Rabl, P. (2022, October 23). A universal time-dependent control scheme for realizing arbitrary bosonic unitaries [Conference Presentation]. Quantum 2022, on-line, Spain.
E141-08 - Forschungsbereich Quantum Optics and Quantum Information
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Date (published):
23-Oct-2022
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Event name:
Quantum 2022
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Event date:
23-Oct-2022
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Event place:
on-line, Spain
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Keywords:
multi-mode state transfer operations
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Abstract:
In this talk, I will discuss a new scheme for multi-mode state transfer operations and the implementation of arbitrary unitary transformations between a large number of bosonic modes. In contrast to conventional approaches for implementing bosonic unitaries by sending photons through a fixed network of beams splitters and phase shifter, I will show how the same task can be achieved through a controlled emission and reabsorption of a multi-photon wavepacket. This provides a very flexible way of implementing bosonic unitary operations, where the properties of the transformation are fully determined by the shape of the control pulses and not by any hardware settings. I will outline a proof for the existence of such a set of control pulses for arbitrary unitaries and discuss several concrete examples, which show that the total protocol time only scales linearly with the involved number of modes. Based on this optimal scaling and its universality, this new scheme can find many applications, for example, for boson-sampling experiments, multi-qubit state transfer protocols or in continuous-variable quantum computing architectures.
