Optical multiqubit gate operations on an excitation-blockaded atomic quantum register
(2023) In Physical Review Research 5(1).- Abstract
We consider a multiqubit system of atoms or ions with two computational ground states and an interacting excited state in the so-called blockade regime, such that only one qubit can be excited at any one time. Examples of such systems are rare-earth-ion-doped crystals and neutral atoms trapped in tweezer arrays. We present a simple laser excitation protocol that yields a complex phase factor on any desired multiqubit product state, and which can be used to implement multiqubit gates such as the n-bit Toffoli gates. The operation is performed using only two pulses, where each pulse simultaneously address all qubits involved in the operation. By relying on the well-established complex hyperbolic secant pulse shape, our scheme is also... (More)
We consider a multiqubit system of atoms or ions with two computational ground states and an interacting excited state in the so-called blockade regime, such that only one qubit can be excited at any one time. Examples of such systems are rare-earth-ion-doped crystals and neutral atoms trapped in tweezer arrays. We present a simple laser excitation protocol that yields a complex phase factor on any desired multiqubit product state, and which can be used to implement multiqubit gates such as the n-bit Toffoli gates. The operation is performed using only two pulses, where each pulse simultaneously address all qubits involved in the operation. By relying on the well-established complex hyperbolic secant pulse shape, our scheme is also robust and permits complete transfers to and from the excited states despite variations in Rabi frequencies and transition frequencies. A detailed analysis of the multiqubit gate performance is provided.
(Less)
- author
- Kinos, Adam LU and Mølmer, Klaus
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Research
- volume
- 5
- issue
- 1
- article number
- 013205
- publisher
- American Physical Society
- external identifiers
-
- scopus:85151389546
- ISSN
- 2643-1564
- DOI
- 10.1103/PhysRevResearch.5.013205
- language
- English
- LU publication?
- yes
- id
- 2dd249b3-9a43-493a-a075-698a75f01958
- date added to LUP
- 2023-05-23 15:49:12
- date last changed
- 2023-11-08 06:17:03
@article{2dd249b3-9a43-493a-a075-698a75f01958,
abstract = {{<p>We consider a multiqubit system of atoms or ions with two computational ground states and an interacting excited state in the so-called blockade regime, such that only one qubit can be excited at any one time. Examples of such systems are rare-earth-ion-doped crystals and neutral atoms trapped in tweezer arrays. We present a simple laser excitation protocol that yields a complex phase factor on any desired multiqubit product state, and which can be used to implement multiqubit gates such as the n-bit Toffoli gates. The operation is performed using only two pulses, where each pulse simultaneously address all qubits involved in the operation. By relying on the well-established complex hyperbolic secant pulse shape, our scheme is also robust and permits complete transfers to and from the excited states despite variations in Rabi frequencies and transition frequencies. A detailed analysis of the multiqubit gate performance is provided.</p>}},
author = {{Kinos, Adam and Mølmer, Klaus}},
issn = {{2643-1564}},
language = {{eng}},
number = {{1}},
publisher = {{American Physical Society}},
series = {{Physical Review Research}},
title = {{Optical multiqubit gate operations on an excitation-blockaded atomic quantum register}},
url = {{http://dx.doi.org/10.1103/PhysRevResearch.5.013205}},
doi = {{10.1103/PhysRevResearch.5.013205}},
volume = {{5}},
year = {{2023}},
}