Optimal entanglement generation in GHZ-type states
arXiv:2310.17365 · doi:10.1088/1751-8121/ad0a44
Abstract
The entanglement production is key for many applications in the realm of quantum information, but so is the identification of processes that allow to create entanglement in a fast and sustained way. Most of the advances in this direction have been circumscribed to bipartite systems only, and the rate of entanglement in multipartite system has been much less explored.Here we contribute to the identification of processes that favor the fastest and sustained generation of tripartite entanglement in a class of 3-qubit GHZ-type states. By considering a three-party interaction Hamiltonian, we analyse the dynamics of the 3-tangle and the entanglement rate to identify the optimal local operations that supplement the Hamiltonian evolution in order to speed-up the generation of three-way entanglement, and to prevent its decay below a predetermined threshold value. The appropriate local operation that maximizes the speed at which a highly-entangled state is reached has the advantage of requiring access to only one of the qubits, yet depends on the actual state of the system. Other universal (state-independent) local operations are found that conform schemes to maintain a sufficiently high amount of 3-tangle. Our results expand our understanding of entanglement rates to multipartite systems, and offer guidance regarding the strategies that improve the efficiency in various quantum information processing tasks.
arXiv comment11 pages, 11 figures
References in corpus (23)
- Quantum entanglement
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Three qubits can be entangled in two inequivalent ways
- Quantum secret sharing
- Entanglement of a Pair of Quantum Bits
- Distributed Entanglement
- Entanglement detection
- Universal state inversion and concurrence in arbitrary dimensions
- Generation of Three-Qubit Entangled States using Superconducting Phase Qubits
- On the Entangling Power of Quantum Evolutions
- A classification of entanglement in three-qubit systems
- Deterministic secure direct communication using GHZ states and swapping quantum entanglement
- Entanglement capabilities of non-local Hamiltonians
- On the capacities of bipartite Hamiltonians and unitary gates
- A Triangle Governs Genuine Tripartite Entanglement
- Entanglement rates and area laws
- Upper bounds on entangling rates of bipartite Hamiltonians
- Demonstration of tunable three-body interactions between superconducting qubits
- Entanglement capability of self-inverse Hamiltonian evolution
- Entangling three qubits without ever touching
- Quantum entanglement generation on magnons assisted with microwave cavities coupled to a superconducting qubit
- Entanglement Capacity of Nonlocal Hamiltonians : A Geometric Approach
- Generating multipartite spin states with fermionic atoms in a driven optical lattice