TY - JOUR

T1 - Entangled states of signal pulses in multimode quantum memory

AU - Tikhonov, K.S.

AU - Golubeva, T.Y.

AU - Golubev, Y.M.

PY - 2015

Y1 - 2015

N2 - © 2015, Pleiades Publishing, Ltd. The possibility of preserving an entangled state of two signal pulses during writing and retrieval processes in a multimode quantum memory is investigated. Two stationary laser sources of light squeezed in two orthogonal quadratures are used for generation of the entangled state. “Carved out” pulses of appropriate duration are mixed on a symmetric beamsplitter, which allows obtaining the desired entanglement. It is assumed that each of the obtained entangled pulses is stored in a separate memory cell and subsequently retrieved from it. The obtained analytical expressions for Duan entanglement criterion are analyzed numerically for the case of broadband memory. It is demonstrated that the entanglement of pulses can be effectively preserved not only in the case of symmetric geometry of the experiment, wherein both pulses are written in two identical independent memory cells, but also in the case of different memory cells and even when one of the cells is absent completely. An i

AB - © 2015, Pleiades Publishing, Ltd. The possibility of preserving an entangled state of two signal pulses during writing and retrieval processes in a multimode quantum memory is investigated. Two stationary laser sources of light squeezed in two orthogonal quadratures are used for generation of the entangled state. “Carved out” pulses of appropriate duration are mixed on a symmetric beamsplitter, which allows obtaining the desired entanglement. It is assumed that each of the obtained entangled pulses is stored in a separate memory cell and subsequently retrieved from it. The obtained analytical expressions for Duan entanglement criterion are analyzed numerically for the case of broadband memory. It is demonstrated that the entanglement of pulses can be effectively preserved not only in the case of symmetric geometry of the experiment, wherein both pulses are written in two identical independent memory cells, but also in the case of different memory cells and even when one of the cells is absent completely. An i

U2 - 10.1134/S0030400X15050264

DO - 10.1134/S0030400X15050264

M3 - Article

VL - 118

SP - 773

EP - 780

JO - OPTICS AND SPECTROSCOPY

JF - OPTICS AND SPECTROSCOPY

SN - 0030-400X

IS - 5

ER -