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Entangling a nanomechanical resonator and a superconducting microwave cavity
| Content Provider | Semantic Scholar |
|---|---|
| Author | Vitali, David Tombesi, Paolo Milburn, George |
| Copyright Year | 2007 |
| Abstract | Entanglement is one of a number of inherently quantum phenomena that it is hoped will soon be observable in macroscopic mechanical systems 1 . Aside from the interest in studying quantum mechanics in a new regime, entanglement may be used as part of read-out schemes in quantum information processing applications. Methods for entangling a nanomechanical resonator with a Cooper pair box 2 , or an optical mode 3 , for entangling two charge qubits 4 or two Josephson junctions 5 via nanomechanical resonators, and for entangling two nanomechanical resonators via trapped ions 6 , Cooper pair boxes 7 , entanglement swapping 8 , and sudden switching of electrical interactions 9 , have all been proposed. In the earliest proposal 2 , the entanglement provided a means for measuring the decoherence rate of coherent superpositions of nanomechanical resonator states. More recently, a scheme for entangling a superconducting coplanar waveguide field with a nanomechanical resonator, via a Cooper pair box within the waveguide 10 , was proposed. Here we propose a different scheme for entangling the nanomechanical resonator, based on the capacitive coupling of the resonator with the central conductor of the superconducting, coplanar waveguide, and which does not require any Cooper pair box see Ref. 11 for a related proposal . The paper is organized as follows. In Sec. II we derive the quantum Langevin equations QLE of the system and discuss when they can be linearized around the semiclassical steady state. In Sec. III we study the steady state of the system and quantify its entanglement by using the logarithmic negativity, while Sec. IV is for conclusions. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://core.ac.uk/download/pdf/15036780.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Body cavities Box Charge qubit Coherence (physics) Coplanar waveguide Information processing Interaction Ions Microwave Negativity (quantum mechanics) Observable Paging Quantum decoherence Quantum entanglement Quantum information science Quantum mechanics Quantum teleportation Resonator Device Component Semiclassical physics Steady state Waveguide Device Component |
| Content Type | Text |
| Resource Type | Article |
