Poissonian
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Noise spectroscopy of two-body loss as a probe of dynamical bulk viscosity in ultracold atomic gases
Announce Type: cross Abstract: We show that the correlated noise of the two-body loss current provides access to the dynamical bulk viscosity in weakly dissipative quantum gases. Starting from the Lindblad equation for weak inelastic losses, we derive the loss-current operator. After subtracting the leading Poissonian shot-noise background, the remaining noise power spectrum of two-body loss current is found proportional to the equilibrium correlation function of the contact operator.
A digital droplet microarray for measuring tolerance to antibiotics
Antibiotic tolerance enables populations of microbes to survive normally lethal antibiotic concentrations, increasing the likelihood of reinfection and facilitating the evolution of resistance. Tolerance measurements typically involve quantifying viable cells after antibiotic exposure. Existing methods range from accessible but low-throughput approaches, such as plate counting, to higher-throughput but semi-quantitative techniques, such as the TDtest.