# Questions tagged [games]

For games or puzzles which utilize the principles of quantum mechanics. This includes (but is not limited to) non-local games, which are cooperative games of incomplete information, include strategies that make use of entanglement, outperforming all possible classical strategies. Non-local games were introduced by Cleve et.al in 2004. (arXiv:quant-ph/0404076)

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### How can quantum computing win 97% of times in coin flipping experiment?

I'm new to this field of science. I'm curious about how quantum computing can win 97% of times in a coin flipping experiment? Refer this link: Ted Talk by Shohini Ghose To give an idea about how ...
112 views

### Why is $P(1,2)_{\text{same}} = \frac{1}{4}$ and not $\frac{1}{2}$ in Preskill's Bell experiment?

Context: Three coins on the table. Each is either heads or tails. You can uncover any one of the three coins, revealing whether it is heads or tails but then you choose two the other two coins ...
777 views

### Optimal strategy to a quantum state game

Consider the following game: I flip a fair coin, and depending on the outcome (either heads/tails), I'll give you one of the following states: |0\rangle \text{ or } \cos(x)|0\rangle + \sin(x)|1\...
265 views

### Proof of optimality for CHSH game classical strategy

I'm aware that the optimality of the quantum strategy for the CHSH game is given by Tsirelson's bound, but presentations all skip over the (admittedly much less interesting) proof of the classical ...
245 views

### Are correlations stronger than those allowed by quantum mechanics possible?

We know how a quantum correlation setup can help us with a better probability of winning games like the CHSH. But what is the upper bound that physics can allow? Is it the quantum correlation setup? ...
105 views

### Quantum Nimber Maths

I am interested in quantum combinatorial games. According to the Wikipedia page on the Sprague-Grundy theorem: Every impartial game under the normal play convention is equivalent to a nimber ...
56 views

### Photonic CHSH Games

How can a CHSH game be realized in a photonic circuit?
93 views

### Using XOR games to benchmark quantum computers

In an answer to a previous question, What exactly are Quantum XOR Games?, ahelwer states: One application of xor games is self-testing: when running algorithms on an untrusted quantum computer, you ...
455 views

### What exactly are Quantum XOR Games?

I have done some research & found a few different papers that discuss xor games (classic & quantum). I am curious if someone could give a concise introductory explanation as to what exactly ...
57 views

### How are nonlocal games used in device-independent quantum cryptography?

As I understand it, device-independent quantum cryptography enables you to safely perform cryptographic operations without necessarily trusting the quantum device on which they are performed. Nonlocal ...