Collective quantum phase slips in multiple nanowire junctions
(2019) In Physical Review A 99(1).- Abstract
Realization of robust coherent quantum phase slips represents a significant experimental challenge. Here we propose a design consisting of multiple nanowire junctions to realize a phase-slip flux qubit. It admits good tunability provided by gate voltages applied on superconducting islands separating nanowire junctions. In addition, the gates and junctions can be identical to or distinct from each other, leading to symmetric and asymmetric setups. We find that the asymmetry can improve the performance of the proposed device compared with the symmetric case. In particular, it can enhance the effective rate of collective quantum phase slips. Furthermore, we demonstrate how to couple two such devices via a mutual inductance. This is... (More)
Realization of robust coherent quantum phase slips represents a significant experimental challenge. Here we propose a design consisting of multiple nanowire junctions to realize a phase-slip flux qubit. It admits good tunability provided by gate voltages applied on superconducting islands separating nanowire junctions. In addition, the gates and junctions can be identical to or distinct from each other, leading to symmetric and asymmetric setups. We find that the asymmetry can improve the performance of the proposed device compared with the symmetric case. In particular, it can enhance the effective rate of collective quantum phase slips. Furthermore, we demonstrate how to couple two such devices via a mutual inductance. This is potentially useful for quantum gate operations. Our investigation on how symmetry in multiple nanowire junctions affects the device performance should be useful for the application of phase-slip flux qubits in quantum information processing and quantum metrology.
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- author
- Li, Zeng Zhao LU ; Li, Tie Fu ; Lam, Chi Hang and You, J. Q.
- organization
- publishing date
- 2019-01-08
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review A
- volume
- 99
- issue
- 1
- article number
- 012309
- publisher
- American Physical Society
- external identifiers
-
- scopus:85059814229
- ISSN
- 2469-9926
- DOI
- 10.1103/PhysRevA.99.012309
- language
- English
- LU publication?
- yes
- id
- 93125b64-4736-4430-8e9a-7a8c7826e8d4
- date added to LUP
- 2019-01-23 13:19:12
- date last changed
- 2022-04-25 20:44:06
@article{93125b64-4736-4430-8e9a-7a8c7826e8d4,
abstract = {{<p>Realization of robust coherent quantum phase slips represents a significant experimental challenge. Here we propose a design consisting of multiple nanowire junctions to realize a phase-slip flux qubit. It admits good tunability provided by gate voltages applied on superconducting islands separating nanowire junctions. In addition, the gates and junctions can be identical to or distinct from each other, leading to symmetric and asymmetric setups. We find that the asymmetry can improve the performance of the proposed device compared with the symmetric case. In particular, it can enhance the effective rate of collective quantum phase slips. Furthermore, we demonstrate how to couple two such devices via a mutual inductance. This is potentially useful for quantum gate operations. Our investigation on how symmetry in multiple nanowire junctions affects the device performance should be useful for the application of phase-slip flux qubits in quantum information processing and quantum metrology.</p>}},
author = {{Li, Zeng Zhao and Li, Tie Fu and Lam, Chi Hang and You, J. Q.}},
issn = {{2469-9926}},
language = {{eng}},
month = {{01}},
number = {{1}},
publisher = {{American Physical Society}},
series = {{Physical Review A}},
title = {{Collective quantum phase slips in multiple nanowire junctions}},
url = {{http://dx.doi.org/10.1103/PhysRevA.99.012309}},
doi = {{10.1103/PhysRevA.99.012309}},
volume = {{99}},
year = {{2019}},
}