Quantum power sensor and method of measuring power in transmission lines
AssigneeNpl Management Limited
InventorsOleg Vladimirovich Astafiev, Rais Shaikhaidarov, Vladimir Nikolaevich Antonov, Teresa Clare Hoenigl-Decrinis, Sebastian Erik De Graaf
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Abstract
A quantum power sensor has a two-level quantum system strongly coupled to a transmission line that supports a propagating wave. A method of measuring power in a transmission line includes coupling a two-level quantum system to the transmission line; and determining the coupling and the Rabi frequency of the two-level system.
Claims9
A quantum power sensor comprising a two-level quantum system coupled to a transmission line that supports a propagating wave;
- and an analyser for determining a coupling coefficient and a Rabi frequency of the two-level quantum system;
- and
- wherein the coupling coefficient is deduced by measuring a relative amplitude of a third and higher order mixing product and the Rabi frequency is measured by resonance fluorescence measurements;
- or
- wherein the coupling coefficient and the Rabi frequency are deduced by measuring a relative amplitude and frequency and power dependences of third and higher order mixing products as a result of driving the two-level system with two or more frequencies.
A method of measuring power in a transmission line, the method comprising:
- coupling a two-level quantum system to the transmission line;
- and
- determining a coupling coefficient and a Rabi frequency of the two-level system;
- wherein the coupling coefficient is deduced by measuring a relative amplitude of a third and higher order mixing product and the Rabi frequency is measured by resonance fluorescence measurements.
A method of measuring power in a transmission line, the method comprising:
- coupling a two-level quantum system to the transmission line;
- and
- determining coupling coefficient and a Rabi frequency of the two-level system;
- wherein the coupling and the Rabi frequency are deduced by measuring a relative amplitude and frequency and power dependences of third and higher order mixing products as a result of driving the two-level system with two or more frequencies.
Dependencies are inferred from the claim text.