Observation of interaction induced blockade and local spin freezing in a NMR quantum simulator
We experimentally emulate interaction induced blockade and local spin freezing in two and three qubit NMR architecture. These phenomena are identical to the Rydberg blockade and Rydberg biased freezing. In Rydberg blockade, the simultaneous excitation of two or more atoms is blocked due to the level...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2021-07-01
|
| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.3.033035 |
| _version_ | 1827285708220399616 |
|---|---|
| author | V. R. Krithika Soham Pal Rejish Nath T. S. Mahesh |
| author_facet | V. R. Krithika Soham Pal Rejish Nath T. S. Mahesh |
| author_sort | V. R. Krithika |
| collection | DOAJ |
| description | We experimentally emulate interaction induced blockade and local spin freezing in two and three qubit NMR architecture. These phenomena are identical to the Rydberg blockade and Rydberg biased freezing. In Rydberg blockade, the simultaneous excitation of two or more atoms is blocked due to the level shift induced by the strong van der Waal's interaction. In such a strong interaction regime, one can also observe Rydberg biased freezing, wherein the dynamics is confined to a subspace, with the help of multiple drives with unequal amplitudes. Here we drive NMR qubits with specific transition-selective radio waves, while intermittently characterizing the quantum states via quantum state tomography. This not only allows us to track the population dynamics, but also helps to probe quantum correlations, by means of quantum discord, evolving under blockade and freezing phenomena. Our work constitutes experimental simulations of these phenomena in the NMR platform. Moreover, these studies open up interesting quantum control perspectives in exploiting the above phenomena for entanglement generation as well as subspace manipulations. |
| first_indexed | 2024-04-24T10:19:16Z |
| format | Article |
| id | doaj.art-3d10e90612404be9bca5196b32886543 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:19:16Z |
| publishDate | 2021-07-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-3d10e90612404be9bca5196b328865432024-04-12T17:11:39ZengAmerican Physical SocietyPhysical Review Research2643-15642021-07-013303303510.1103/PhysRevResearch.3.033035Observation of interaction induced blockade and local spin freezing in a NMR quantum simulatorV. R. KrithikaSoham PalRejish NathT. S. MaheshWe experimentally emulate interaction induced blockade and local spin freezing in two and three qubit NMR architecture. These phenomena are identical to the Rydberg blockade and Rydberg biased freezing. In Rydberg blockade, the simultaneous excitation of two or more atoms is blocked due to the level shift induced by the strong van der Waal's interaction. In such a strong interaction regime, one can also observe Rydberg biased freezing, wherein the dynamics is confined to a subspace, with the help of multiple drives with unequal amplitudes. Here we drive NMR qubits with specific transition-selective radio waves, while intermittently characterizing the quantum states via quantum state tomography. This not only allows us to track the population dynamics, but also helps to probe quantum correlations, by means of quantum discord, evolving under blockade and freezing phenomena. Our work constitutes experimental simulations of these phenomena in the NMR platform. Moreover, these studies open up interesting quantum control perspectives in exploiting the above phenomena for entanglement generation as well as subspace manipulations.http://doi.org/10.1103/PhysRevResearch.3.033035 |
| spellingShingle | V. R. Krithika Soham Pal Rejish Nath T. S. Mahesh Observation of interaction induced blockade and local spin freezing in a NMR quantum simulator Physical Review Research |
| title | Observation of interaction induced blockade and local spin freezing in a NMR quantum simulator |
| title_full | Observation of interaction induced blockade and local spin freezing in a NMR quantum simulator |
| title_fullStr | Observation of interaction induced blockade and local spin freezing in a NMR quantum simulator |
| title_full_unstemmed | Observation of interaction induced blockade and local spin freezing in a NMR quantum simulator |
| title_short | Observation of interaction induced blockade and local spin freezing in a NMR quantum simulator |
| title_sort | observation of interaction induced blockade and local spin freezing in a nmr quantum simulator |
| url | http://doi.org/10.1103/PhysRevResearch.3.033035 |
| work_keys_str_mv | AT vrkrithika observationofinteractioninducedblockadeandlocalspinfreezinginanmrquantumsimulator AT sohampal observationofinteractioninducedblockadeandlocalspinfreezinginanmrquantumsimulator AT rejishnath observationofinteractioninducedblockadeandlocalspinfreezinginanmrquantumsimulator AT tsmahesh observationofinteractioninducedblockadeandlocalspinfreezinginanmrquantumsimulator |