T.-C. Wei

Publications (3)7.37 Total impact

• Source

  Available from: illinois.edu

  Article: Remote State Preparation: Arbitrary remote control of photon polarizations for quantum communication

  N A Peters, J T Barreiro, M E Goggin, T.-C Wei, P G Kwiat
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  ABSTRACT: By using a partial polarizer to apply a generalized polarization measurement to one photon of a polarization-entangled pair, we remotely prepare single photons in arbitrary polarization qubits. Specifically, we are able to produce a range of states of any desired degree of mixedness or purity, over (and within) the entire Poincaré sphere, with a typical fidelity exceeding 99.5%. Moreover, by using non-degenerate entangled pairs as a resource, we can prepare states in multiple wavelengths. Finally, we discuss the states remotely preparable given a particular two-qubit resource state.
  08/2005;
• Conference Proceeding: Arbitrary remote state preparation of photon polarization

  N.A. Peters, J.T. Barreiro, M.E. Goggin, T.-C. Wei, P. G. Kwiat
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  ABSTRACT: We describe the first experimental realization of arbitrary single-qubit remote state preparation. Specifically, a generalized measurement on one photon of a polarization-entangled pair conditionally prepares the remaining photon in an arbitrary desired state.
  Quantum Electronics and Laser Science Conference, 2005. QELS '05; 06/2005
• Source

  Available from: arxiv.org

  Article: Ancilla-assisted quantum process tomography.

  J B Altepeter, D Branning, E Jeffrey, T C Wei, P G Kwiat, R T Thew, J L O'Brien, M A Nielsen, A G White
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  ABSTRACT: Complete and precise characterization of a quantum dynamical process can be achieved via the method of quantum process tomography. Using a source of correlated photons, we have implemented several methods, each investigating a wide range of processes, e.g., unitary, decohering, and polarizing. One of these methods, ancilla-assisted process tomography (AAPT), makes use of an additional "ancilla system," and we have theoretically determined the conditions when AAPT is possible. Surprisingly, entanglement is not required. We present data obtained using both separable and entangled input states. The use of entanglement yields superior results, however.
  Physical Review Letters 06/2003; 90(19):193601. · 7.37 Impact Factor