3 ms·
Isn't that the same as just using 4 voltages (or any other analog property) instead of 2 to encode 2 bits instead of 1? Qbits are analog so it's no surprise it
by ajuc 6y ago
Isn't that the same as just using 4 voltages (or any other analog property) instead of 2 to encode 2 bits instead of 1?
Qbits are analog so it's no surprise it can be done with them as well.
Flash memory already does that in classical chips. There's nothing preventing you from going further - 8 voltages for 3 bits etc.
- waterhouse 6y agoAnd classical bits are presumably much easier to transport intact, by several orders of magnitude in terms of cost. Seems the superdense coding would only help if sending qubits were less than 2x as expensive as sending classical bits.
- tsimionescu 6y agoThe problem with analog encodings is that it often doesn't scale at all - the energy required to measure your analog state precisely enough to send large numbers of bits becomes too impractical.