Quantum computing has been an up-and-down investment theme over the past few months. The rage kicked off when Alphabet ( GOOG 1.16%) ( GOOGL 1.13%) announced a breakthrough with its Willow quantum computing chip, and any stock associated with quantum computing rose on the news of the announcement.

The stock market roared higher last year, and some of the biggest gainers operate in one specific field: artificial intelligence (AI). The technology promises to revolutionize many industries -- from healthcare to automobiles -- with innovations such as AI-powered medical devices and autonomous driving systems.

Quantum computing offers mind-boggling problem-solving potential. Here are four ways to buy quantum computing stocks.

Many quantum computing stocks have risen well above Wall Street's price targets, but this one still has room to climb.

Alphabet subsidiary Google recently announced two major technical achievements with its Willow quantum computing chip. In response to the news, shares of Rigetti Computing (NASDAQ: RGTI) and D-Wave Quantum (NYSE: QBTS) during the next three weeks advanced 280% and 110%,

Quantum computing has suddenly become a buzzword on Wall Street. Ever since Alphabet (NASDAQ: GOOG) (NASDAQ: GOOGL) reported that it hit a new milestone with Willow, its new quantum chip, quantum stocks have been soaring.

Following tech giants such as Amazon (AMZN) and Nvidia (NVDA), enterprise software major SAP (SAP) has also joined the voices making a case for quantum computing. Sounding bullish about the technology,