Through the combined effect of flexoelectricity and piezoelectricity, resarchers at the ICN2 and the UAB discovered that polar materials can be made more or less resistant to dents when they are turned upside down, or when a voltage is applied to switch their polarisation. Read more
UAB researchers design the most precise quantum thermometer to date
Physicists at the UAB have found the “formula” to construct a quantum thermometer with enough precision to detect minute fluctuations in temperature in regions as small as the inside of a cell. The research appears today in the journal Physical Review Letters.
Researchers from the UAB and the University of Nottingham, in an article published today in Physical Review Letters, have fixed the limits of thermometry, i.e., they have established the smallest possible fluctuation in temperature which can be measured. The researchers have studied the sensitivity of thermometers created with a handful of atoms, small enough to be capable of showing typical quantum-style behaviours.
The researchers characterised these types of probes in detail, devices which could provide an estimation of the temperature with a never before seen precision. To do so, they combined thermodynamic tools with quantum metrology, which deals with ultra-precise measures in quantum systems.
The physicists searched to find the maximum precision which could be achieved in a real situation, in which measuring time could be very brief given unavoidable experimental limitations. In the research, they also observed that these thermometers could maintain a constant sensitivity in a wide range of temperatures by sacrificing some of their precision.
For the authors of the research, “finding a nanothermometer sensitive enough at this scale is a great step forward in the field of nanotechnology, with applications in biology, chemistry, physics and even in the diagnosis and treatment of diseases”.
Researchers from the Centre for the Study of Prehistoric Archaeological Heritage (CEPAP-UAB) recently discovered several engravings from the Late Stone Age on the walls of the Cova Gran de Santa Linya, in the Noguera county of Lleida. These are the oldest artistic representations to have been discovered to date in Catalonia. Read more