|
| related topics |
| {states, state, optimal} |
| {qubit, qubits, gate} |
| {state, states, entangled} |
| {state, phys, rev} |
| {information, entropy, channel} |
| {cos, sin, state} |
| {bell, inequality, local} |
| {state, states, coherent} |
| {entanglement, phys, rev} |
|
Universal optimal cloning of qubits and quantum registers
Vladimir Buzek, Mark Hillery
abstract: We review our recent work on the universal (i.e. input state independent)
optimal quantum copying (cloning) of qubits. We present unitary transformations
which describe the optimal cloning of a qubit and we present the corresponding
quantum logical network. We also present network for an optimal quantum copying
``machine'' (transformation) which produces N+1 identical copies from the
original qubit. Here again the quality (fidelity) of the copies does not depend
on the state of the original and is only a function of the number of copies, N.
In addition, we present the machine which universaly and optimally clones
states of quantum objects in arbitrary-dimensional Hilbert spaces. In
particular, we discuss universal cloning of quantum registers.
- oai_identifier:
- oai:arXiv.org:quant-ph/9801009
- categories:
- quant-ph
- comments:
- To be presented at the First NASA Conference on Quantum Computing and
Quantum Communications, 17-20 February 1998, Palm Springs, USA
- arxiv_id:
- quant-ph/9801009
- created:
- 1998-01-07
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