May 10Grover’s algorithmClassical problem statement: [2] Quantum problem statement: [3] Grover’s algorithm outline: [4] The magic of quantum computing is that the state of our system doesn’t have to be classical states. It could be superposition of classical states. If we apply operator to a superposition of classical states, it’s as if…3 min read

May 6Entanglement— An intuitive explanation Forget the mug and T-shit example. I don’t think that’s a proper analogy. Source: [1] https://www.youtube.com/watch?v=unb_yoj1Usk1 min readEntanglement— An intuitive explanationForget the mug and T-shit example. I don’t think that’s a proper analogy.Source:[1] https://www.youtube.com/watch?v=unb_yoj1Usk----

May 4Deutsch Jozsa AlgorithmAn intuitive interpreatation2 min readDeutsch Jozsa AlgorithmAn intuitive interpreatationInput is a balanced/unbalanced function, the output is the balanced/unbalanced label.----

May 2Errors, Error Corrections, Calibrations, and Error SimulationErrors (T1/T2/Readout Errors/Gate Errors)5 min read

Apr 26A two level system with time-dependent perturbationA two level system: Then we can write for any ψ(t)，4 min read

Apr 20Circuit Quantum Electrodynamics (Circuit QED)The above Hamiltonian can be rewritten as:3 min read

Apr 19Quantum OperatorsAn operator is a mathematical object tha allows us to describe physical properties in quantum mechanics. For example, the position operator describes where a particle is; momentum operator describes the momentum of a particle; and the energy operator describes the energy of a particle. Postulate II.7 min read

Apr 17Quantum Harmonic OscillatorQuantum harmonic oscillator is a system with a potential energy that depends quadratically on the amplitude. The potential energy of one-dimensional harmonic oscillator is: The force excerted on the particle is:4 min read

Apr 15Newtonian, Lagrangian and HamiltonianSuppose we have a particle of mass m hanging from a lightweight rod(杆) of length l, which is attahced to a pivot at the other end, we use can a arc length coordinate s that runs along the circumference of the circle traced out by the circle or we can…4 min read