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On-chip quantum interference of a superconducting microsphere

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posted on 2023-06-09, 13:01 authored by H Pino, J Prat-Camps, K Sinha, B Prasanna Venkatesh, O Romero-Isart
We propose and analyze an all-magnetic scheme to perform a Young's double slit experiment with a micron-sized superconducting sphere of mass $\gtrsim {10}^{13}$ amu. We show that its center of mass could be prepared in a spatial quantum superposition state with an extent of the order of half a micrometer. The scheme is based on magnetically levitating the sphere above a superconducting chip and letting it skate through a static magnetic potential landscape where it interacts for short intervals with quantum circuits. In this way, a protocol for fast quantum interferometry using quantum magnetomechanics is passively implemented. Such a table-top earth-based quantum experiment would operate in a parameter regime where gravitational energy scales become relevant. In particular, we show that the faint parameter-free gravitationally-induced decoherence collapse model, proposed by Diósi and Penrose, could be unambiguously falsified.

History

Publication status

  • Published

File Version

  • Published version

Journal

Quantum Science and Technology

ISSN

2058-9565

Publisher

IOP Publishing

Issue

025001

Volume

3

Department affiliated with

  • Informatics Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-04-24

First Open Access (FOA) Date

2018-04-24

First Compliant Deposit (FCD) Date

2018-04-24

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