[Aspuru-Guzik Group List] [qip] QIP seminar, Nov 30, Shruti Puri

Shruti Puri (Yale) QIP Seminar @ MIT, 30-Nov-2018 1:30PM, 6C-402 Title: Quantum Error Correction with Biased Noise Cat-Qubits Abstract Many physical systems exhibit error channels that are strongly biased, that is, one type of error dominates the channel. Naively, in this case error correction becomes much easier and more hardware efficient. However, maintaining the bias while performing gates which do not commute with the dominant error is not possible with two-dimensional systems. In this talk, I will demonstrate a way to circumvent this using the non-trivial topology of a continuous family of Schrödinger cat-state qubits. These bosonic qubits can be experimentally realized in a driven non-linear (Kerr) oscillator and exhibit a phase-flip rate that is exponentially suppressed relative to the bit-flip rate. The phase of the drive provides a continuous parameter that permits topologically-protected realization of CNOT gates in a bias-preserving manner. I will present all the bias-preserving operations possible with these cat qubits and discuss how these can lead to efficient quantum error correction codes. _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip