Demonstration of universal time-reversal for quantum processes

Schiansky, Peter; Strömberg, Teodor; Trillo, David; Saggio, Valeria; Dive, Ben; Navascués, Miguel; Walther, Philip

doi:10.48550/arxiv.2205.01122

Cited by 2 publications

(2 citation statements)

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“…So far, procedures carrying out time-reversal transformations [3] have been implemented in superconducting circuits realizing quantum circuits, [4] and classical [5] and quantum optics platform. [6] As a main feature, it is desirable to employ universal features that are valid in a general quantum technologies context. In this regard, two main challenges have to be still addressed: one from the procedural/numerical side, ensuring high performance and high speed, and the other from a technological/experimental point of view.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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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 F=2$F=2$ 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.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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“…In quantum platforms for quantum computing, the undo command is expected to need more onerous procedures with respect to the classical case. So far, procedures carrying out time-reversal transformations [3] have been implemented in superconducting circuits realizing quantum circuits [4], and classical [5] and quantum optics platform [6]. As a main feature, it is desirable to employ universal features that are valid in a general quantum technologies context.…”

Section: Introductionmentioning

confidence: 99%

Experimental realization of optimal time-reversal on an atom chip for quantum undo operations

Mastroserio,

Gherardini,

Lovecchio

et al. 2022

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Demonstration of universal time-reversal for quantum processes

Cited by 2 publications

References 11 publications

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

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

Experimental realization of optimal time-reversal on an atom chip for quantum undo operations

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