CRYOGENIC THERMOMETER BASED ON A TWO-LEVEL SYSTEM (TLS)

FLC Business Search CRYOGENIC THERMOMETER BASED ON A TWO-LEVEL SYSTEM (TLS)

CRYOGENIC THERMOMETER BASED ON A TWO-LEVEL SYSTEM (TLS)

We have invented a new type of cryogenic thermometer (referred to as two-level-system thermometer or TLS-thermometer) for measurement of temperature below 1 Kelvin. The device consists of a superconducting micro-resonator with dielectric materials containing two-level systems deposited or naturally formed on the surface. The temperature is read out by measuring the resonance frequency of the resonator, which depends sensitively on temperature and the dependence follows a well-understood analytical curve. This thermometer can be frequency multiplexed into existing microwave devices and readout systems without additional dedicated wiring.

Patent Abstract: 

We have invented a new type of cryogenic thermometer for use at temperature below 1 Kelvin. The device consists of a superconducting resonator with dielectric two-level systems (TLS) material deposited or naturally formed on the surface. The temperature is read out by measuring the resonance frequency of the resonator, which sensitively depends on temperature and the dependence follows a well-understood analytical curve. The thermometer is very compact and can be attached without DC wiring to other cryogenic microwave devices. It is particularly suitable for use with superconducting detectors and qubits.

Inventors: 

Vissers, Michael; Gao, Jiansong; Wheeler, Jordan; Malnou, Maxime Bernard Jacques

Internal Laboratory Ref #: 
20-060
Patent Status: 
Published Patent Application
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