Excitation spectrum as a resource for efficient two-qubit entangling gates
arXiv:1312.6866 · doi:10.1103/PhysRevB.89.155404
Abstract
Physical systems representing qubits typically have one or more accessible quantum states in addition to the two states that encode the qubit. We demonstrate that active involvement of such auxiliary states can be beneficial in constructing entangling two-qubit operations. We investigate the general case of two multi-state quantum systems coupled via a quantum resonator. The approach is illustrated with the examples of three systems: self-assembled InAs/GaAs quantum dots, NV-centers in diamond, and superconducting transmon qubits. Fidelities of the gate operations are calculated based on numerical simulations of each system.
19 pages
References in corpus (17)
- Quantum Computing
- Charge insensitive qubit design derived from the Cooper pair box
- The nitrogen-vacancy colour centre in diamond
- Black-box superconducting circuit quantization
- Fidelity of quantum operations
- Ultrafast optical control of entanglement between two quantum dot spins
- Optical properties of the nitrogen-vacancy singlet levels in diamond
- Resonant addressing and manipulation of silicon vacancy qubits in silicon carbide
- Quantum control of a spin qubit coupled to a photonic crystal cavity
- All-optical control of a solid-state spin using coherent dark states
- Theory of fast optical spin rotation in a quantum dot based on geometric phases and trapped states
- Interqubit coupling mediated by a high-excitation-energy quantum object
- Non-Unitary Quantum Walks on Hyper-Cycles
- Quantum information processing using frequency control of impurity spins in diamond
- Fast Two-Qubit Gates in Semiconductor Quantum Dots using a Photonic Microcavity
- Universal set of scalable dynamically corrected gates for quantum error correction with always-on qubit couplings
- Two-qubit quantum gates for defect qubits in diamond and similar systems