Quantum Measurement of the State of a Coherently Coupled Dot Device
- 520 Downloads
One limit on the performance of a quantum computer is unambiguous readout of data encoded in the qubit states. We analyze a method to measure the states of a coherently coupled dot device (qubit) using a single electron transistor. We derive a master equation to describe the unconditional evolution of the qubit when the measured records are averaged over, and a conditional stochastic master equation describes the conditional evolution of the qubit. The results from both descriptions are consistent.
KeywordsMaster Equation Quantum Measurement Noise Spectrum Qubit State Noise Power Spectrum
Unable to display preview. Download preview PDF.