6,761 research outputs found
Multi-strange particle production in relativistic heavy ion collisions at GeV
We present preliminary STAR results on measurements of multi-strange
particles , and their anti-particles from Au+Au and Cu+Cu at
GeV collisions. In order to better understand the role of
strangeness enhancement in nucleus-nucleus collisions and its scaling
properties with system size, we compare the results from Au+Au and Cu+Cu
reactions for different event centrality classes. Strangeness enhancement is
discussed in the context of multi-strange to pion ratios. Finally,
ratio is shown for different systems and energies for a
systematic study
Transmission Of Optical Coherent State Qubits
We discuss the long distance transmission of qubits encoded in optical
coherent states. Through absorption these qubits suffer from two main types of
errors, the reduction of the amplitude of the coherent states and accidental
application of the Pauli Z operator. We show how these errors can be fixed
using techniques of teleportation and error correcting codes.Comment: Added two pages of explanation/background/review material to increase
readability and clarity. Corrected minor typographical and linguistic error
Entanglement Purification of Any Stabilizer State
We present a method for multipartite entanglement purification of any
stabilizer state shared by several parties. In our protocol each party measures
the stabilizer operators of a quantum error-correcting code on his or her
qubits. The parties exchange their measurement results, detect or correct
errors, and decode the desired purified state. We give sufficient conditions on
the stabilizer codes that may be used in this procedure and find that Steane's
seven-qubit code is the smallest error-correcting code sufficient to purify any
stabilizer state. An error-detecting code that encodes two qubits in six can
also be used to purify any stabilizer state. We further specify which classes
of stabilizer codes can purify which classes of stabilizer states.Comment: 11 pages, 0 figures, comments welcome, submitting to Physical Review
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