Name
Abstract | ||
|---|---|---|
Simultaneous near-certain preparation of qubits (quantum bits) in their ground states is a key hurdle in quantum computing proposals as varied as liquid-state NMR and ion traps. “Closed-system” cooling mechanisms are of limited applicability due to the need for a continual supply of ancillas for fault tolerance and to the high initial temperatures of some systems. “Open-system” mechanisms are therefore required. We describe a new, efficient initialization procedure for such open systems. With this procedure, an $n$-qubit device that is originally maximally mixed, but is in contact with a heat bath of bias $\varepsilon \gg 2^{-n}$, can be almost perfectly initialized. This performance is optimal due to a newly discovered threshold effect: For bias $\varepsilon \ll 2^{-n}$ no cooling procedure can, even in principle (running indefinitely without any decoherence), significantly initialize even a single qubit. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1137/050666023 | Physical Review Letters |
Keywords | Field | DocType |
qubit device,heat-bath algorithmic cooling,quantum bit,state preparation,quantum computing proposal,heat bath,ground state,quantum computation,cooling procedure,single qubit,continual supply,physical limits,efficient initialization procedure,fault tolerance,thermodynamics,nuclear magnetic resonance,quantum computer,quantum statistics,open system,fault tolerant,ion trap | Quantum,Quantum mechanics,Quantum computer,Fault tolerance,Quantum decoherence,Initialization,Open system (systems theory),Qubit,Ion,Condensed matter physics,Physics | Journal |
Volume | Issue | ISSN |
36 | 6 | 0031-9007 |
Citations | PageRank | References |
6 | 3.26 | 4 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Leonard J. Schulman | 1 | 1328 | 136.88 |
| Tal Mor | 2 | 208 | 49.00 |
| Yossi Weinstein | 3 | 6 | 3.59 |