A quantum logic gate for free electrons
The topological charge $m$ of vortex electrons spans an infinite-dimensional Hilbert space. Selecting a two-dimensional subspace spanned by $m=\pm 1$, a beam electron in a transmission electron microscope (TEM) can be considered as a quantum bit (qubit) freely propagating in the column. A combinatio...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2023-07-01
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| Series: | Quantum |
| Online Access: | https://quantum-journal.org/papers/q-2023-07-11-1050/pdf/ |
| _version_ | 1797783276088197120 |
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| author | Stefan Löffler Thomas Schachinger Peter Hartel Peng-Han Lu Rafal E. Dunin-Borkowski Martin Obermair Manuel Dries Dagmar Gerthsen Peter Schattschneider |
| author_facet | Stefan Löffler Thomas Schachinger Peter Hartel Peng-Han Lu Rafal E. Dunin-Borkowski Martin Obermair Manuel Dries Dagmar Gerthsen Peter Schattschneider |
| author_sort | Stefan Löffler |
| collection | DOAJ |
| description | The topological charge $m$ of vortex electrons spans an infinite-dimensional Hilbert space. Selecting a two-dimensional subspace spanned by $m=\pm 1$, a beam electron in a transmission electron microscope (TEM) can be considered as a quantum bit (qubit) freely propagating in the column. A combination of electron optical quadrupole lenses can serve as a universal device to manipulate such qubits at the experimenter's discretion. We set up a TEM probe forming lens system as a quantum gate and demonstrate its action numerically and experimentally. High-end TEMs with aberration correctors are a promising platform for such experiments, opening the way to study quantum logic gates in the electron microscope. |
| first_indexed | 2024-03-13T00:23:45Z |
| format | Article |
| id | doaj.art-fb0ea0cafe6a48268c6ffe91ecb2dcbd |
| institution | Directory Open Access Journal |
| issn | 2521-327X |
| language | English |
| last_indexed | 2024-03-13T00:23:45Z |
| publishDate | 2023-07-01 |
| publisher | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften |
| record_format | Article |
| series | Quantum |
| spelling | doaj.art-fb0ea0cafe6a48268c6ffe91ecb2dcbd2023-07-11T09:04:07ZengVerein zur Förderung des Open Access Publizierens in den QuantenwissenschaftenQuantum2521-327X2023-07-017105010.22331/q-2023-07-11-105010.22331/q-2023-07-11-1050A quantum logic gate for free electronsStefan LöfflerThomas SchachingerPeter HartelPeng-Han LuRafal E. Dunin-BorkowskiMartin ObermairManuel DriesDagmar GerthsenPeter SchattschneiderThe topological charge $m$ of vortex electrons spans an infinite-dimensional Hilbert space. Selecting a two-dimensional subspace spanned by $m=\pm 1$, a beam electron in a transmission electron microscope (TEM) can be considered as a quantum bit (qubit) freely propagating in the column. A combination of electron optical quadrupole lenses can serve as a universal device to manipulate such qubits at the experimenter's discretion. We set up a TEM probe forming lens system as a quantum gate and demonstrate its action numerically and experimentally. High-end TEMs with aberration correctors are a promising platform for such experiments, opening the way to study quantum logic gates in the electron microscope.https://quantum-journal.org/papers/q-2023-07-11-1050/pdf/ |
| spellingShingle | Stefan Löffler Thomas Schachinger Peter Hartel Peng-Han Lu Rafal E. Dunin-Borkowski Martin Obermair Manuel Dries Dagmar Gerthsen Peter Schattschneider A quantum logic gate for free electrons Quantum |
| title | A quantum logic gate for free electrons |
| title_full | A quantum logic gate for free electrons |
| title_fullStr | A quantum logic gate for free electrons |
| title_full_unstemmed | A quantum logic gate for free electrons |
| title_short | A quantum logic gate for free electrons |
| title_sort | quantum logic gate for free electrons |
| url | https://quantum-journal.org/papers/q-2023-07-11-1050/pdf/ |
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