A modular design of molecular qubits to implement universal quantum gates.
The physical implementation of quantum information processing relies on individual modules-qubits-and operations that modify such modules either individually or in groups-quantum gates. Two examples of gates that entangle pairs of qubits are the controlled NOT-gate (CNOT) gate, which flips the state of one qubit depending on the state of another, and the gate that brings a two-qubit product state into a superposition involving partially swapping the qubit states. Here we show that through supramolecular chemistry a single simple module, molecular {Cr7Ni} rings, which act as the qubits, can be assembled into structures suitable for either the CNOT or gate by choice of linker, and we characterize these structures by electron spin resonance spectroscopy. We introduce two schemes for implementing such gates with these supramolecular assemblies and perform detailed simulations, based on the measured parameters including decoherence, to demonstrate how the gates would operate.
School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Jesús
J
Ferrando-Soria
School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Eufemio
0000-0002-9643-0341
E
Moreno Pineda
Dipartimento di Fisica e Scienze della Terra, Università di Parma, viale delle Scienze 7/a, Parma 43123, Italy.
Alessandro
A
Chiesa
School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Antonio
A
Fernandez
School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Samantha A
SA
Magee
Dipartimento di Fisica e Scienze della Terra, Università di Parma, viale delle Scienze 7/a, Parma 43123, Italy.
Stefano
S
Carretta
Dipartimento di Fisica e Scienze della Terra, Università di Parma, viale delle Scienze 7/a, Parma 43123, Italy.
Paolo
P
Santini
School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Iñigo J
IJ
Vitorica-Yrezabal
School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Floriana
F
Tuna
School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Grigore A
GA
Timco
School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Eric J L
EJ
McInnes
School of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Richard E P
RE
Winpenny