The IBM Q Initiative as a Resource for HEP Quantum Computing · The IBM Q Network (Information...
Transcript of The IBM Q Initiative as a Resource for HEP Quantum Computing · The IBM Q Network (Information...
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The IBM Q Initiative as a Resource for HEP Quantum Computing
Next Steps in Quantum Science for HEP Fermilab
Sept 12-14, 2018
Patrick DreherResearch Professor, Computer Science
Associate Faculty, Department of PhysicsNC State University
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Resource Perspective for HEP Quantum Computing Seen from an IBM Q Hub
OUTLINE• IBM Q Initiative• The IBM Q Network• The NC State Hub
– Educational Component– Research Component
• IBM Q as a Resource for High Energy Physics– Simulators– Quantum computing hardware
• Practical Next Steps and Summary
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What is the IBM Q Initiative
• IBM Q is an industry-first initiative to build commercially available universal quantum computing systems for business and science.
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IBM Q Network Summary Description
• IBM is establishing the IBM Q Network as a worldwide organization of companies, academic institutions and national research lab pursuing practical applications for quantum computing
• Goal is to significantly increase the computational capability of future quantum systems and demonstrate computational capabilities beyond today’s classical computing systems
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The IBM Q Network (Information Provided by IBM – September 2018)
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Hubs Hubs Partners Education Partner
Members Startups
Keio University Tokyo, Japan
Oxford University Oxford, UK
Oak Ridge National Laboratory Oak Ridge, TN, USA
University of Melbourne Parkville VIC, Australia
North Carolina State UniversityRaleigh, NC, USA
Universität der Bundeswehr München, Germany
JPMCNew York, NY, USA
AccentureDublin, Ireland
SamsungSeoul, South Korea
DaimlerStuttgart, Germany
JSRMinato-ku, Tokyo, Japan
MITCambridge, MA, MA, USA
HondaMinato, Tokyo, Japan
BarclaysLondon, UK
Hitachi Metals Minato, Tokyo, Japan
NagaseChuo-ku, Tokyo, Tokyo, Japan
1QBit
Cambridge Quantum Computing
Q-CTRL
QC Ware
Quantum Benchmark
QxBranch
Strangeworks
Zapata Computing
Academic PartnerUniversidadedo Minho Portugal
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Types of Engagement within the IBM Q Network*
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HubsRegional centers for training, education, technical support
workshops, events and opportunities for joint work
Hub
Chemical Company
University
Automotive Company
IBM
Oil and Gas Company
Financial Company
PartnersFocused on quantum
computing in a specific industry or academic field
IBM
Chemical Company
Automotive Company
Oil and Gas Company
Financial Company
Pharma Company
MembersStartups and industry
IBM
Startup
Startup
Startup
Startup
* Figures courtesy of IBM
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IBM Q Network: North Carolina State Hub
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Announced May 10, 2018Tentative Operational Date: October 1, 2018
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• The NC State Hub is advancing 3 programs1. Educational role
a) Rapid expansion of course offerings internally within the Universityb) External quantum computing curriculum development
i. Support for hub partner trainingii. Short courses and seminars iii. Public educational outreach in quantum computing
2. Potential research opportunitiesa) Partnerships with other universities b) Research collaborations
3. Building research and project Industrial Partners –this programmatic aspect of the hub not strongly tied to HEP
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NC State IBM Q Hub
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• External– Series of short introductory and intermediate QC
courses open to the larger community • Modelled after NCSU existing Data Science Initiative• Aimed at students and professionals in business,
research, and government– Specialized QC courses for NCSU hub partners –
customized per request – Quantum computing campus speaker series – Additional course and training being developed in
coordination with ORNL -- Quantum Computing Institute (ORNL IBM Hub)
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NCSU Hub Educational Role
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• Internal– Upper level undergrad and grad courses being
developed in several academic departments that will have resource ties to Hub
– Working with beta version of portal software developed by IBM Yorktown Heights for use in classes working with the IBM Q Composer tool for 5 qubit QC Circuits
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NCSU Hub Educational Role
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NCSU Hub Research Role
• Research – several aspects– Infrastructure
• Develop procedures and software for customized desktop installations for IBM Q access (Jupyter notebooks, container based images for IBM Q access on cloud computing, etc.)
