<div dir="ltr"><div>(With apologies for cross-posting)</div><div><br></div><div><div><font style="font-family:Calibri,Helvetica,sans-serif,serif,"EmojiFont"" size="3" face="Calibri,Helvetica,sans-serif" color="black"><span style="font-size:12pt" id="m_8909308687744340670gmail-divtagdefaultwrapper"><font size="3" face="Calibri,Helvetica,sans-serif,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" color="black"><span style="font-size:12pt" id="m_8909308687744340670gmail-divtagdefaultwrapper"><div><b>Workshop Title</b>: "New Perspectives on the Philosophy of Quantum Physics"<br>
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<b>Date</b>: 11 May 2023, 15:00-19:30 CEST<br></div><div><br></div><div><font style="font-family:Calibri,Helvetica,sans-serif,serif,"EmojiFont"" size="3" face="Calibri,Helvetica,sans-serif" color="black"><span style="font-size:12pt" id="m_8909308687744340670gmail-divtagdefaultwrapper"><font size="3" face="Calibri,Helvetica,sans-serif,EmojiFont,Apple Color Emoji,Segoe UI Emoji,NotoColorEmoji,Segoe UI Symbol,Android Emoji,EmojiSymbols" color="black"><span style="font-size:12pt" id="m_8909308687744340670gmail-divtagdefaultwrapper">
<b>Format</b>: Hybrid (<u>to receive the Zoom link, please register </u><a href="https://forms.gle/xBfrboer9W6yk7eEA" rel="noopener noreferrer" style="text-decoration:underline" target="_blank">here</a>)</span></font></span></font></div><div>
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<b>Venue</b>: Warsaw University of Technology, main building, room 206 <br>
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<b>Organizers</b>: <a href="https://ans.pw.edu.pl/Nauka/Zespoly-badawcze/Philosophy-of-Physics-Group" rel="noopener noreferrer" style="text-decoration:underline" target="_blank">Philosophy of Physics Group</a> (WAiNS PW) and <a href="https://csz.pw.edu.pl/index.php/cszeng" rel="noopener noreferrer" style="text-decoration:underline" target="_blank">Center for Advanced Studies</a> (PW)<br>
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<b>Contact</b>: <a href="mailto:antonio.vassallo@pw.edu.pl" target="_blank">antonio.vassallo@pw.edu.pl</a><br>
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<b>Program</b>:</div>
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15:00-15:15 Welcome address by the Dean of the Faculty of Administration and Social Sciences PW<br>
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15:15-16:30 Davide Romano (University of Lisbon): "A decoherence-based approach to the classical limit in Bohm’s theory"<br>
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16:30-17:45 Tomasz Bigaj (University of Warsaw): "On the identity and persistence of quantum objects"<br>
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17:45-18:15 Coffee break<br>
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18:15-19:30 Antonio Vassallo (Warsaw University of Technology): "A Machian framework for quantum physics"<br>
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20:00 Social dinner<br>
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<b>Abstracts</b>:<br>
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<i>A decoherence-based approach to the classical limit in Bohm’s theory</i><br>
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I present an account of the quantum-to-classical transition in Bohm’s theory based on the following three steps: (i) the interaction with the environment produces
effectively factorized states, leading to the formation of effective
wave functions and hence decoherence; (ii) the effective wave functions
selected by the environment–the pointer states of decoherence
theory–will be well-localized wave packets, typically Gaussian states;
(iii) the quantum potential of a Gaussian state becomes negligible under
standard classicality conditions; therefore, the system will move
according to Newtonian mechanics in the correct
classical limit. As a result, a Bohmian system in interaction with the
environment is described by an effective Gaussian state and–when the
system is macroscopic–it moves approximately according to Newtonian
mechanics.<br>
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***<br>
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<i>On the identity and persistence of quantum objects</i><br>
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This talk will broadly evaluate the problem of the identity,
discernibility, individuality and persistence of quantum particles,
taking into account the ubiquitous symmetrization postulate with respect
to the states of same-type particles. Several interpretative
options will be considered, compared and contrasted, ranging from the
total indiscernibility and non-individuality of quantum objects to their
qualitative absolute discernibility. I will pay particular attention to
the problem of the reidentification of quantum
objects over time, taking into consideration a recent proposal by Philip
Goyal of how to derive the symmetrization postulate from some
postulates regarding the transition amplitudes for the systems of
same-type particles.<br>
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***<br>
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<i>A Machian framework for quantum physics</i><br>
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The talk presents an extension of the metaphysics of self-subsisting
structures to the realm of non-relativistic quantum physics. The
discussion is centered around a Pure Shape Dynamics model representing a
relational implementation of a De Broglie-Bohm N-body
system. An interpretation of this model in terms of self-subsisting
structures is proposed and assessed against the background of the debate
on the metaphysics of quantum physics, with a particular emphasis on
the nature of the wave function. The analysis shows
that elaborating an appropriate Leibnizian/Machian metaphysics of the
quantum world requires a substantial revision of the notion of
world-building relation. [Based on joint work with Tim Koslowski and
Pedro Naranjo]</div>
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