Conditional sign flip via teleportation
arXiv:quant-ph/0404139 · doi:10.1103/PhysRevA.70.022319
Abstract
We present a model to realize a probabilistic conditional sign flip gate using only linear optics. The gate operates in the space of number state qubits and is obtained by a nonconventional use of the teleportation protocol. Both a destructive and a nondestructive version of the gate are presented. In the former case an Hadamard gate on the control qubit is combined with a projective teleportation scheme mixing control and target. The success probability is 1/2. In the latter case we need a quantum encoder realized via the interaction of the control qubit with an ancillary state composed of two maximally entangled photons. The success probability is 1/4.
References in corpus (15)
- Quantum Computation with Quantum Dots
- Coherent control of macroscopic quantum states in a single-Cooper-pair box
- The Physical Implementation of Quantum Computation
- Quantum Teleportation is a Universal Computational Primitive
- Experimental realization of Shor's quantum factoring algorithm using nuclear magnetic resonance
- Optical quantum computation using cluster states
- Probabilistic Quantum Logic Operations Using Polarizing Beam Splitters
- Experimental Controlled-NOT Logic Gate for Single Photons in the Coincidence Basis
- Entanglement formation and violation of Bell's inequality with a semiconductor single photon source
- Quantum teleportation with a quantum dot single photon source
- Quantum Bit Regeneration
- Experimental nonlinear sign shift for linear optics quantum computation
- ''Active'' Teleportation of a Quantum Bit
- Probabilistic Quantum Encoder for Single-Photon Qubits
- Comparison of LOQC C-sign gates with ancilla inefficiency and an improvement to functionality under these conditions