– Operational• Develop and test the connectivity and sessions to the simulators
and various IBM QC hardware devices
– Internal• Various NCSU faculty have begun QC research projects using the
IBM Q simulators and QC hardware
– External • University is in discussions with several universities regarding
partner type participation with NCSU in the IBM Q
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• For HEP - focus is on the educational and research aspects of a hub
• General Resources– Composer (Graphical Gate Interface - 5 qubit only )
• Beta version of portal for educational courses (NCSU-IBM)
– Simulators– Software environments– Multiple quantum computer hardware platforms
• 20 qubit machine (today) and 50 qubit machine (anticipated early 2019)
• Research possibilities
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Working with the IBM Q in High Energy Physics
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Resources - IBM Q Composer
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Interactive Graphical Interface to experiment constructing gate operations for 5 qubit machine
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Gate Construct Example with Composer
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11000 00000
.470 .530
Composer simulation also generates QASM code
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Resources - Simulators• Composer only works on 5 qubit machine• Working with larger QC hardware will require writing
code • There is a 32 qubit QASM simulator• Open Quantum Assembly Language (QASM)
– Interface language for the Quantum Experience that enables experiments with small depth quantum circuits to be coded and run on QC platforms
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Resources - Software Environments
• Jupyter notebooks / desktop environments for developing QC code
• Ongoing software development work to build language hierarchy for QC program execution– Programming languages– Convert to program binary– Convert to QC executable– Construct low level gate operations
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Resources - QC Hardware Platforms*
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Chip with superconductingqubits and resonators
PCB with the qubit chip at 15 mKProtected from the environment by multiple shields
Microwave electronics
Refrigerator to cool qubits to 10 - 15 mKwith a mixture of 3He and 4He
3K
0.9K
0.1K
0.015K
40K
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* Slide courtesy of IBM
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5 Qubit Tenerife (ibmqx4)
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Slide courtesy of IBM
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16 Qubit Rüschlikon (ibmqx5)
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Slide courtesy of IBM
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20 Qubit Toyko (ibmq_20_Toyko)
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What Can Be Expected for HEP Algorithms Implemented on a QC
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Hamiltonians of Interest in HEP(this conference/workshop)
• High Energy physics problems with potential interest for implementation on a quantum computer– Spin systems with analogous strong or weak interaction
properties– Condensed matter – Dynamic evolution of systems– Finite density systems – quark gluon plasma – Abelian gauge theories – Non-abelian gauge theories
• Quenched and unquenched QCD
– Alternative formulations - Quantum Link Models– Quantum gravity– Other talks this conference-workshop
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Potential Approaches for QC Simulations(this conference/workshop)
• Potential approaches to developing QC codes using present and near-term future HW and SW– Quantum classical approach
• Transform 1st quantized to 2nd quantized Hamiltonian (Jordan-Wigner, Bravyi-Kitaev, etc)
• Phase estimation algorithm• Variational Quantum Eigensolver• other
– Directly construct product state Hamiltonian that can be mapped to a quantum computer
• Transform 1st quantized to 2nd quantized Hamiltonian (Jordan-Wigner, Bravyi-Kitaev, etc)
• Quantum Fourier transform – transforms creation annihilation Hamiltonian formulation to a momentum space Hamiltonian
• Bogoliubov transformation – decouple modes with opposite momentum
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Practical Limitations Present and Near-Term Future QC Simulations
• Number of qubits available is limited• Available qubits are characterized by NISQ (Noisy
Intermediate-Scale Quantum)• Machine dependent constraints with direct connectivity
between qubits– Complexity of qubit Hamiltonian– Qubit coherence and gate errors– Circuit depth– Issues of Scalability
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Example of Practical QC Limitations:Bernstein Vazirani Algorithm
• The Bernstein Vazirani Algorithm is a mathematical –computer science algorithm that poses the problem of how to determine the value of a hidden integer from an oracle fs that returns a bit from
upon receiving an input
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S ∈ 0,1 𝑛𝑛
s⋅ 𝑥𝑥 ≡ ∑𝑖𝑖 𝑠𝑠𝑖𝑖 𝑥𝑥𝑖𝑖
mod 2
𝑥𝑥 ∈ 0,1 𝑛𝑛
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Classical Determination of the Value “s”
• Classically the hidden integer can be discovered by querying the oracle with
x = 1, 2, ….,2n-1
• Each query provides the ith bit of information that can be discovered
• The classical approach requires n probes of the oracle to determine the value of “s”
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Quantum Mechanical Construction of Bernstein Vazirani Problem
• Querying the quantum oracle one notices that
• This equation can be re-expressed by a unitary transformation that is decomposable as single-qubit unitarieswhere
Z is the Pauli Z matrixI is the identity matrix
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−1 s⋅𝑥𝑥 = −1 𝑠𝑠1⋅𝑥𝑥1 . . . −1 𝑠𝑠𝑛𝑛⋅𝑥𝑥𝑛𝑛 = �𝑖𝑖:𝑠𝑠𝑖𝑖=1
−1 𝑥𝑥𝑖𝑖
ℚ𝑓𝑓𝑠𝑠 = ℚ1 ⊗ℚ2 ⊗. . . .ℚ𝑖𝑖 ⊗. . .ℚ𝑛𝑛
ℚ𝑖𝑖 = (1 − 𝑎𝑎𝑖𝑖)𝐼𝐼 − 𝑠𝑠𝑖𝑖𝑍𝑍
}𝑠𝑠𝑖𝑖 ∈ {0,1
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Bernstein Vazirani Procedure
• Procedure– Start with a |0> state– Apply series of transformations that can be described
by unitaries acting on a single qubit– Apply Hadamard gates to each qubit– Call the decomposable quantum oracle – Apply another set of Hadamard gates– Measure the result
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Graphical Representation of 4 Qubit Example of Bernstein Vazirani Problem
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Simulators and QC hardware
• Pick s=9 and run the BV algorithm on both the IBM Q simulator and quantum hardware
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20 Qubit Machine
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Number of Qubits versus Error Rate*
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10,000
40,000
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* Slide courtesy of IBM
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Summary from a Hub PerspectiveReflections on Practical Next Steps for HEP • Need realistic near term perspective for transforming HEP
problems/algorithms to QC ready formulations – QC spans multiple intellectual disciplines strong need
for educational outreach at all levels & across disciplines– Gain practical experience using QC simulators and
hardware resources – QC HW facilities are scarce – capitalize on opportunities
to build multidisciplinary research partnerships with cross pollination of skill sets
– Work toward hybrid NISQ solutions in intermediate term (FTQEC not practical in near/intermediate future)
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Thank You For Your Attention
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Questions
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