Edge-state Fabry-Perot interferometer as a high sensitivity charge detector
arXiv:0806.0913 · doi:10.1103/PhysRevB.79.233302
Abstract
We present a scheme for high sensitivity charge detection in the integer quantum Hall regime using two point contacts in a series. The setup is an electronic analog of an optical Fabry-Perot interferometer. We show that for small transmission through the point contacts the sensitivity of the interferometer is very high due to multiple reflections at the point contacts. The sensitivity can be further enhanced twice by using electrons in spin entangled state. We show that for point contacts having different reflection probabilities, the interferometer can be tuned for the quantum limited measurement.
4 pages 2 fig, submitted to PRL
References in corpus (13)
- Using a quantum dot as a high-frequency shot noise detector
- Quantum-Limited Measurement and Information in Mesoscopic Detectors
- Relaxation and Zeno effect in qubit measurements
- Quantum computers based on electron spins controlled by ultra-fast, off-resonant, single optical pulses
- Resonant dephasing in the electronic Mach-Zehnder interferometer
- Continuous quantum measurement with independent detector cross-correlations
- Quantum mechanical complementarity probed in a closed-loop Aharonov-Bohm interferometer
- Quantum transport in electron Fabry-Perot interferometers
- Qubit measurements with a double-dot detector
- Bulk-edge coupling in the non-abelian quantum Hall interferometer
- Experimental realization of a Fabry-Perot-type interferometer by co-propagating edge states in the quantum Hall regime
- Entanglement, measurement, and conditional evolution of the Kondo singlet interacting with a mesoscopic detector
- Dephasing and Measurement Efficiency via a Quantum Dot Detector