Strong correlations in lossy one-dimensional quantum gases: From the quantum Zeno effect to the generalized Gibbs ensemble

We consider strong two-body losses in bosonic gases trapped in one-dimensional optical lattices. We exploit the separation of timescales typical of a system in the many-body quantum Zeno regime to establish a connection with the theory of the time-dependent generalized Gibbs ensemble. Our main result is a simple set of rate equations that capture the simultaneous action of coherent evolution and two-body losses. This treatment gives an accurate description of the dynamics of a gas prepared in a Mott insulating state and shows that its long-time behavior deviates significantly from mean-field analyses. The possibility of observing our predictions in an experiment with Yb174 in a metastable state is also discussed

Observation and stabilization of photonic Fock states in a hot radio-frequency resonator

Detecting weak radio-frequency electromagnetic fields plays a crucial role in a wide range of fields, from radio astronomy to nuclear magnetic resonance imaging. In quantum optics, the ultimate limit of a weak field is a single photon. Detecting and manipulating single photons at megahertz frequencies presents a challenge because, even at cryogenic temperatures, thermal fluctuations are appreciable. Using a gigahertz superconducting qubit, we observed the quantization of a megahertz radio-frequency resonator, cooled it to the ground state, and stabilized Fock states. Releasing the resonator from our control, we observed its rethermalization with nanosecond resolution. Extending circuit quantum electrodynamics to the megahertz regime, we have enabled the exploration of thermodynamics at the quantum scale and allowed interfacing quantum circuits with megahertz systems such as spin systems or macroscopic mechanical oscillators.QN/Steele LabQCD/DiCarlo LabImPhys/Practicum suppor

(n,Xn) measurements at 96 MeV

International audienceDouble differential cross section for neutron production were measured in 96MeV neutrons induced reactions at the TSL laboratory in Uppsala (Sweden). Measurements for Fe and Pb targets were performed using simultaneously two independent setups: DECOI-DEMON and CLODIA-SCANDAL. The double differential cross section were measured for an angular range between 15 and 100 degrees and with low-energy thresholds (1–2 MeV). Elastic distribution, angular distribution, energy distribution and total inelastic cross section were derived from measured double differential cross section. Results are compared with predictions given by several simulation codes and with other experimental data

Measurement of the ratio between the capture and the fission cross sections of 233U

The EFNUDAT (European Facilities for Nuclear Data Measurements) project workshop was held from April, 28-30, 2009 at EC-JRC-IRMM, Geel, Belgium. These proceedings collect the full papers summarising the contributions to this workshop.JRC.DDG.D.5-Neutron physic

Final Summary Report on Target Design

The present document is the D13 deliverable report of work package 1, Target Development, from the MEGAPIE TEST project of the 5th European Framework Program. Deliverable D13 is the final summary report on the activities performed within WP 1. The manufacturer (ATEA) has indicated to deliver the target to PSI in the middle of 2005. Assuming that this date is realistic, it can be foreseen that the integral out-of beam test will be conducted during the end of the year 2005 and the beginning of the year 2006. It can be assumed that the irradiation of the MEGAPIE target will start during the second quarter of 2006. The content of the present work package 1 final summary report reflects the status of the MEGAPIE target and ancillary system development at the end of 2004