TY - JOUR
T1 - Security trade-offs in ancilla-free quantum bit commitment in the presence of superselection rules
AU - DiVincenzo, David P.
AU - Smolin, John A.
AU - Terhal, Barbara M.
PY - 2004
Y1 - 2004
N2 - Security trade-offs have previously been established for one-way bit commitment. We study this trade-off in two superselection settings. We show that for an 'abelian' superselection rule (exemplified by particle conservation), the standard trade-off between sealing and binding properties still holds. For the non-abelian case (exemplified by angular momentum conservation), the security trade-off can be more subtle, which we illustrate by showing that if the bit commitment is forced to be ancilla-free, an asymptotically secure quantum bit commitment is possible.
AB - Security trade-offs have previously been established for one-way bit commitment. We study this trade-off in two superselection settings. We show that for an 'abelian' superselection rule (exemplified by particle conservation), the standard trade-off between sealing and binding properties still holds. For the non-abelian case (exemplified by angular momentum conservation), the security trade-off can be more subtle, which we illustrate by showing that if the bit commitment is forced to be ancilla-free, an asymptotically secure quantum bit commitment is possible.
UR - http://www.scopus.com/inward/record.url?scp=4644304620&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/6/1/080
DO - 10.1088/1367-2630/6/1/080
M3 - Article
AN - SCOPUS:4644304620
SN - 1367-2630
VL - 6
SP - 1
EP - 9
JO - New Journal of Physics
JF - New Journal of Physics
ER -