|
1
|
Wang Y, Hao ZY, Li JK, Liu ZH, Sun K, Xu JS, Li CF, Guo GC. Observation of Non-Markovian Evolution of Einstein-Podolsky-Rosen Steering. PHYSICAL REVIEW LETTERS 2023; 130:200202. [PMID: 37267573 DOI: 10.1103/physrevlett.130.200202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 03/09/2023] [Accepted: 04/24/2023] [Indexed: 06/04/2023]
Abstract
Einstein-Podolsky-Rosen (EPR) steering is a type of characteristic nonlocal correlation and provides an important resource in quantum information tasks, especially in view of its asymmetric property. Although plenty of works on EPR steering have been reported, the study of non-Markovian evolution of EPR steering, in which the interactions between the quantum system and surrounding environment are taken into consideration, still lacks intuitive experimental evidence. Here, we experimentally observe the non-Markovian evolution of EPR steering including its sudden death and revival processes, during which the degree of memory effect plays a key role in the recovery of steering. Additionally, a strict unsteerable feature is sufficiently verified during the non-Markovian evolution within multisetting measurements. This Letter, revealing the whole evolution of EPR steering under the non-Markovian process, provides incisive insight into the applications of EPR steering in quantum open systems.
Collapse
Affiliation(s)
- Yan Wang
- 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
- 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Ze-Yan Hao
- 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
- 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Jia-Kun Li
- 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
- 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Zheng-Hao Liu
- 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
- 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Kai Sun
- 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
- 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
| | - Jin-Shi Xu
- 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
- 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
- 3Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| | - Chuan-Feng Li
- 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
- 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
- 3Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| | - Guang-Can Guo
- 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
- 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
- 3Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| |
Collapse
|
|
2
|
Wang S, Xiao Y, Gu YJ. Reliable experimental manipulation of quantum steering direction. OPTICS EXPRESS 2023; 31:14771-14784. [PMID: 37157334 DOI: 10.1364/oe.486398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Noise-adding methods have been widely used to manipulate the direction of quantum steering, but all related experimental schemes only worked under the assumption that Gaussian measurements were performed and ideal target states were accurately prepared. Here, we prove, and then experimentally observe, that a class of two-qubit states can be flexibly changed among two-way steerable, one-way steerable and no-way steerable, by adding either phase damping noise or depolarization noise. The steering direction is determined by measuring steering radius and critical radius, each of which represents a necessary and sufficient steering criterion valid for general projective measurements and actually prepared states. Our work provides a more efficient and rigorous way to manipulate the direction of quantum steering, and can also be employed to manipulate other types of quantum correlations.
Collapse
|