Abstract
We discuss the use of cold atoms in dipole traps to demonstrate experimentally a particular class of protocols for computation and metrology based on mixed states. Modelling of the system shows that, for a specific class of problems (tracing, phase estimation), a quantum advantage can be achieved over classical algorithms for very realistic conditions and strong decoherence. We discuss the results of the models and the experimental implementation.
Highlights
Entanglement is widely recognised as a key resource in quantum technology, an advantage over classical computing can be achieved without it in the presence of non-classical correlations, quantifiable as discord [1]
We recently proposed a scheme, where cold atoms in dipole traps can be prepared in a probe state that can reach sensitivities beyond the standard quantum limit (SQL), even for moderate initial purity of the control and register states [4]
We reported on progress on the design and implementation of a cold-atoms based experiment to test the quantum advantage to be gained in the presence of mixed states
Summary
How to cite: Krzyzanowska, K; Copley-May, M; Romain, R; MacCormick, C and Bergamini, S (2017). Quantum-enhanced protocols with mixed states using cold atoms in dipole traps. Journal of Physics: Conference Series, 793(1), article no. For guidance on citations see FAQs. c 2017 IOP Publishing https://creativecommons.org/licenses/by/4.0/ Version: Version of Record Link(s) to article on publisher’s website: http://dx.doi.org/doi:10.1088/1742-6596/793/1/012015. Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online’s data policy on reuse of materials please consult the policies page
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