Parallel entangling gate operations and two-way quantum communication in spin chains
The power of a quantum circuit is determined through the number of two-qubit entangling gates that can be performed within the coherence time of the system. In the absence of parallel quantum gate operations, this would make the quantum simulators limited to shallow circuits. Here, we propose a prot...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften
2021-05-01
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| Series: | Quantum |
| Online Access: | https://quantum-journal.org/papers/q-2021-05-26-460/pdf/ |
| _version_ | 1818728673505705984 |
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| author | Rozhin Yousefjani Abolfazl Bayat |
| author_facet | Rozhin Yousefjani Abolfazl Bayat |
| author_sort | Rozhin Yousefjani |
| collection | DOAJ |
| description | The power of a quantum circuit is determined through the number of two-qubit entangling gates that can be performed within the coherence time of the system. In the absence of parallel quantum gate operations, this would make the quantum simulators limited to shallow circuits. Here, we propose a protocol to parallelize the implementation of two-qubit entangling gates between multiple users which are spatially separated, and use a commonly shared spin chain data-bus. Our protocol works through inducing effective interaction between each pair of qubits without disturbing the others, therefore, it increases the rate of gate operations without creating crosstalk. This is achieved by tuning the Hamiltonian parameters appropriately, described in the form of two different strategies. The tuning of the parameters makes different bilocalized eigenstates responsible for the realization of the entangling gates between different pairs of distant qubits. Remarkably, the performance of our protocol is robust against increasing the length of the data-bus and the number of users. Moreover, we show that this protocol can tolerate various types of disorders and is applicable in the context of superconductor-based systems. The proposed protocol can serve for realizing two-way quantum communication. |
| first_indexed | 2024-12-17T22:33:44Z |
| format | Article |
| id | doaj.art-5843347d9d684719aa1134df4a3bb69e |
| institution | Directory Open Access Journal |
| issn | 2521-327X |
| language | English |
| last_indexed | 2024-12-17T22:33:44Z |
| publishDate | 2021-05-01 |
| publisher | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften |
| record_format | Article |
| series | Quantum |
| spelling | doaj.art-5843347d9d684719aa1134df4a3bb69e2022-12-21T21:30:08ZengVerein zur Förderung des Open Access Publizierens in den QuantenwissenschaftenQuantum2521-327X2021-05-01546010.22331/q-2021-05-26-46010.22331/q-2021-05-26-460Parallel entangling gate operations and two-way quantum communication in spin chainsRozhin YousefjaniAbolfazl BayatThe power of a quantum circuit is determined through the number of two-qubit entangling gates that can be performed within the coherence time of the system. In the absence of parallel quantum gate operations, this would make the quantum simulators limited to shallow circuits. Here, we propose a protocol to parallelize the implementation of two-qubit entangling gates between multiple users which are spatially separated, and use a commonly shared spin chain data-bus. Our protocol works through inducing effective interaction between each pair of qubits without disturbing the others, therefore, it increases the rate of gate operations without creating crosstalk. This is achieved by tuning the Hamiltonian parameters appropriately, described in the form of two different strategies. The tuning of the parameters makes different bilocalized eigenstates responsible for the realization of the entangling gates between different pairs of distant qubits. Remarkably, the performance of our protocol is robust against increasing the length of the data-bus and the number of users. Moreover, we show that this protocol can tolerate various types of disorders and is applicable in the context of superconductor-based systems. The proposed protocol can serve for realizing two-way quantum communication.https://quantum-journal.org/papers/q-2021-05-26-460/pdf/ |
| spellingShingle | Rozhin Yousefjani Abolfazl Bayat Parallel entangling gate operations and two-way quantum communication in spin chains Quantum |
| title | Parallel entangling gate operations and two-way quantum communication in spin chains |
| title_full | Parallel entangling gate operations and two-way quantum communication in spin chains |
| title_fullStr | Parallel entangling gate operations and two-way quantum communication in spin chains |
| title_full_unstemmed | Parallel entangling gate operations and two-way quantum communication in spin chains |
| title_short | Parallel entangling gate operations and two-way quantum communication in spin chains |
| title_sort | parallel entangling gate operations and two way quantum communication in spin chains |
| url | https://quantum-journal.org/papers/q-2021-05-26-460/pdf/ |
| work_keys_str_mv | AT rozhinyousefjani parallelentanglinggateoperationsandtwowayquantumcommunicationinspinchains AT abolfazlbayat parallelentanglinggateoperationsandtwowayquantumcommunicationinspinchains |