caa a22 4500 445868139 CHVBK 20180317145504.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1140/epjd/e2010-09653-x doi (NATIONALLICENCE)springer-10.1140/epjd/e2010-09653-x 2N qubit "mirror states” for optimal quantum communication [Elektronische Daten] [S. Muralidharan, S. Karumanchi, S. Jain, R. Srikanth, P. K. Panigrahi] Abstract.: We introduce a new genuinely 2N qubit state, known as the "mirror state” with interesting entanglement properties. The well known Bell and the cluster states form a special case of these "mirror states”, for N = 1 and N = 2 respectively. It can be experimentally realized using SWAP and multiply controlled phase shift operations. After establishing the general conditions for a state to be useful for various communicational protocols involving quantum and classical information, it is shown that the present state can optimally implement algorithms for the quantum teleportation of an arbitrary N qubit state and achieve quantum information splitting in all possible ways. With regard to superdense coding, one can send 2N classical bits by sending only N qubits and consuming N ebits of entanglement. Explicit comparison of the mirror state with the rearranged N Bell pairs and the linear cluster states is considered for these quantum protocols. We also show that mirror states are more robust than the rearranged Bell pairs with respect to a certain class of collisional decoherence. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Muralidharan S. School of EPS, Heriot-Watt University, Edinburgh EH144, AS, UK aut Karumanchi S. Birla Institute of Technology and Science, Pilani, 333031, Rajasthan, India aut Jain S. Indian Institute of Technology Bombay, Mumbai, India aut Srikanth R. Poornaprajna Institute of Scientific Research, Devanahalli, 562110, Bangalore, India aut Panigrahi P. K. Indian Institute of Science Education and Research (IISER) Kolkata, Salt Lake, 700106, Kolkata, India aut The European Physical Journal D Springer-Verlag 61/3(2011-02-01), 757-763 1434-6060 61:3<757 2011 61 10053 https://doi.org/10.1140/epjd/e2010-09653-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2010-09653-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Muralidharan S. School of EPS, Heriot-Watt University, Edinburgh EH144, AS, UK aut NATIONALLICENCE 700 1- Karumanchi S. Birla Institute of Technology and Science, Pilani, 333031, Rajasthan, India aut NATIONALLICENCE 700 1- Jain S. Indian Institute of Technology Bombay, Mumbai, India aut NATIONALLICENCE 700 1- Srikanth R. Poornaprajna Institute of Scientific Research, Devanahalli, 562110, Bangalore, India aut NATIONALLICENCE 700 1- Panigrahi P. K. Indian Institute of Science Education and Research (IISER) Kolkata, Salt Lake, 700106, Kolkata, India aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 61/3(2011-02-01), 757-763 1434-6060 61:3<757 2011 61 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer