Understanding Quantum Computing and Qubits

The video explores the differences between classical and quantum computing, focusing on the use of qubits. It explains how qubits are created using the outermost electron of a phosphorous atom embedded in silicon, and how they are manipulated using magnetic fields and microwaves. The video also discusses the use of the nucleus as a qubit, which offers long-term stability. The importance of using silicon 28 for qubit stability is highlighted, and the video concludes with a sponsorship message from Audible.

What is a key advantage of quantum computers over classical computers?

• They use less energy.

• They can solve complex problems much faster.

• They are more widely available.

• They are cheaper to build.

What is used to create a qubit in the discussed research?

• A silicon atom

• A phosphorous atom

• A hydrogen atom

• A carbon atom

How is information written onto a qubit?

• By applying a magnetic field

• By using a laser

• By changing its temperature

• By hitting it with a pulse of microwaves

What role does the transistor play in reading qubit information?

• It cools the system.

• It detects the energy state of the electron.

• It amplifies the signal.

• It provides a magnetic field.

What is the purpose of cooling the apparatus to near absolute zero?

• To make the system more efficient

• To increase the electron's energy

• To ensure the electron remains in the spin down state

• To reduce the size of the apparatus

What is a unique property of the nucleus of a phosphorous atom used as a qubit?

• It cannot be isolated.

• It is highly magnetic.

• It is 2000 times weaker than an electron's spin.

• It has no spin.

How does the nucleus affect the electron's response in a qubit system?

• It decreases the electron's spin.

• It changes the electron's charge.

• It alters the electron's frequency response.

• It increases the electron's energy.

Why is silicon 28 preferred in quantum computing?

• It is cheaper to produce.

• It is more abundant.

• It is more reactive.

• It has no nuclear spin.

What project is associated with the production of isotopically pure silicon 28?

• The Nuclear Spin Reduction Program

• The Quantum Computing Initiative

• The Silicon Purity Project

• The Avogadro project

What is the main challenge in using natural silicon for qubits?

• It is too expensive.

• It is too reactive.

• It is not conductive enough.

• It contains isotopes with nuclear spin.