Quantum computation with trapped polar molecules.

By D. DeMille. Physical Review Letters, 2001

1,023 citations recorded by the source corpus.

We propose a novel physical realization of a quantum computer. The qubits are electric dipole moments of ultracold diatomic molecules, oriented along or against an external electric field. Individual molecules are held in a 1D trap array, with an electric field gradient allowing spectroscopic addressing of each site. Bits are coupled via the electric dipole-dipole interaction. Using technologies similar to those already demonstrated, this design can plausibly lead to a quantum computer with greater, approximately > or = 10(4) qubits, which can perform approximately 10(5) CNOT gates in the anticipated decoherence time of approximately 5 s.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/3857084a1ad797c9e5afed44f20c26f052c0e6d8

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Citations in the corpus

Cold and ultracold molecules: science, technology and applications (2009, background): “Under realistic conditions (described in detail in [48]), decoherence lifetimes limited by Raman scattering rates in the regime R ∼ 1 − 10 s may be achievable, corresponding to Ng ∼ 10(5) − 10(6).”
Feshbach resonances in ultracold gases (2008, background): “ipole moments. These molecules, which are either bosonic or fermionic, have many applications in dipolar molecular quantum gases (Bu¨chler et al., 2007; Micheli et al., 2006) and quantum computation (DeMille, 2002). 1. Chromium In 2005 (Griesmaier et al., 2005) announced BEC of 52Cr atoms. This spec”
Taming molecular beams (2008, background): “The strong electric dipoledipole interactions offers also interesting prospects in quantum computation schemes [70, 71].”
Editorial: Quo vadis, cold molecules? (2004, background): “The scheme invokes ultracold ground-state molecules trapped in a one-dimensional optical lattice combined with an inhomogeneous electrostatic field [24].”
Theoretical progress in many-body physics with ultracold dipolar gases (2008, background): “, [22–25]), as well as experimental conditions required for observations of theoretical results.”
Robust Encoding of a Qubit in a Molecule (2019, background): “Hence, proposals for storing quantum information in molecules [12–23] (see also [24, 25]) typically pick out two low-lying long-lived energy eigenstates as basis states for a qubit.”
Production and application of translationally cold molecules (2003, background): “Coupling between the bits occurs via the electric dipole–dipole interaction (DeMille 2002).”
All-optical preparation of molecular ions in the rovibrational ground state (2010, background): “The rotationally, vibrationally, and translationally cold molecular ion ensemble is suitable for a number of applications, such as generation of long-lived coherences, systems with dipolar interactions [16], and frequency metrology of fundamental constants [17][18].”
A toolbox for lattice-spin models with polar molecules (2005, background): “First, unlike the atomic case where electronically excited states are typically anti-trapped by an optical lattice, here both ground and excited rotational states are trapped by an essentially identical potential up to tensor shift”
An ultracold high-density sample of rovibronic ground-state molecules in an optical lattice (2009, neutral): “and future applications in quantum information scienc”
A coherent all-electrical interface between polar molecules and mesoscopic superconducting resonators (2006, background): “Although it has already been shown that the free-space dipole–dipole coupling of polar molecules is viable for carrying out quantum operation”