Memory-enhanced noiseless cross-phase modulation

Mahdi Hosseini; Stojan Rebić; Ben M Sparkes; Jason Twamley; Ben C Buchler; Ping K Lam

doi:10.1038/lsa.2012.40

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Memory-enhanced noiseless cross-phase modulation

Original Article

- Memory-enhanced noiseless cross-phase modulation
- Light: Science & Applications Vol. 1, Issue 1, (2012)
- Affiliations：
  
  1.Centre for Quantum Computation and Communication Technology, Department of Quantum Science, The Australian National University, Canberra, Australia
  2.Centre for Engineered Quantum Systems, Department of Physics & Astronomy, Macquarie University, North Ryde NSW 2109, Australia
- Author bio：
  
  Professor PK Lam, Centre for Quantum Computation and Communication Technology, Department of Quantum Science, Bld 38A, The Australian National University, Canberra ACT 0200, Australia. E-mail: Ping.Lam@anu.edu.au
- Funds：
- DOI：10.1038/lsa.2012.40
  CLC：
- Published：2012-03，
  
  Published Online：07 December 2012，
  
  Received：09 May 2012，
  
  Revised：12 July 2012，
  
  Accepted：16 July 2012
- Accepted：
Scan QR Code
Hosseini, M. et al. Memory-enhanced noiseless cross-phase modulation. Light: Science & Applications, 1, e40 (2012).
DOI：

Hosseini, M. et al. Memory-enhanced noiseless cross-phase modulation. Light: Science & Applications, 1, e40 (2012). DOI： 10.1038/lsa.2012.40.

摘要

Abstract

Large nonlinearity at the single-photon level can pave the way for the implementation of universal quantum gates. However

realizing large and noiseless nonlinearity at such low light levels has been a great challenge for scientists in the past decade. Here

we propose a scheme that enables substantial nonlinear interaction between two light fields that are both stored in an atomic memory. Semiclassical and quantum simulations demonstrate the feasibility of achieving large cross-phase modulation (XPM) down to the single-photon level. The proposed scheme can be used to implement parity gates from which CNOT gates can be constructed. Furthermore

we present a proof of principle experimental demonstration of XPM between two optical pulses: one stored and one freely propagating through the memory medium.

关键词

Keywords

CNOT gatecross-phase modulationelectromagnetically induced transparencyparity gatequantum memory

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