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Quantum computers are on the verge of becoming a commercially availablereality. They represent a paradigm shift in computing, with a steep learninggradient. The creation of games is a way to ease the transition for beginners.We present a game similar to the Poker variant Texas hold 'em with theintention to serve as an engaging pedagogical tool to learn the basics rules ofquantum computing. The concepts of quantum states, quantum operations andmeasurement can be learned in a playful manner. The difference to the classicalvariant is that the community cards are replaced by a quantum register that is"randomly" initialized, and the cards for each player are replaced by quantumgates, randomly drawn from a set of available gates. Each player can create aquantum circuit with their cards, with the aim to maximize the number of $1$'sthat are measured in the computational basis. The basic concepts ofsuperposition, entanglement and quantum gates are employed. We provide aproof-of-concept implementation using Qiskit. A comparison of the results forthe created circuits using a simulator and IBM machines is conducted, showingthat error rates on contemporary quantum computers are still very high. For thesuccess of noisy intermediate scale quantum (NISQ) computers, improvements onthe error rates and error mitigation techniques are necessary, even for simplecircuits. We show that quantum error mitigation (QEM) techniques can be used toimprove expectation values of observables on real quantum devices.

Quantum Poker A game for quantum computers suitable for benchmarking error mitigation techniques on NISQ devices