Abstract
Optimization of the fidelity of control operations is of critical importance in the pursuit of fault-tolerant quantum computation. We apply optimal control techniques to demonstrate that a single drive via the cavity in circuit quantum electrodynamics can implement a high-fidelity two-qubit all-microwave gate that directly entangles the qubits via the mutual qubit-cavity couplings. This is performed by driving at one of the qubits' frequencies which generates a conditional two-qubit gate, but will also generate other spurious interactions. These optimal control techniques are used to find pulse shapes that can perform this two-qubit gate with high fidelity, robust against errors in the system parameters. The simulations were all performed using experimentally relevant parameters and constraints.
Original language | English |
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Article number | 042325 |
Number of pages | 11 |
Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
Volume | 95 |
Issue number | 4 |
DOIs | |
Publication status | Published - 18 Apr 2017 |
Keywords
- RCUK
- EPSRC
- EP/L026082/1
- EP/L02263X/1