Recovery of qubit coherence by noise-eater technique

We propose a quantum noise eater for a single qubit and experimentally verify its performance for recovery of a superposition carried by a dual-rail photonic qubit. We consider a case when only one of the rails (e.g., one of interferometric arms) is vulnerable to noise. A coherent but randomly arriving photon penetrating into this single rail causes a change of its state, which results in an error in a subsequent quantum information processing. We theoretically prove and experimentally demonstrate a conditional full recovery of the superposition by this quantum noise eater.

[1]  N. Gisin,et al.  Long-distance teleportation of qubits at telecommunication wavelengths , 2003, Nature.

[2]  G. Leuchs,et al.  Quantum filtering of optical coherent states , 2008 .

[3]  Y. Pashkin,et al.  Coherent control of macroscopic quantum states in a single-Cooper-pair box , 1999, Nature.

[4]  Seth Lloyd,et al.  Universal Control of Decoupled Quantum Systems , 1999 .

[5]  K. B. Whaley,et al.  Robustness of Decoherence-Free Subspaces for Quantum Computation , 1999 .

[6]  M. Dušek,et al.  Quantum noise eater for a single photonic qubit , 2013, 1308.0831.

[7]  Eugene E. Haller,et al.  Solid-state quantum memory using the 31P nuclear spin , 2008, Nature.

[8]  Timothy C. Ralph,et al.  A Guide to Experiments in Quantum Optics , 1998 .

[9]  A. Helmy,et al.  Bandwidth control of paired photons generated in monolithic Bragg reflection waveguides. , 2009, Optics letters.

[10]  Seth Lloyd,et al.  Gaussian quantum information , 2011, 1110.3234.

[11]  G. Burkard,et al.  Spin qubits in graphene quantum dots , 2006, cond-mat/0611252.

[12]  J. Clarke,et al.  Superconducting quantum bits , 2008, Nature.

[13]  D. D. Awschalom,et al.  Quantum information processing using quantum dot spins and cavity QED , 1999 .

[14]  H. Weinfurter,et al.  Experimental quantum teleportation , 1997, Nature.

[15]  O. Alibart,et al.  A quantum relay chip based on telecommunication integrated optics technology , 2011 .

[16]  Fabio Sciarrino,et al.  Teleportation of a vacuum--one-photon qubit. , 2002, Physical review letters.

[17]  R. Filip,et al.  Environment-assisted quantum-information correction for continuous variables , 2009, 0909.3546.

[18]  Steane,et al.  Error Correcting Codes in Quantum Theory. , 1996, Physical review letters.

[19]  Experimental verification of energy correlations in entangled photon pairs , 2003, quant-ph/0306020.

[20]  Thierry Paul,et al.  Quantum computation and quantum information , 2007, Mathematical Structures in Computer Science.

[21]  N. Gisin,et al.  Quantum relays for long distance quantum cryptography , 2003, quant-ph/0311101.

[22]  F. Sciarrino,et al.  Entanglement localization after coupling to an incoherent noisy system , 2009, 0907.2780.

[23]  S. Lloyd,et al.  Quantum-Enhanced Measurements: Beating the Standard Quantum Limit , 2004, Science.

[24]  L. Vandersypen,et al.  Single-shot read-out of an individual electron spin in a quantum dot , 2004, Nature.

[25]  F. Sciarrino,et al.  Complete analysis of measurement-induced entanglement localization on a three-photon system , 2009, 0912.3571.

[26]  Hong,et al.  Measurement of subpicosecond time intervals between two photons by interference. , 1987, Physical review letters.

[27]  W. Zurek.  Decoherence, einselection, and the quantum origins of the classical , 2001, quant-ph/0105127.

[28]  Charles C. Harb,et al.  Feedback control of laser intensity noise , 1998 .

[29]  F. Arecchi,et al.  Nonlocal pulse shaping with entangled photon pairs. , 2003, Physical review letters.

[30]  Jian-Wei Pan,et al.  Experimental entanglement purification of arbitrary unknown states , 2003, Nature.