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Quantum computation with diatomic bits in optical lattices

Chaohong Lee, Elena A. Ostrovskaya
2005 Physical Review A. Atomic, Molecular, and Optical Physics  
We propose a scheme for scalable and universal quantum computation using diatomic bits with conditional dipole-dipole interaction, trapped within an optical lattice.  ...  The realization of a universal set of quantum logic gates, which is composed of single-bit operations and a two-bit controlled-NOT gate, is presented. The readout method is also discussed.  ...  In this article, we suggest a new scheme for quantum computation based upon diatomic qubits with conditional electric dipole-dipole interactions.  ... 
doi:10.1103/physreva.72.062321 fatcat:rusk44fjnba2tllzvzctkxfqoq

Analysis of mutual communication between qubits by capacitive coupling

Takahiro Murakami, Masataka Iinuma, Tohru Takahashi, Yutaka Kadoya, Masamichi Yamanishi
2003 Physical Review A. Atomic, Molecular, and Optical Physics  
Therefore a quantum gate could be constructed by the same operation sequence for the NMR device if the coupling is small enough.  ...  We found that the interaction is essentially the same as the one for the dipole-dipole interaction; i.e., qubit-qubit coupling of the NMR quantum gate.  ...  Since these two different conditions for a 1(2) could affect the precision of the quantum gate operation, we evaluated both cases.  ... 
doi:10.1103/physreva.67.050301 fatcat:egh273z2zjgldhpwvkrbortzoe

Localization in Fractonic Random Circuits

Shriya Pai, Michael Pretko, Rahul M. Nandkishore
2019 Physical Review X  
Fractonic operators exhibit a short time linear growth of observable entanglement with saturation to an area law, as well as a subthermal volume law for operator entanglement.  ...  We study the spreading of initially-local operators under unitary time evolution in a 1d random quantum circuit model which is constrained to conserve a U(1) charge and its dipole moment, motivated by  ...  with gates of different sizes (with open boundary conditions).  ... 
doi:10.1103/physrevx.9.021003 fatcat:6og6xadserh5zkdvaqy34e4dee

Phase gate and readout with an atom-molecule hybrid platform

Elena Kuznetsova, Marko Gacesa, Susanne F. Yelin, Robin Côté
2010 Physical Review A. Atomic, Molecular, and Optical Physics  
a gate.  ...  molecules to interact via their dipole-dipole interaction.  ...  On the other hand, conditional conversion of a pair of atoms into a polar molecule leads to strong dipole-dipole interaction, resulting in fast two-qubit gates.  ... 
doi:10.1103/physreva.81.030301 fatcat:xrkclqhcznclrn34e4mcoosxfe

Work Function Adjustment by Using Dipole Engineering for TaN-Al2O3-Si3N4-HfSiOx-Silicon Nonvolatile Memory

Yu-Hsien Lin, Yi-Yun Yang
2015 Materials  
The threshold voltage shift achieved by using dipole engineering could enable work function adjustment for NVM devices.  ...  This NVM device has a high program/erase (P/E) speed; a 2-V memory window can be achieved by applying 16 V for 10 μs.  ...  conditions.  ... 
doi:10.3390/ma8085112 pmid:28793494 pmcid:PMC5455487 fatcat:lvhzgz5kuzf33buthufvsqngqi

Implementation of quantum logic gates using polar molecules in pendular states

Jing Zhu, Sabre Kais, Qi Wei, Dudley Herschbach, Bretislav Friedrich
2013 Journal of Chemical Physics  
We present a systematic approach to implementation of basic quantum logic gates operating on polar molecules in pendular states as qubits for a quantum computer.  ...  Our simulation results indicate that NOT, Hadamard and CNOT gates can be realized with high fidelity for such pendular qubit states.  ...  For support of this work at Purdue, we are grateful to the National Science Foundation CCI center, "Quantum Information for Quantum Chemistry (QIQC)," Award No.  ... 
doi:10.1063/1.4774058 pmid:23320665 fatcat:g7xlcqvdobgy3ibll5frusuvfm

Fast Rydberg gates without dipole blockade via quantum control

M. Cozzini, T. Calarco, A. Recati, P. Zoller
2006 Optics Communications  
We propose a scheme for controlling interactions between Rydberg-excited neutral atoms in order to perform a fast high-fidelity quantum gate.  ...  Unlike dipole-blockade mechanisms already found in the literature, we drive resonantly the atoms with a state-dependent excitation to Rydberg levels, and we exploit the resulting dipole-dipole interaction  ...  IST-2001-38863 (ACQP), FP6-013501-OLAQUI, FP6-015714-SCALA, and by the National Science Foundation through a grant for the Institute for Theoretical Atomic, Molecular and Optical Physics at Harvard University  ... 
doi:10.1016/j.optcom.2006.01.060 fatcat:fzq5salax5ehdk3osigcxvggau

