| C.A. Fuchs. Nonorthogonal quantum states maximize classical information capacity. Phys. Rev. Lett., 79:1162, 1997. |
....168 density matrix; hence goes to zero. Lloyd omits the maximization over encodings in his work on channel capacity. I agree that this will likely be unnecessary for the extreme quantum case he was considering. It may well also be unnecessary for the classical and intermediate cases. Fuchs [64] has shown that nonorthogonal input ensembles for a channel may increase Holevo s : This implies that nonunitary encodings E will be necessary to achieve the maximum for finite n: However, I lean toward the view that in the large block limit this effect goes away, and schemes restricted to ....
C. Fuchs, "Nonorthogonal quantum states maximize classical information capacity, " Physical Review Letters, vol. 79, pp. 1162--1165, 1997.
....unsorted databases, see, Grover [2] have been discovered which are faster than their classical counterparts. Quantum bits, in contrast to classical bits, cannot be copied perfectly, and this is useful in such tasks as quantum cryptography, see, Bennett, Brassard, and Ekert [3] Furthermore, Fuchs [4] has shown that, rather unexpectedly, there exist certain quantum communication channels for which the optimal classical information transmission rate is achieved only using non orthogonal quantum states as the symbols. Finally, quite surprisingly, quantum error correction codes have been ....
C. Fuchs, "Nonorthogonal quantum states maximize classical information capacity," Physical Review Letters, vol. 79, pp. 1162--1165, 1997.
....information theory. Quantum channel capacity has been investigated for noisy channels (DiVincenzo, et al. [DSS 95] Holevo [Hol96] Barnum et al. [BNS 97] Bennett et al. [BDS98,BBP 96] very noisy channels (Shor, Smolin [SS98] and quantum erasure channels (Bennett et al. [BDS97b] Fuchs [Fuc97] showed that nonorthogonal quantum states maximize classical information capacity. Also, Helstrom [H97,H98] defines a quantum theory of information detection, and Fuchs [Fuc96] defines a quantum theory of information distinguishability. 5.3 Quantum Compression Holevo [H97] also see Fuchs and ....
Fuchs, C., Nonorthogonal quantum states maximize classical information capacity. (Online preprint quantph /9703043.), (1997).
....information theory. Quantum channel capacity has been investigated for noisy channels (DiVincenzo, et al. [DSS 95] Holevo [Hol96] Barnum et al. [BNS 97] Bennett et al. [BDS98,BBP 96] very noisy channels (Shor, Smolin [SS98] and quantum erasure channels (Bennett et al. [BDS97b] Fuchs [Fuc97] showed that nonorthogonal quantum states maximize classical information capacity. Also, Helstrom [H97,H98] defines a quantum theory of information detection, and Fuchs [Fuc96] defines a quantum theory of information distinguishability. 4.2 Decoherence Errors in QC. Quantum decoherence is the ....
Fuchs, C., Nonorthogonal quantum states maximize classical information capacity. (Online preprint quant-ph/9703043.), (1997).
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C.A. Fuchs. Nonorthogonal quantum states maximize classical information capacity. Phys. Rev. Lett., 79:1162, 1997.
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