Dynamically turning off interactions in a two component condensate

We propose a mechanism to change the interaction strengths of a two component condensate. It is shown that the application of pi/2 pulses allows to alter the effective interspecies interaction strength as well as the effective interaction strength between particles of the same kind. This mechanism provides a simple method to transform spatially stable condensates into unstable once and vice versa. It also provides a means to store a squeezed spin state by turning off the interaction for the internal states and thus allows to gain control over many body entangled states.Comment: 7 pages 5 figures, symbols changed, minor changes, to appear in Phys. Rev.

DH-4 Airplane

Front left view of recently completed DH-4 aircraft on the flight line at Moraine.https://corescholar.libraries.wright.edu/special_sc347/1013/thumbnail.jp

Aerial view of Clouds

An aerial view of clouds and some aircraft rigging from the right side of the rear cockpit. Circa 1917-1919.https://corescholar.libraries.wright.edu/special_sc347/1017/thumbnail.jp

Wreckage of a Curtiss JN-4 Jenny Biplane

Several soldiers observe the wreckage of a Curtiss JN-4 “Jenny” biplane, a trainer which has crashed into a hangar door outrigger at McCook Field, Dayton, Ohio. Original caption reads: “McCook Field, Dayton, Ohio, First World War, 1917. Plane crashed into hangar door.”https://corescholar.libraries.wright.edu/special_sc347/1001/thumbnail.jp

Entryway of Hills and Dales Country Club

Two women stand at the entryway to Hills and Dales Country Club, Dayton, Ohio. The woman on the left is identified as Helen Irwin (later wife of Wilbur Bigelow). Circa 1917.https://corescholar.libraries.wright.edu/special_sc347/1002/thumbnail.jp

Trees and a Body of Water

An unidentified photo of a stream or river with trees growing from small islands within the body of water circa 1917.https://corescholar.libraries.wright.edu/special_sc347/1008/thumbnail.jp

Waterfall

An unidentified photo of a waterfall and guard railing circa 1917.https://corescholar.libraries.wright.edu/special_sc347/1004/thumbnail.jp

Mechanic Charles Irwin

Mechanic Charles Irwin standing next to the DH-4’s propeller. Writing on propeller reads: “Test Propeller #128(?). Return to Motor Assembly.https://corescholar.libraries.wright.edu/special_sc347/1025/thumbnail.jp

Mechanic Charles Irwin

Mechanic Charles Irwin standing at back left of the DH-4 next to the rear cockpit.https://corescholar.libraries.wright.edu/special_sc347/1026/thumbnail.jp

Back Left View of DH-4

Back left view of recently completed DH-4 aircraft on the flight line at Moraine. Hangars P-1 and P-2 can be seen in the background.https://corescholar.libraries.wright.edu/special_sc347/1022/thumbnail.jp