Relaxation dynamics of an isolated large-spin Fermi gas far from equilibrium

A fundamental question in many-body physics is how closed quantum systems reach equilibrium. We address this question experimentally and theoretically in an ultracold large-spin Fermi gas where we find a complex interplay between internal and motional degrees of freedom. The fermions are initially prepared far from equilibrium with only a few spin states occupied. The subsequent dynamics leading to redistribution among all spin states is observed experimentally and simulated theoretically using a kinetic Boltzmann equation with full spin coherence. The latter is derived microscopically and provides good agreement with experimental data without any free parameters. We identify several collisional processes, which occur on different time scales. By varying density and magnetic field, we control the relaxation dynamics and are able to continuously tune the character of a subset of spin states from an open to a closed system.Comment: 18 pages, 9 figure

Engineering spin waves in a high-spin ultracold Fermi gas

We report on the detailed study of multi-component spin-waves in an s=3/2 Fermi gas where the high spin leads to novel tensorial degrees of freedom compared to s = 1/2 systems. The excitations of a spin-nematic state are investigated from the linear to the nonlinear regime, where the tensorial character is particularly pronounced. By tuning the initial state we engineer the tensorial spin-wave character, such that the magnitude and sign of the counterflow spin-currents are effectively controlled. A comparison of our data with numerical and analytical results shows excellent agreement.Comment: 9 pages, 4 figure

Updated April 26, 2002

This report provides an overview of the 2002 farm bill and an update status of the farm bill

Farm Economic Relief: Issues and Options for Congress

This report discusses issues regarding Agriculture funding and subsidies. In response to low prices, natural disasters, and other farm-related problems, Congress has, over 3 successive years, provided a total of about $23 billion in supplemental aid – in addition to funds already programmed through the 1996 farm bill (P.L. 104-127). The most recent aid was attached to a crop insurance reform bill signed into law on June 22, 2000 (P.L. 106-224). This Agriculture Risk Protection Act of 2000 includes$7.113 billion for additional farm income and related assistance, of which $5.5 billion is to be spent in FY2000

Updated March 13, 2002

This report provides an overview of the 2002 farm bill and an update status of the farm bill

The 2002 Farm Bill: Overview and Status

This report discusses the provisions of the 1996 farm bill, which was due to expire in 2002 but was extended (P.L. 107-171) for an additional 6 years on May 13, 2002

Farm "Counter-Cyclical Assistance"

This report discusses the reauthorization of major farm income and commodity price support programs that expire after crop year 2002. Many agricultural interests expect that a new “counter-cyclical assistance” program will be an integral component of future farm policy. The intent of counter-cyclical assistance is to provide more government support when farm prices and/or incomes decline, and less support when they improve

The 2002 Farm Bill: Overview and Status

The Federal Agriculture Improvement and Reform, or FAIR, Act of 1996 (commonly known as the "farm bill"), which was due to expire in 2002, is expected to be extended for another six years when President Bush signs the bill into law. This report discusses the provisions of the new "farm bill," including the federal spending involved

106th Congress

This report discusses issues regarding Agriculture funding, specifically the Federal Agriculture Improvement and Reform (FAIR) Act (P.L. 104-127), which prescribed farm commodity support policy through 2002