The space-time diagram is divided into four quadrants: the left and right Rindler wedges, and the future and past light cones. The vacuum state can be written as an interlocking state between Rindler wedges, or between light cones. For an observer in one of these quadrants (eg, the future), tracking unobserved patterns (eg, in the past) leads to the Unruh (time-similar) effect. The arrow represents the space-time path of the detector. attributed to him: physical review messages (2022). DOI: 10.1103/ PhysRevLett.129.160401
An international team of scientists including experts from the University of Adelaide has designed a quantum thermometer to measure the extremely cold temperatures of space and time predicted by Einstein and the laws of quantum mechanics.
The investigation was led by Dr James Koch of the University of Adelaide, Ramsey Fellow, School of Physical Sciences and Institute of Advanced Photonics and Sensing (IPAS).
We designed the sleeve Thermometer It can measure very slight changes in temperature.”
“The theoretical design of a quantum thermometer is based on the same technology used to build quantum computers.”
Einstein predicted that the rate at which you perceive time passing depends on the speed at which you travel: a person who moves very quickly ages at a slower rate than a person who stands still. This led to his theory of general relativity, which says that space and time work together as a tissue that can bend and twist.
The relationship between temperature and acceleration is similar to the relationship between time and speed. Different observers moving with different acceleration notice a different, albeit slight, difference in temperature.
In 1976, Canadian physicist William Onro combined Einstein’s work with the other fundamental theory of modern physics, Quantum mechanicsand predicted that the space-time fabric has an extremely low temperature,” said Dr.
“It is interesting that this temperature changes depending on the speed at which you are moving.
“To see this change in temperature, you have to move very fast. Until you see a 1 degree change in temperature You will have to approach the speed of light.
“So far, these extreme speeds have prevented researchers from verifying Unruh’s theory.”
Dr. Koach and colleagues Professor William Munro of NTT Basic Research Laboratories in Japan and Professor Timothy Ralph of the University of Queensland have published their work in the journal. physical review messages .
“Theoretically, a quantum thermometer does not need physical acceleration, but is used instead magnetic field To speed up the device’s internal energy gap,” Dr. Kwash says.
“The quantum thermometer can be built with current technology.”
The team’s work has important implications for future research. A quantum thermometer can be used to measure extremely cold temperatures with an accuracy that conventional thermometers cannot.
James Quach et al., Berry’s stage of entanglement of future and past light cones: discovering the Timelike Unruh effect, physical review messages (2022). DOI: 10.1103/ PhysRevLett.129.160401
University of Adelaide
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