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Quantum superposition and
quantum entanglement are the bedrock on which new theoretical
paradigms for information transmission, storage, and
processing are being built. The preeminent obstacle
to the development of quantum information technology
is the difficulty of transmitting quantum information
over noisy and lossy quantum communication channels,
recovering and refreshing the quantum information that
is received, and then storing it in a reliable quantum
memory.
With support from the Multidisciplinary Research Program
of the University Research Initiative (MURI), we have
assembled a truly interdisciplinary team from researchers
at MIT and Northwestern University to overcome this
obstacle. The focus of our program is an architecture
we have established for long-distance, high-fidelity
qubit teleportation. Its key elements are:
ultrabright, narrowband sources of polarization-entangled
photon pairs;
long-distance transmission of entangled photons over
standard telecom fiber;
qubit storage and processing in trapped atom quantum
memories.
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