Many-body strategies for multiqubit gates: Quantum control through Krawtchouk-chain dynamics
| Autor: | Koen Groenland, Kareljan Schoutens |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Quantum Physics Single pair Quantum control FOS: Physical sciences Topology 01 natural sciences Many body 010305 fluids & plasmas Linear array symbols.namesake Quantum gate Qubit Quantum mechanics 0103 physical sciences symbols 010306 general physics Hamiltonian (quantum mechanics) Quantum Physics (quant-ph) Eigenvalues and eigenvectors |
| Zdroj: | Physical Review A: Atomic, Molecular and Optical Physics, 97(4) |
| ISSN: | 1050-2947 |
| Popis: | We propose a strategy for engineering multi-qubit quantum gates. As a first step, it employs an eigengate to map states in the computational basis to eigenstates of a suitable many-body Hamiltonian. The second step employs resonant driving to enforce a transition between a single pair of eigenstates, leaving all others unchanged. The procedure is completed by mapping back to the computational basis. We demonstrate the strategy for the case of a linear array with an even number N of qubits, with specific XX+YY couplings between nearest neighbors. For this so-called Krawtchouk chain, a 2-body driving term leads to the iSWAP$_N$ gate, which we numerically test for N = 4 and 6. 10 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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