问HN：量子计算值得我们为之努力吗？
我是一名量子计算（QC）领域的博士生，最近有些沮丧。在过去的几年里，我听到了很多关于我们领域发展的鼓舞人心的消息，这正是我选择在这个领域攻读博士学位的原因。
但随着我逐渐接近前沿，我发现了更多令人沮丧的事实。量子比特非常脆弱，甚至难以维持一天的稳定，数量也受到各种因素的限制。成本巨大，设备对环境变化极为敏感，甚至能感受到室温的微小气流。更不用说，目前发现的量子算法的有用应用寥寥无几。这些美好的愿景似乎变成了泡沫，随时可能破灭。
这让我对未来感到迷茫：我是否应该继续坚持这个领域？如果不继续，我还能去哪里？对我来说，最熟悉的就是量子力学，而这在几乎所有其他领域都是无用的。
绝望……
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I am a phd student in quantum computing(QC), and recently I am a little depressed. Over the past few years I have heard a lot of inspiring news about the development of our field, which is exactly the reason that I chose to persue a doctoral degree in this filed.<p>But as I got closer to the frontline, I found more frustrating facts. The qubits are fragile, hard to maintain even for a single day, and the number are limited by all kinds of factors. The cost is huge, the devices are sensitive enough to feel the draft of room temperature. Not to mention there are few useful applications discovered for quantum algorithms. The beautiful visions seem to become a bubble, and it could burst at any time.<p>That makes me feel lost about the future: whether I should stick on this field? If not, where can I go? The most familiar things to me is quantum mechanics, and it's useless for almost every other fields.<p>Desperate...