Entanglement generated by dissipation and steady state entanglement of two macroscopic objects.

  title={Entanglement generated by dissipation and steady state entanglement of two macroscopic objects.},
  author={Hanna Krauter and Christine A. Muschik and Kasper Jensen and Wojciech Wasilewski and J. M. Petersen and Juan Ignacio Cirac and Eugene Simon Polzik},
  journal={Physical review letters},
  volume={107 8},
Entanglement is a striking feature of quantum mechanics and an essential ingredient in most applications in quantum information. Typically, coupling of a system to an environment inhibits entanglement, particularly in macroscopic systems. Here we report on an experiment where dissipation continuously generates entanglement between two macroscopic objects. This is achieved by engineering the dissipation using laser and magnetic fields, and leads to robust event-ready entanglement maintained for… 

Figures from this paper

Engineering steady-state entanglement via dissipation in coupled cavities

We present a scheme for the dissipative preparation of an entangled steady state between two atomic qubits separately trapped in the coupled cavities. The combination of coherent driving fields and

Entanglement between distant macroscopic mechanical and spin systems

Entanglement is an essential property of multipartite quantum systems, characterized by the inseparability of quantum states of objects regardless of their spatial separation. Generation of

Entangling nuclear spins by dissipation in a solid-state system

Entanglement is a fascinating feature of quantum mechanics and a key ingredient in most quantum information processing tasks. Yet the generation of entanglement is usually hampered by undesired

Unconditional Steady-State Entanglement in Macroscopic Hybrid Systems by Coherent Noise Cancellation.

This work proposes and analyze a generic approach to steady-state entanglement generation between two oscillators with different temperatures and decoherence properties coupled in cascade to a common unidirectional light field and finds its unconditional scheme to deliver a virtually identical performance when operated optimally.

Distributed entanglement induced by dissipative bosonic media

We describe a scheme with analytic result that allows to generate steady-state entanglement for two atoms over a dissipative bosonic medium. The resonant coupling between the mediating bosonic mode

Dissipative production of a maximally entangled steady state of two quantum bits

The demonstration of an entangled steady state of two qubits represents a step towards dissipative state engineering, dissipative quantum computation and dissipative phase transitions and engineered coupling to the environment may be applied to a broad range of experimental systems to achieve desired quantum dynamics or steady states.

Dissipative preparation of distributed steady entanglement: an approach of unilateral qubit driving.

A nonlocal scheme for preparing a distributed steady-state entanglement of two atoms trapped in separate optical cavities coupled through an optical fiber based on the combined effect of the unitary dynamics and dissipative process that guarantees the absolute security of long distance quantum information processing tasks.

Quantum-beat based dissipation for spin squeezing and light entanglement.

It is shown that for particular parameters, the engineered dissipation induces almost perfect two-mode squeezing and entanglement both for the bright fields and for the dressed spins.

Autonomous quantum thermal machine for generating steady-state entanglement

We discuss a simple quantum thermal machine for the generation of steady-state entanglement between two interacting qubits. The machine is autonomous in the sense that it uses only incoherent

Steady entanglement out of thermal equilibrium

We study two two-level atomic quantum systems (qubits) placed close to a body held at a temperature different from that of the surrounding walls. While at thermal equilibrium the two-qubit dynamics




  • Rev. A 83, 052312
  • 2011


  • Mod. Phys. 82, 1041
  • 2010

I and J

Nature 413

  • 400
  • 2001


  • Rep. 443, 97
  • 2007

The effective dephasing rate associated with noise effects

    Nature 453

    • 1023
    • 2008

    First results demonstrating the creation of entanglement by dissipation are reportet in the unpublished paper

    • 2010


    • Rev. Lett. 104, 073604
    • 2010


    • Rev. Lett. 88, 197901 (2002); B. Kraus and J. I. Cirac, Phys. Rev. Lett. 92, 013602 (2004); S. Diehl et al., Nature Phys. 4, 878 (2008); F. Verstraete, M. M. Wolf, and J. I. Cirac, Nature Phys. 5, 633 (2009); J. T. Barreiro, et al., Nature 470, 486 (2011). A. S. Parkins, E. Solano, and J. I. Cirac,
    • 2006