Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-12-13
Phys. Rev. B 71, 140505(R) (2005)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 3 figures, a paragraph added to describe how the scheme works in charge regime
Scientific paper
10.1103/PhysRevB.71.140505
In a qubit system, the measurement operator does not necessarily commute with the qubit Hamiltonian, so that the readout process demolishes (mixes) the qubit energy eigenstates. The readout time is therefore limited by such a mixing time and its fidelity will be reduced. A quantum nondemolition readout scheme is proposed in which the charge of a flux qubit is measured. The measurement operator is shown to commute with the qubit Hamiltonian in the reduced two-level Hilbert space, even though the Hamiltonian contains non-commuting charge and flux terms.
No associations
LandOfFree
Quantum Nondemolition Charge Measurement of a Josephson Qubit does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum Nondemolition Charge Measurement of a Josephson Qubit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Nondemolition Charge Measurement of a Josephson Qubit will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-226426