Krastanov Stefan, Heuck Mikkel, Shapiro Jeffrey H, Narang Prineha, Englund Dirk R, Jacobs Kurt
Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
Nat Commun. 2021 Jan 8;12(1):191. doi: 10.1038/s41467-020-20417-4.
Recent progress in nonlinear optical materials and microresonators has brought quantum computing with bulk optical nonlinearities into the realm of possibility. This platform is of great interest, not only because photonics is an obvious choice for quantum networks, but also as a promising route to quantum information processing at room temperature. We propose an approach for reprogrammable room-temperature photonic quantum logic that significantly simplifies the realization of various quantum circuits, and in particular, of error correction. The key element is the programmable photonic multi-mode resonator that implements reprogrammable bosonic quantum logic gates, while using only the bulk χ nonlinear susceptibility. We theoretically demonstrate that just two of these elements suffice for a complete, compact error-correction circuit on a bosonic code, without the need for measurement or feed-forward control. Encoding and logical operations on the code are also easily achieved with these reprogrammable quantum photonic processors. An extrapolation of current progress in nonlinear optical materials and photonic circuits indicates that such circuitry should be achievable within the next decade.
非线性光学材料和微谐振器的最新进展已使利用体光学非线性实现量子计算成为可能。这个平台备受关注，不仅因为光子学显然是量子网络的选择，还因为它是实现室温量子信息处理的一条有前景的途径。我们提出了一种用于可重新编程的室温光子量子逻辑的方法，该方法显著简化了各种量子电路的实现，特别是纠错电路的实现。关键元件是可编程光子多模谐振器，它仅利用体χ非线性极化率来实现可重新编程的玻色子量子逻辑门。我们从理论上证明，仅两个这样的元件就足以在玻色子码上构建一个完整、紧凑的纠错电路，而无需测量或前馈控制。利用这些可重新编程的量子光子处理器也能轻松实现码上的编码和逻辑运算。对非线性光学材料和光子电路当前进展的推断表明，这种电路在未来十年内应该是可以实现的。
