Twist - a new programming language for quantum computing

[jim bell]

https://analyticsindiamag.com/twist-a-new-programming-language-for-quantum-computing/#:~:text=Scientists%20from%20MIT's%20Computer%20Science,intuitive%20programs%2C%20with%20fewer%20bugs.

"Scientists from MIT’s Computer Science and Artificial Intelligence (CSAIL) have created Twist – a programming language for quantum computing. The language uses a concept called purity, which enforces the absence of entanglement and results in intuitive programs, with fewer bugs. Twist can describe and verify which pieces of data are entangled in a quantum program, using a language a programmer can understand.

"Programming quantum computers requires awareness of entanglement. When two qubits are entangled, actions on one qubit can change the value of the other, even when they are physically separated. This potency is also a source of weakness. While programming, discarding one qubit without being mindful of its entanglement with another qubit can destroy the data stored in the other. This jeopardises the correctness of the program. 

“Our language Twist allows a developer to write safer quantum programs by explicitly stating when a qubit must not be entangled with another,” said Charles Yuan, an MIT PhD student in electrical engineering and computer science and the lead author on a new paper about Twist. “Because understanding quantum programs requires understanding entanglement, we hope that Twist paves the way to languages that make the unique challenges of quantum computing more accessible to programmers.” 
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