest** by Rigetti Computing, with 128 qubits (2023).

This is a superconducting quantum computer that uses transmon qubits. It is one of the most powerful quantum computers in the world.

**D-Wave Advantage** by D-Wave Systems, with 128 qubits (2019).

This is a quantum annealing computer that uses qubits to solve optimization problems. It is not yet clear whether it can achieve quantum supremacy.

**Alpine Quantum Technologies PINE System** by Alpine Quantum Technologies, with 24 qubits (2021).

This is a neutral atom quantum computer that uses individual atoms as qubits. It is still under development, but it has the potential to be very powerful.

**Atom Computing Phoenix** by Atom Computing, with 100 qubits (2021).

This is a trapped-ion quantum computer that uses individual atoms as qubits. It is one of the most powerful trapped-ion quantum computers in the world.

**Microsoft StationQ** by Microsoft, with 112 qubits (2022).

This is a superconducting quantum computer that uses transmon qubits. It is one of the most powerful quantum computers in the world.

## **Universal Quantum ** by Universal Quantum, with 40 qubits (2023).

This is a photonic quantum computer that uses photons as qubits. It is one of the most promising photonic quantum computers in the world.

**Orion** by QC Ware, with 128 qubits (2023).

This is a superconducting quantum computer that uses transmon qubits. It is one of the most powerful quantum computers in the world.

Pasqal by Pasqal, with 10 qubits (2022).

Pasqal

This is a neutral atom quantum computer that uses individual atoms as qubits. It is still under development, but it has the potential to be very powerful.

**Xanadu Spruce** by Xanadu, with 128 qubits (2023).

This is a photonic quantum computer that uses photons as qubits. It is one of the most promising photonic quantum computers in the world.

PsiQuantum by PsiQuantum, with 100 qubits (2023).

PsiQuantum

This is a superconducting quantum computer that uses superconducting circuits as qubits. It is one of the most promising superconducting quantum computers in the world.

**ColdQuanta** by ColdQuanta, with 20 qubits (2022).

This is a neutral atom quantum computer that uses individual atoms as qubits. It is still under development, but it has the potential to be very powerful.

**Google Bristlecone** by Google, with 72 qubits (2022).

This is a superconducting quantum computer that uses transmon qubits. It is one

## Links to all project pages:5

- Sycamore by Google, with 53 qubits (2019)
- IonQ Quantum Computer by IonQ, with 11 qubits (2022)
- IBM Q System One by IBM, with 20 qubits (2019)
- Rigetti Forest by Rigetti Computing, with 128 qubits (2023)
- D-Wave Advantage by D-Wave Systems, with 128 qubits (2019)
- Alpine Quantum Technologies PINE System by Alpine Quantum Technologies, with 24 qubits (2021)
- Atom Computing Phoenix by Atom Computing, with 100 qubits (2021)
- Microsoft StationQ by Microsoft, with 112 qubits (2022)
- Universal Quantum by Universal Quantum, with 40 qubits (2023)
- Orion by QC Ware, with 128 qubits (2023)
- Pasqal Spruce by Pasqal, with 10 qubits (2022)
- Xanadu Spruce by Xanadu, with 128 qubits (2023)
- PsiQuantum by PsiQuantum, with 100 qubits (2023)
- ColdQuanta by ColdQuanta, with 20 qubits (2022)
- Google Bristlecone by Google, with 72 qubits (2022)