Hello! Just a short question about lightning.gpu device.
“Is lightning.gpu device basically a pure state simulator?”
thanks in advance!
Hi @ckckdud3 ,
Welcome to the Forum!
Yes, lightning.gpu is a pure state (Statevector) simulator. You can learn more about PennyLane simulators at the bottom of our performance page. Were you looking for a specific simulator?
Thanks for answering! I appreciate it 
I have been conducting experiments on quantum machine learning according to various schemes so far, and I found the training time to be slow! I thought the lightning.gpu device was a mixed state device. However, after referring to the mentioned reference and your response, I discovered that the lightning.gpu device is effective for more than about 20 qubits. Since I am currently experimenting with a much smaller number of qubits, I resolved this issue by using the default.qubit device.
Again, Thanks a lot!
I’m glad to hear @ckckdud3 !