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- Title
Experimental implementation of a nonthermalizing quantum thermometer.
- Authors
Raitz, C.; Souza, A.; Auccaise, R.; Sarthour, R.; Oliveira, I.
- Abstract
Based on a quantum interferometric circuit, we implement a NMR quantum thermometer, in which a probe qubit measures the temperature of a nuclear spin at thermal equilibrium with a bath. The whole procedure lasts 5.5 ms, a much shorter time than the probe's spin-lattice relaxation time, which is $$T_{1}=7.0\,\hbox {s}$$ . The fidelity of the probe final quantum state, in respect to the ideal theoretical prediction, is above 99 %. We show that quantum coherence is essential for the high fidelity of temperature measurement. We discuss the source of errors on the temperature measurement and some possible applications of the thermometer.
- Subjects
QUANTUM thermodynamics; THERMOMETER calibration; INTERFEROMETRY; QUANTUM optics; SPIN-lattice relaxation
- Publication
Quantum Information Processing, 2015, Vol 14, Issue 1, p37
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-014-0858-z