Quantum computation using weak nonlinearities: robustness against decoherence
arXiv:quant-ph/0512117 · doi:10.1103/PhysRevA.73.052320
Abstract
We investigate decoherence effects in the recently suggested quantum computation scheme using weak nonlinearities, strong probe coherent fields, detection and feedforward methods. It is shown that in the weak-nonlinearity-based quantum gates, decoherence in nonlinear media it can be made arbitrarily small simply by using arbitrarily strong probe fields, if photon number resolving detection is used. On the contrary, we find that homodyne detection with feedforward is not appropriate for this scheme because in this case decoherence rapidly increases as the probe field gets larger.
6 pages, 4 figures, 1 table, to be published in Phys. Rev. A
References in corpus (8)
- A near deterministic linear optical CNOT gate
- Weak nonlinearities: A new route to optical quantum computation
- A symmetry analyser for non-destructive Bell state detection using EIT
- Quantum Computation by Communication
- Using weak nonlinearity under decoherence for macroscopic-entanglement generation and quantum computation
- Generation of macroscopic superposition states with small nonlinearity
- Efficient optical quantum information processing
- Universal quantum computation on the power of quantum non-demolition measurements
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