Deterministic polarization entanglement purification using time-bin entanglement

We present a deterministic entanglement purification protocol (EPP) working with the currently available experiment techniques. In this protocol, we exploit the robust time-bin entanglement to purify the polarization entanglement determinately, which is quite different from the previous EPPs. After purification, the two parties in quantum communication can obtain a maximally entangled photon pair from each transmitted over a polarization-noise channel with a success probability of 100%, in principle. As the maximal polarization entanglement is of utmost importance in long-distance quantum communication, this protocol may be very useful in future applications.