0:00:07or
0:00:10i representation initially we sure where a person and where you can tell you about
0:00:16a quarter was also power michael however
0:00:23the paper is control of conditional one i think i do the clearance
0:00:31our experiment is less crime interference between indistinguishable pass
0:00:36to demonstrate ground state one
0:00:39we have data with this electronic interview little structure to available at that time each
0:00:44with three d models splits at levels with energy splitting dot e
0:00:49we start in a single zero ground state in
0:00:53by one or like we can try transition to and that was your state right
0:01:00after characteristic a time
0:01:02that indicate that are the grass to mandible and a simple song
0:01:07conservation of momentum allows to indicate that is
0:01:10and want to be here are those people's plusminus one states
0:01:16using coordination measurements a new method works on
0:01:19you can build rather than which electronically to an angle
0:01:24however are correlation interests cannot tell us which individual little electronic and it's a superposition
0:01:31unit was minus one states
0:01:34conditional on the detection of appropriate
0:01:38and seventy absorption of another over time from the right is or
0:01:41that is part of the superposition involves frequency proportional to energy splitting
0:01:47which is the opposite sign for each state in the superposition
0:01:53problems portion of the time from the try
0:01:55the superposition is coherently cited
0:01:57and stress first right now
0:02:00finally the atom to separate
0:02:03you single iteration measurements you'd order out of photons which hero indicate that and that
0:02:08equals your state
0:02:10the probability of this occurring equal to this where users you amplitude
0:02:15would you can be induced interference between arts assigned a solutions of the components of
0:02:21the relative position
0:02:23our data reflects the probability measure that conditional on the detection of first which pair
0:02:30of the relative position
0:02:32the data exhibits quantity into which gives as a measure of the coherence in the
0:02:37ground state position
0:02:40andreas number one at a more of our experimental and how women feedback mechanism to
0:02:46preserve coherence in the ground station
0:02:50this interference correspondingly that chris us introduce a can be experimentally realise using for example
0:02:58we have any five times which we can obtain
0:03:02to anatomically i and working i will explain a little bit more about the experimental
0:03:09part
0:03:11so we practise religion doesn't come nearly individually a pitch in little boxes run time
0:03:18i and so we use an alternate approach
0:03:22what we actually is the device that produces that these are
0:03:27and with an arrangement of lisa's a nine year old we only use quite intimate
0:03:33contact e
0:03:34we just analyzer small problem this task it but doesn't make the left and right
0:03:39many atoms that time and the outgoing what would be a scatter masks and i
0:03:43s
0:03:45so that we rely on a clever sure that uses something called not compactly and
0:03:50i'll go values just basically information to two years facing each other
0:03:56and when you shine light on the one last time for many times and a
0:04:02dash
0:04:03with this configuration we can wait for a single but in this brochure the on
0:04:10that selecting the interaction between the driver but constantly at the gap also serve to
0:04:15final the one that the atoms of this makes it much easier to master in
0:04:20a systematic way
0:04:21the driver's on israeli for instance interaction with the atom is characterized by the release
0:04:26of the segments are for the
0:04:29as long as the cavity we filter out the polarised right but on polarised and
0:04:34time step derive a limited but
0:04:38this process is iterated thousands of times second for different items and the interference can
0:04:43be as their statistical this during an appearance that indicates over time due to environmental
0:04:47and that is what we can't control
0:04:51so what we actually not doing with our experiment is we use one of our
0:04:56detectors to do some feedback on our experiments where we chernoff momentarily are directly so
0:05:04this has the effect of increased amplitude on the interference pattern you saw before
0:05:11a two factors to a which translates to are superposition living longer in the in
0:05:18protected against something covariance processes
0:05:21ultimately what we wanna do with our experiment is trying to preserve the superposition as
0:05:27long as possible
0:05:29many people especially in the information area are interested in using a function positions
0:05:39two
0:05:41that story information they wanna map some information store in light for example in to
0:05:48a
0:05:50into the electronic energy level of and then extract that back and forth hans and
0:05:57then built in this week one networks and other devices
0:06:03our goal for this experiment was simply to keep the superposition i alive this long
0:06:09as possible with a fast very simple feedback