Quantum-enhanced protocols with mixed states using cold atoms in dipole traps

7th International Symposium and Young Scientists School "Modern Problems of Laser Physics"

Krzyzanowska, K.^1 ; Copley-May, M.^1 ; Romain, R.^1 ; MacCormick, C.^1 ; Bergamini, S.^1

Department of Physical Science, Open University, Milton Keynes, United Kingdom^1

关键词: Cold atoms;    Decoherence;    Dipole traps;    Mixed state;    Phase estimation;    Realistic conditions;    Specific class;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/793/1/012015/pdf
DOI  :  10.1088/1742-6596/793/1/012015

来源: IOP

【 摘 要 】

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.