1,580 research outputs found
Quantum criticality in disordered bosonic optical lattices
Using the exact Bose-Fermi mapping, we study universal properties of
ground-state density distributions and finite-temperature quantum critical
behavior of one-dimensional hard-core bosons in trapped incommensurate optical
lattices. Through the analysis of universal scaling relations in the quantum
critical regime, we demonstrate that the superfluid to Bose glass transition
and the general phase diagram of disordered hard-core bosons can be uniquely
determined from finite-temperature density distributions of the trapped
disordered system.Comment: 4 pages, 5 figure
Self-protected nanoscale thermometry based on spin defects in silicon carbide
Quantum sensors with solid state electron spins have attracted considerable
interest due to their nanoscale spatial resolution.A critical requirement is to
suppress the environment noise of the solid state spin sensor.Here we
demonstrate a nanoscale thermometer based on silicon carbide (SiC) electron
spins.We experimentally demonstrate that the performance of the spin sensor is
robust against dephasing due to a self protected machenism. The SiC thermometry
may provide a promising platform for sensing in a noisy environment ,e.g.
biological system sensing
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