Topologically protected entanglement switching around exceptional points
- URL: http://arxiv.org/abs/2310.14731v1
- Date: Mon, 23 Oct 2023 09:06:37 GMT
- Title: Topologically protected entanglement switching around exceptional points
- Authors: Zan Tang, Tian Chen, Xing Tang, and Xiangdong Zhang
- Abstract summary: We propose an effective scheme to realize robust operation of quantum entanglement states by designing quadruple degeneracy exceptional points.
Our work opens up a new way for the application of non-Hermitian physics in the field of quantum information.
- Score: 6.457956872856072
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The robust operation of quantum entanglement states are crucial for
applications in quantum information, computing, and communications1-3. However,
it has always been a great challenge to complete such a task because of
decoherence and disorder. Here, we propose theoretically and demonstrate
experimentally an effective scheme to realize robust operation of quantum
entanglement states by designing quadruple degeneracy exceptional points. By
encircling the exceptional points on two overlapping Riemann energy surfaces,
we have realized a chiral switch for entangled states with high fidelity. Owing
to the topological protection conferred by the Riemann surface structure, this
switching of chirality exhibits strong robustness against perturbations in the
encircling path. Furthermore, we have experimentally validated such a scheme on
a quantum walk platform. Our work opens up a new way for the application of
non-Hermitian physics in the field of quantum information.
Related papers
- Experimental topological quantum computing with electric circuits [5.093683847211242]
We report the first experimental realization of topological quantum computation with electric circuits.
Based on our proposed new scheme with circuits, Majorana-like edge states are observed experimentally.
We demonstrate the feasibility of topological quantum computing through a set of one- and two-qubit unitary operations.
arXiv Detail & Related papers (2023-09-09T23:25:46Z) - Adiabatic Shortcuts Completion in Quantum Field Theory: Annihilation of
Created Particles [44.99833362998488]
We investigate the completion of a nonadiabatic evolution into a shortcut to adiabaticity for a quantum field confined within a one-dimensional cavity containing two movable mirrors.
We achieve a smooth extension of the Moore functions that implements the STA.
We draw attention to the existence of a comparable problem within nonrelativistic quantum mechanics.
arXiv Detail & Related papers (2023-08-25T14:19:21Z) - Quantum data learning for quantum simulations in high-energy physics [55.41644538483948]
We explore the applicability of quantum-data learning to practical problems in high-energy physics.
We make use of ansatz based on quantum convolutional neural networks and numerically show that it is capable of recognizing quantum phases of ground states.
The observation of non-trivial learning properties demonstrated in these benchmarks will motivate further exploration of the quantum-data learning architecture in high-energy physics.
arXiv Detail & Related papers (2023-06-29T18:00:01Z) - Suppressing decoherence in quantum state transfer with unitary
operations [1.9662978733004601]
We study an application of quantum state-dependent pre- and post-processing unitary operations for protecting the given (multi-qubit) quantum state.
We observe the increase in the fidelity of the output quantum state both in a quantum emulation experiment and in a real experiment with a cloud-accessible quantum processor.
arXiv Detail & Related papers (2022-08-09T17:41:20Z) - Efficient Bipartite Entanglement Detection Scheme with a Quantum
Adversarial Solver [89.80359585967642]
Proposal reformulates the bipartite entanglement detection as a two-player zero-sum game completed by parameterized quantum circuits.
We experimentally implement our protocol on a linear optical network and exhibit its effectiveness to accomplish the bipartite entanglement detection for 5-qubit quantum pure states and 2-qubit quantum mixed states.
arXiv Detail & Related papers (2022-03-15T09:46:45Z) - Robust Nonadiabatic Holonomic Quantum Gates on Decoherence-Protected
Qubits [4.18804572788063]
We propose a scheme for quantum manipulation by combining the geometric phase approach with the dynamical correction technique.
Our scheme is implemented on the superconducting circuits, which also simplifies previous implementations.
arXiv Detail & Related papers (2021-10-06T14:39:52Z) - Topological quantum state control through exceptional-point proximity [0.33030080038744947]
We study the quantum evolution of a non-Hermitian qubit realized as a submanifold of a dissipative superconducting transmon circuit.
Real-time tuning of the system parameters to encircle an exceptional point results in non-reciprocal quantum state transfer.
arXiv Detail & Related papers (2021-08-11T18:00:03Z) - Realization of arbitrary doubly-controlled quantum phase gates [62.997667081978825]
We introduce a high-fidelity gate set inspired by a proposal for near-term quantum advantage in optimization problems.
By orchestrating coherent, multi-level control over three transmon qutrits, we synthesize a family of deterministic, continuous-angle quantum phase gates acting in the natural three-qubit computational basis.
arXiv Detail & Related papers (2021-08-03T17:49:09Z) - Experimental Realization of Nonadiabatic Holonomic Single-Qubit Quantum
Gates with Two Dark Paths in a Trapped Ion [41.36300605844117]
We show nonadiabatic holonomic single-qubit quantum gates on two dark paths in a trapped $171mathrmYb+$ ion based on four-level systems with resonant drives.
We find that nontrivial holonomic two-qubit quantum gates can also be realized within current experimental technologies.
arXiv Detail & Related papers (2021-01-19T06:57:50Z) - Topologically protected strong coupling and entanglement between distant
quantum emitters [8.994265027295684]
The duration of quantum beats for such entanglement can reach several orders longer than that for the entanglement in a conventional photonic cavity.
We numerically prove that the topologically protected entanglement between two QEs can also be realized.
arXiv Detail & Related papers (2020-10-25T09:50:48Z) - Einselection from incompatible decoherence channels [62.997667081978825]
We analyze an open quantum dynamics inspired by CQED experiments with two non-commuting Lindblad operators.
We show that Fock states remain the most robust states to decoherence up to a critical coupling.
arXiv Detail & Related papers (2020-01-29T14:15:19Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.