Remotely Controlled Entanglement Generation

Abstract

We consider a system of multiple qubits without any quantum control. We show that one can mediate entanglement between different subsystems in a controlled way by adding a (locally) controlled auxiliary system of the same size that couples via an always-on, distant dependent interaction to the system qubits. Solely by changing the internal state of the control system, one can selectively couple it to selected qubits, and ultimately generate different kinds of entanglement within the system. This provides an alternative way for quantum control and quantum gates that does not rely on the ability to switch interactions on and off at will, and can serve as a locally controlled quantum switch where all entanglement patterns can be created. We demonstrate that such an approach also offers an increased error tolerance w.r.t. position fluctuations.

arXiv comment15 + 7 pages, 5 figures, 3 tables

References in corpus (21)

• Measurement-based quantum computation
• Multi-party entanglement in graph states
• Effective quantum spin systems with ion traps
• A Rydberg Quantum Simulator
• Stabilizer Codes and Quantum Error Correction
• Local Distinguishability of Multipartite Orthogonal Quantum States
• Quantum Approximate Optimization of the Long-Range Ising Model with a Trapped-Ion Quantum Simulator
• NetSquid, a NETwork Simulator for QUantum Information using Discrete events
• Quantum information scrambling in a trapped-ion quantum simulator with tunable range interactions
• Local unitary equivalence of multipartite pure states
• Local unitary equivalence and entanglement of multipartite pure states
• Measurement based entanglement under conditions of extreme photon loss
• Multipartite Entanglement and Global Information
• Measurement-based Quantum Communication
• Optimal distributed sensing in noisy environments
• Controllability of Symmetric Spin Networks
• Approximate decoherence free subspaces for distributed sensing
• Remote entanglement preparation
• Entanglement in Graph States and its Applications
• Dynamical Decomposition of Bilinear Control Systems subject to Symmetries
• Noisy distributed sensing in the Bayesian regime

Cited by in corpus (3)

• A modular entanglement-based quantum computer architecture
• A Quantum Simulator Based on Locally Controlled Logical Systems
• Quantum computation with logical gates between hot systems