The authors report the use of the dressed chopped random basis optimal control algorithm to realize time-reversal procedures. The latter are aimed for the implementation of quantum undo operations in quantum technology contexts as quantum computing and quantum communications. The last performed operation can be time-reversed via the undo command so as to perfectly restore a condition in which any new operation, chosen by the external user, can be applied. By generalizing this concept, the undo command can also allow for the reversing of a quantum operation in a generic time instant of the past. Here, thanks to optimal time-reversal routines, all these functionalities are experimentally implemented on the fivefold (Formula presented.) Hilbert space of a Bose–Einstein condensate of non-interacting 87Rb atoms in the ground state, realized with an atom chip. Each time-reversal transformation is attained by designing an optimal modulated radio frequency field, achieving on average an accuracy of around 92% in any performed test. The experimental results are accompanied by a thermodynamic interpretation based on the Loschmidt echo. These findings are expected to promote the implementation of time-reversal operations in a real scenario of gate-based quantum computing with a more complex structure than the five-level system considered here.

Experimental Realization of Optimal Time-Reversal on an Atom Chip for Quantum Undo Operations / Mastroserio I.; Gherardini S.; Lovecchio C.; Calarco T.; Montangero S.; Cataliotti F.S.; Caruso F.. - In: ADVANCED QUANTUM TECHNOLOGIES. - ISSN 2511-9044. - STAMPA. - 5:12(2022), pp. 2200057.1-2200057.11. [10.1002/qute.202200057]

Experimental Realization of Optimal Time-Reversal on an Atom Chip for Quantum Undo Operations

Calarco T.;
2022

Abstract

The authors report the use of the dressed chopped random basis optimal control algorithm to realize time-reversal procedures. The latter are aimed for the implementation of quantum undo operations in quantum technology contexts as quantum computing and quantum communications. The last performed operation can be time-reversed via the undo command so as to perfectly restore a condition in which any new operation, chosen by the external user, can be applied. By generalizing this concept, the undo command can also allow for the reversing of a quantum operation in a generic time instant of the past. Here, thanks to optimal time-reversal routines, all these functionalities are experimentally implemented on the fivefold (Formula presented.) Hilbert space of a Bose–Einstein condensate of non-interacting 87Rb atoms in the ground state, realized with an atom chip. Each time-reversal transformation is attained by designing an optimal modulated radio frequency field, achieving on average an accuracy of around 92% in any performed test. The experimental results are accompanied by a thermodynamic interpretation based on the Loschmidt echo. These findings are expected to promote the implementation of time-reversal operations in a real scenario of gate-based quantum computing with a more complex structure than the five-level system considered here.
2022
Experimental Realization of Optimal Time-Reversal on an Atom Chip for Quantum Undo Operations / Mastroserio I.; Gherardini S.; Lovecchio C.; Calarco T.; Montangero S.; Cataliotti F.S.; Caruso F.. - In: ADVANCED QUANTUM TECHNOLOGIES. - ISSN 2511-9044. - STAMPA. - 5:12(2022), pp. 2200057.1-2200057.11. [10.1002/qute.202200057]
Mastroserio I.; Gherardini S.; Lovecchio C.; Calarco T.; Montangero S.; Cataliotti F.S.; Caruso F.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/964878
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