The errors that arise in a quantum channel can be corrected perfectly if and only if the channel does not decrease the coherent information of the input state. We show that, if the loss of coherent information is small, then approximate quantum error correction is possible.
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CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
Free Univ Berlin, Dahlem Ctr Complex Quantum Syst, D-14195 Berlin, GermanyCALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
Faist, Philippe
Nezami, Sepehr
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Stanford Univ, Stanford Inst Theoret Phys, Stanford, CA 94305 USACALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
Nezami, Sepehr
Albert, Victor V.
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CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
CALTECH, Walter Burke Inst Theoret Phys, Pasadena, CA 91125 USACALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
Albert, Victor V.
Salton, Grant
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CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
Stanford Univ, Stanford Inst Theoret Phys, Stanford, CA 94305 USACALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
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Stanford Univ, Stanford Inst Theoret Phys, Stanford, CA 94305 USACALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
Hayden, Patrick
Preskill, John
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CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA
CALTECH, Walter Burke Inst Theoret Phys, Pasadena, CA 91125 USACALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA