Practical Implementations of Twirl Operations
arXiv:quant-ph/0409142 · doi:10.1103/PhysRevA.71.032327
Abstract
Twirl operations, which convert impure singlet states into Werner states, play an important role in many schemes for entanglement purification. In this paper we describe strategies for implementing twirl operations, with an emphasis on methods suitable for ensemble quantum information processors such as nuclear magnetic resonance (NMR) quantum computers. We implement our twirl operation on a general two-spin mixed state using liquid state NMR techniques, demonstrating that we can obtain the singlet Werner state with high fidelity.
6 pages RevTex4 including 2 figures (fig 1 low quality to save space)
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Cited by in corpus (12)
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- Non separable Werner states in spontaneous parametric down-conversion
- Single-Shot Quantum Process Tomography
- Steering Quantum Dynamics via Bang-Bang Control: Implementing optimal fixed point quantum search algorithm
- Controlling NMR spin systems for quantum computation
- Single-Step Parity Check Gate Set for Quantum Error Correction
- Sharing Polarization within Quantum Subspaces
- Nuclear Spins as Quantum Testbeds: Singlet States, Quantum Correlations, and Delayed-choice Experiments
- State-dependent Routing Dynamics in Noisy Quantum Computing Devices
- Ancilla Assisted Quantum Information Processing: General protocols and NMR implementations