SPEAKER 1: In this lecture, we'll talk about systems of two qubits. These quantum systems exhibit a remarkable property called entanglement. And this property of entitlement plays a critical role in quantumcomputation. So in this and the next couple of lectures, we'll try to get an intuition for entanglement and what this property's all about. But...Learn More

UMESH VAZIRANI: In this lecture, we'll talk about the basic unit of quantum information--qubit. So let's start with a thought experiment. Let's suppose that we want to represent a bit using the state of an electron. So how would we do this? So let's recall something. The energy of an electron in an atom is quantized. Well, what does this mean?...Learn More

UMESH V. VAZIRANI: In the last lecture, we spoke about entanglement, the EPR paradox, and Einstein's ideas about how quantum mechanics is an incomplete theory. In this lecture, we'll talk about John Bell's landmark paper from 1965, about 30 years later, showing that entanglement has testable effects, that you can actually test Einstein's beliefs...Learn More