Conditional Quantum Dynamics and Logic Gates

Adriano Barenco, David Deutsch, Artur Ekert, Richard Jozsa
1995 Physical Review Letters  
Quantum logic gates provide fundamental examples of conditional quantum dynamics.  ...  dipole interaction.  ...  Our second proposal for the implementation of the quantum controlled{NOT gate relies on the dipole{dipole interaction between two qubits.  ... 
doi:10.1103/physrevlett.74.4083 pmid:10058408 fatcat:y6s5vp42ofghjaqyqaub7colcy

Quantum Logic Gates in Optical Lattices

Gavin K. Brennen, Carlton M. Caves, Poul S. Jessen, Ivan H. Deutsch
1999 Physical Review Letters  
We propose a new system for implementing quantum logic gates: neutral atoms trapped in a very far-off-resonance optical lattice.  ...  Atoms interact only during logical operations, thereby suppressing decoherence.  ...  flushed from a register, and the gate operated a second time before readout.  ... 
doi:10.1103/physrevlett.82.1060 fatcat:ozxycjwxdjhpfofh56dvbf7yh4

Quantum phase gate and controlled entanglement with polar molecules

Eric Charron, Pérola Milman, Arne Keller, Osman Atabek
2007 Physical Review A. Atomic, Molecular, and Optical Physics  
This entanglement arises from dipole-dipole interaction, and is controlled by a sequence of laser pulses simultaneously exciting both molecules.  ...  We propose an alternative scenario for the generation of entanglement between rotational quantum states of two polar molecules.  ...  Acknowledgments The authors are indebted to Claudine Crépin and Michel Broquier for inspiring discussions.  ... 
doi:10.1103/physreva.75.033414 fatcat:q4ol4w2dlvei3kv3y3ihy7ioeq

Toward scalable information processing with ultracold polar molecules in an electric field: A numerical investigation

Laëtitia Bomble, Philippe Pellegrini, Pierre Ghesquière, Michèle Desouter-Lecomte
2010 Physical Review A. Atomic, Molecular, and Optical Physics  
We focuse on the possibilities of performing scalable logical operations by considering circuits that involve intermolecular gates (implemented on adjacent interacting molecules) to enable the transfer  ...  perspectives for the manipulation of a large number of qubits in these systems.  ...  Teuler for technical assistance. This research was supported by Triangle de la Physique under Contract 20009-038T.  ... 
doi:10.1103/physreva.82.062323 fatcat:uo4o5a7iqvdankynzlpgiyjm5m

Solid state coherent quantum dot system for quantum computing and quantum transmission

Hideaki Matsueda
2003 International journal of circuit theory and applications  
So we propose a prospective model of a solid state integrated circuit for quantum computation, based on our coherence retentive dynamic dipole-dipole interaction theory.  ...  , as well as a quantum controlled controlled not (CCN) gate of the block structure.  ...  Each block works as a bit (qubit) for computation. Every row in Fig.2 executes a bank of operations step by step [2] .  ... 
doi:10.1002/cta.222 fatcat:ngcid2cgevasfcdiw24diq5jbu

Operation of a quantum phase gate using neutral atoms in microscopic dipole traps

I. E. Protsenko, G. Reymond, N. Schlosser, P. Grangier
2002 Physical Review A. Atomic, Molecular, and Optical Physics  
The gate operates when the atoms are excited using a two-photon transition from the hyperfine manifold of ground states up to Rydberg states with strong dipole-dipole interaction.  ...  In this paper we propose and analyze various operating regimes of a quantum phase gate built on two atoms trapped in two independent dipole traps.  ...  I.E.P. is also grateful to the Russian Foundation for Basic Research, Grant No. 01-02-17330, for support.  ... 
doi:10.1103/physreva.65.052301 fatcat:igem5723vnegze3xaf7jpkbmzy

Repeat-until-success distributed quantum computation by using single-photon interference at a beam splitter

Xun-Li Feng, Jun Qian, L. C. Kwek, C. H. Oh
2008 Physical Review A. Atomic, Molecular, and Optical Physics  
the implementation of the CPhase gate operation for dipoles A and B with c 1 ͉⌿ 1 ͘ = ␣͉00͘ + ␤͉01͘ + ␥͉10͘ and c 2 ͉⌿ 2 ͘ = ␦͉11͘.  ...  III gives an encoding method for the implementation of controlled-phase ͑CPhase͒ gate operation according to the dipole-induced-transparency ͑DIT͒ effect, in Sec.  ... 
doi:10.1103/physreva.78.012354 fatcat:dwnqgxbb3ncqjjxn5l5eklnpoi

Conditional dynamics induced by new configurations for Rydberg dipole-dipole interactions

E. Brion, A. S. Mouritzen, K. Mølmer
2007 Physical Review A. Atomic, Molecular, and Optical Physics  
We suggest a novel way to use strong Rydberg dipole-dipole interactions in order to induce non-trivial conditional dynamics in individual-atom systems and mesoscopic ensembles.  ...  on the information they contain through a proper use of dipole-dipole interaction induced energy shifts.  ...  Saffman for fruitful discussions.  ... 
doi:10.1103/physreva.76.022334 fatcat:sxlh4dkknzh67nefytrpyzb4qm
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