Measurement-Altered Ising Quantum Criticality
Quantum critical systems constitute appealing platforms for exploring novel measurement-induced phenomena due to their innate sensitivity to perturbations. We study the impact of measurements on paradigmatic Ising quantum-critical chains using an explicit protocol, whereby correlated ancillae are en...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-12-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.13.041042 |
| _version_ | 1827594980329259008 |
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| author | Sara Murciano Pablo Sala Yue Liu Roger S. K. Mong Jason Alicea |
| author_facet | Sara Murciano Pablo Sala Yue Liu Roger S. K. Mong Jason Alicea |
| author_sort | Sara Murciano |
| collection | DOAJ |
| description | Quantum critical systems constitute appealing platforms for exploring novel measurement-induced phenomena due to their innate sensitivity to perturbations. We study the impact of measurements on paradigmatic Ising quantum-critical chains using an explicit protocol, whereby correlated ancillae are entangled with the critical chain and then projectively measured. Using a perturbative analytic framework supported by extensive numerical simulations, we demonstrate that measurements can qualitatively alter critical correlations in a manner dependent on the choice of entangling gate, ancilla measurement basis, measurement outcome, and nature of ancilla correlations. We further show that measurement-altered Ising criticality can be pursued surprisingly efficiently in experiments featuring of order 100 qubits by postselecting for high-probability measurement outcomes or, in certain cases, by averaging observables separately over measurement outcomes residing in distinct symmetry sectors. Our framework naturally adapts to more exotic quantum-critical points and highlights opportunities for realization in noisy intermediate-scale quantum hardware and in Rydberg arrays. |
| first_indexed | 2024-03-09T02:45:05Z |
| format | Article |
| id | doaj.art-40a650f802694448a24533677ca7bf63 |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-03-09T02:45:05Z |
| publishDate | 2023-12-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-40a650f802694448a24533677ca7bf632023-12-05T17:09:34ZengAmerican Physical SocietyPhysical Review X2160-33082023-12-0113404104210.1103/PhysRevX.13.041042Measurement-Altered Ising Quantum CriticalitySara MurcianoPablo SalaYue LiuRoger S. K. MongJason AliceaQuantum critical systems constitute appealing platforms for exploring novel measurement-induced phenomena due to their innate sensitivity to perturbations. We study the impact of measurements on paradigmatic Ising quantum-critical chains using an explicit protocol, whereby correlated ancillae are entangled with the critical chain and then projectively measured. Using a perturbative analytic framework supported by extensive numerical simulations, we demonstrate that measurements can qualitatively alter critical correlations in a manner dependent on the choice of entangling gate, ancilla measurement basis, measurement outcome, and nature of ancilla correlations. We further show that measurement-altered Ising criticality can be pursued surprisingly efficiently in experiments featuring of order 100 qubits by postselecting for high-probability measurement outcomes or, in certain cases, by averaging observables separately over measurement outcomes residing in distinct symmetry sectors. Our framework naturally adapts to more exotic quantum-critical points and highlights opportunities for realization in noisy intermediate-scale quantum hardware and in Rydberg arrays.http://doi.org/10.1103/PhysRevX.13.041042 |
| spellingShingle | Sara Murciano Pablo Sala Yue Liu Roger S. K. Mong Jason Alicea Measurement-Altered Ising Quantum Criticality Physical Review X |
| title | Measurement-Altered Ising Quantum Criticality |
| title_full | Measurement-Altered Ising Quantum Criticality |
| title_fullStr | Measurement-Altered Ising Quantum Criticality |
| title_full_unstemmed | Measurement-Altered Ising Quantum Criticality |
| title_short | Measurement-Altered Ising Quantum Criticality |
| title_sort | measurement altered ising quantum criticality |
| url | http://doi.org/10.1103/PhysRevX.13.041042 |
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